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  • Dynamic Modeling of Integrated Mixed Reforming and Carbonless Heat Systems
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Leila Hoseinzade, Thomas A. Adams
    更新日期:2018-01-19
  • 更新日期:2018-01-19
  • Fabrication of Mechanically Strong Honeycombs with Aerogel Cores
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Lauren S. White, Tyler Selden, Massimo F. Bertino, Charles Cartin, Joseph Angello, Marina Schwan, Barbara Milow, Lorenz Ratke
    更新日期:2018-01-19
  • Investigation of Pyridine Synthesis in a Fast Fluidized Bed Reactor
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Shuaishuai Zhou, Zelong Liu, Di Qin, Xiao Yan, Mengxi Liu, Chunxi Lu, Guangzhou Jin
    更新日期:2018-01-19
  • Simulation of a Transpiring Wall Reactor for Supercritical Water Oxidation: Characteristics of Water Film
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Donghai Xu, Shuwei Guo, Zhen He, Chuanbao Huang, Zefeng Jing, Shuzhong Wang
    更新日期:2018-01-19
  • Lactic acid extraction in systems containing organic amines
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Igor Yu. Fleitlikh, Boris N. Kuznetsov, Lidya Nikiforova, Natalya A. Grigorieva, Natalya Beregovtsova

    A new high-performance system for lactic acid (HL) extraction from glucose-containing solutions is proposed. Trialkylbenzylammonium sulfate (C7–C9 fraction) with P-tertbutyl phenol in a diluent is used as the extractant. The maximum extraction region for HL is found to be at pH = 5.0–7.0, which coincides with the range of optimal pH values for glucose conversion to lactic acid. In 5 extraction stages, at an organic to aqueous phase ratio of 1:1, the acid recovery is 96.7%. HL stripping is carried out with 2.0–3.0 M NaOH solutions which achieves a significant increase in HL concentration. The stripping process in alkaline medium is easy (not less than 93.45% in one stage) due to the formation of trialkylbenzylammonium phenolate in the organic phase. Regeneration and conversion of the extractant to the SO4-form (TABAS) are carried out by treating the organic phase with sulfuric acid.

    更新日期:2018-01-19
  • Strengthening the catalytic activity for ozonation of Cu/Al2O3 by electroless plating-calcination process
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Yi Ren, Jun Li, Jiali Peng, Fangzhou Ji, Bo Lai

    A new method of electroless plating-calcination was developed to prepare Cu/Al2O3 with high catalytic activity and long operational life for catalytic ozonation. First, effects of key preparation parameters on the catalytic activity of new Cu/Al2O3 were investigated. In addition, new Cu/Al2O3 prepared by electroless plating-calcination and conventional Cu/Al2O3 prepared by impregnation-calcination were characterized. The results show that when Cu/Al2O3 were prepared by electroless plating-calcination, copper oxides was uniformly and densely deposited on the surface of Al2O3, and the copper compounds consist of CuO. Furthermore, the catalytic activity and operational life of the two kinds of Cu/Al2O3 was also investigated comparatively. The results confirmed the advantage of the new method for the preparation of Cu/Al2O3 for catalytic ozonation. Finally, the degradation pathway was proposed. It can be concluded that electroless plating-calcination is a promising technology to prepare the robust Cu/Al2O3 with high catalytic activity for the decomposition of ozone.

    更新日期:2018-01-19
  • Electrical Capacitance Volume Tomography for Characterization of Gas-Solid Slugging Fluidization with Geldart Group D Particles under High Temperatures
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-19
    Dawei Wang, Mingyuan Xu, Qussai Marashdeh, Benjamin Straiton, Andrew Tong, Liang-Shih Fan

    A 3-dimensional ECVT sensing technique is applied to imaging complex slugging phenomena of a gas-solid fluidized bed under ambient and elevated temperature conditions. The study indicates that the time interval between rising slugs decreases with an increase in the gas velocity, reaching a nearly steady time interval value of about 1 second between two slugs when the gas velocity is ~1.7 m/s above the minimum fluidization velocity. The fluidized bed behaves as a bubbling fluidized bed at low gas velocities. In slugging regime, the slug rise velocity increases with the gas velocity. A mechanistic analysis of forces around the dense phase solid particles suggests that the relationship between the slug rise velocity and the gas velocity for the square-nosed slugging bed is not strictly linear and is highly related to the inter-particle forces, internal friction of particles and gas velocity in addition to the wall stress.

    更新日期:2018-01-19
  • 更新日期:2018-01-19
  • Insights on the mechanisms of H2S retention at low concentration on impregnated carbons
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-18
    Randreanne L.C.B. Menezes, Karine Oliveira Moura, Sebastiao M.P. Lucena, Diana C. S. Azevedo, Moises Bastos-Neto

    Adsorption of H2S onto porous materials is as an attractive technology for fine biogas cleaning. Three activated carbon samples were studied as adsorbents for biogas desulfurization at low concentration (100 ppm), in order to better understand the underlying mechanisms and provide a basis for the development of new materials. One of the carbons is impregnated with NaOH, other with Fe2O3 and the third one is the parent material. Molecular simulation was performed to distinguish the retention mechanism. Textural characterization revealed high surface areas and the existence of ultramicropores with sizes below 4 Å in all samples. The possibility of discriminating the retention regimes emphasized the great influence of the chemisorption in these systems increasing up to 50 times the capacity of retention of H2S for the sodium-impregnated sample (from 0.3 to 15.64 mg g-1). Surprisingly, both physisorption and chemisorption could be unequivocally detected for the non-impregnated sample by evaluating breakthrough curves in different temperatures (up to 423 K). The evaluation of regeneration by heat indicated that the adsorbents can recover about 50% and 20% of their initial capacity for non-impregnated and impregnated samples, respectively.

    更新日期:2018-01-19
  • Oxygen Removal from Oxy-combustion Flue Gas for CO2 Purification via Catalytic Methane Oxidation
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-18
    Qinghe Zheng, Shaojun Zhou, Marty Lail, Kelly Amato

    Typical allowable O2 concentration in recovered CO2 for certain applications including Enhanced Oil Recovery (EOR) is as low as 100 ppmv. The removal of high content O2 (3-5%) in oxy-combustion flue gas requires additional compression work in conventional downstream CO2 purification process. RTI hereby proposes to develop a novel technology for flue gas O2 removal based on catalytic oxidation of natural gas. Preliminary catalytic tests were performed over various supported Pd and Pt catalysts under simulated oxy-combustion flue gas conditions, with the addition of stoichiometric amount of CH4 as model compound for natural gas. Among the studied catalysts, Pd supported on zeolite H-ZSM-5 showed the highest oxygen conversion at relevant condition. Compared to Pt catalysts, Pd catalysts generally showed higher oxidation reaction kinetics. The catalytic oxidation activity can be further increased by optimizing reaction gas hourly space velocity (GHSV) and total reaction pressure.

    更新日期:2018-01-19
  • Effects of Force Field Selection on the Computational Ranking of MOFs for CO2 Separations
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-18
    Derya Dokur, Seda Keskin

    Metal organic frameworks (MOFs) have been considered as highly promising materials for adsorption-based CO2 separations. The number of synthesized MOFs has been increasing very rapidly. High throughput-molecular simulations are very useful to screen large number of MOFs in order to identify the most promising adsorbents prior to extensive experimental studies. Results of molecular simulations depend on the force field used to define the interactions between gas molecules and MOFs. Choosing the appropriate force field for MOFs is essential to make reliable predictions about the materials’ performance. In this work, we performed two sets of molecular simulations using the two widely used generic force fields, Dreiding and UFF, and obtained adsorption data of CO2/H2, CO2/N2 and CO2/CH4 mixtures in 100 different MOF structures. Using this adsorption data, several adsorbent evaluation metrics including selectivity, working capacity, sorbent selection parameter, per cent regenerability were computed for each MOF. MOFs were then ranked based on these evaluation metrics and top performing materials were identified. We then examined the sensitivity of the MOF rankings to the force field type. Our results showed that although there are significant quantitative differences between some adsorbent evaluation metrics computed using different force fields, rankings of the top MOF adsorbents for CO2 separations are generally similar. 8, 8, and 9 out of the top 10 most selective MOFs were found to be identical in the ranking for CO2/H2, CO2/N2 and CO2/CH4 separations using Dreiding and UFF. We finally suggested a force field factor depending on the energy parameters of atoms present in the MOFs to quantify the robustness of the simulation results to the force field selection. This easily computable factor will be highly useful to determine whether the results are sensitive to the force field type or not prior to performing computationally demanding molecular simulations.

    更新日期:2018-01-19
  • A Novel Four-Way Plasma-Catalytic Approach for The After-Treatment of Diesel Engine Exhausts
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-18
    Shuiliang Yao, Huanhuan Zhang, Xing Shen, Jingyi Han, Zuliang Wu, Xiujuan Tang, Hao Lu, Boqiong Jiang, Tomohiro Nozaki, Xuming Zhang
    更新日期:2018-01-18
  • Mixed oxides confined and tailored cobalt nano catalyst for direct ethanol synthesis from syngas: a catalyst designing by using perovskite-type oxide as the precursor
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-18
    Shaoxia Guo, Shuangshuang Li, Huixian Zhong, Dandan Gong, Jiaming Wang, Na Kang, Lihong Zhang, Guilong Liu, Yuan Liu

    A novel scheme is designed to prepare superior catalysts with good activity, high selectivity, and outstanding stability, excellent resistance to sintering and carbon deposition. In the scheme, the ions of lanthanum, strontium, cobalt and gallium were confined into La1-xSrxCo0.65Ga0.35O3 with perovskite structure and uniformly dispersed at the atomic level; by reducing La1-xSrxCo0.65Ga0.35O3, a strong interaction between the active sites and promoters exists, and good catalytic performance for direct ethanol synthesis (DES) can be obtained. According to the design scheme, a series of La1-xSrxCo0.65Ga0.35O3 (x = 0 - 0.4) and La0.7Sr0.3CoO3 (LSC) catalysts were prepared by citric acid complexation method and characterized by XRD, H2-TPD, TPR, TEM, BET, XPS and TG techniques. Thanks to the excellent catalyst design scheme, the catalyst reduced from La0.7Sr0.3Co0.65Ga0.35O3 showed good activity, high selectivity and excellent stability for DES. Simultaneously, this catalyst design scheme can be extended to the design of other catalysts.

    更新日期:2018-01-18
  • Synthesis of ceria and sulfated zirconia catalysts supported on mesoporous SBA-15 toward glucose conversion to HMF in a green isopropanol-mediated system
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-18
    Yunlei Zhang, Qingang Xiong, Yao Chen, Meng Liu, Pei Jin, Yongsheng Yan, Jianming Pan

    In this work, a facile synthesis of ceria and sulfated zirconia (SZ) incorporated SBA-15 catalyst was conducted. The supported SZ reveals promising Brønsted/Lewis acid and relatively low base strength. And the base strength of catalyst is significantly enhanced by introducing highly dispersed ceria into the network of SZ incorporated SBA-15. Systematic study of catalysts activities were carried out in iPrOH/DMSO solvent conversion of glucose to 5-hydroxymethylfurfural (HMF). It is found that isomerization process of glucose to fructose was promoted by co-existed base and Lewis acid sites, and the dehydration reaction of reactively formed fructose to HMF was directed by Brønsted acid sites. Up to 66.5% of HMF yield and 70.8% of selectivity can be obtained in a 90 vol% iPrOH-mediated DMSO solvent. Through the developed reaction system in this paper, use of large amount of environmentally hazardous solvent can be avoided, and a new way to large-scale economically viable processes for biomass conservation is provided.

    更新日期:2018-01-18
  • Direct Synthesis of the Reduced Co–C/SiO2 As an Efficient Catalyst for Fischer–Tropsch Synthesis
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Yong-Hua Zhao, Chang Liu, Yong-Hong Song, Qi-Jian Zhang, Min-Li Zhu, Zhao-Tie Liu, Zhong-Wen Liu
    更新日期:2018-01-18
  • Non-quilibrium and Equilibrium Stationary States of Zwitterionic Surfactant Dynamic Adsorption on Limestone Cores at Oil-Reservoir Conditions
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    David Aaron Nieto-Alvarez, Adlai Marin-Leon, Erick E. Luna-Rojero, José-Manuel Martínez-Magadán, Raul Oviedo-Roa, Marissa Pérez-Alvarez, Galileo Dominguez-Zacarías, Luis S. Zamudio-Rivera

    Dynamic adsorption of a zwitterionic-type surfactant cocamidopropyl hydroxysultaine on limestone cores at oil reservoir conditions, i.e., under 2,000 psi pressure, 130 ºC temperature, and in presence of seawater with 30,800 ppm as NaCl, has been studied through core-flood displacement tests and in the absence of oil, at an injection rate of 120 cm3.h-1 up to 60 pore volumes (PV). The amount of adsorbed surfactant has been determined from mass balance by calculating its concentration through High Performance Liquid Chromatography (HPLC). The normalized surfactant concentrations (NSC) have been used in terms of the PV, and then they are obtained the corresponding dynamic adsorption curves. Dynamic adsorption isotherm curves of the zwitterionic surfactant diluted in seawater showed a steep rise between 1 and 3 pore volumes (PV), and the saturation conditions were kept up to 60 PV. An average surfactant adsorption of 0.1138  0.0126 mg⋅g-1 was determined. Quantum theoretical studies show that the electronic energy gap of (104) the limestone is electrically neutral, preferably acquiring a negative charge tendency, these results imply that the calcite surface will preferentially interact with positive ions, so that the cations present in the solution interacting in the limestone, resulting in a positive charge in the rock that implies that the surfactant cocamidopropyl hydroxysultaine interacts in the rock by the anionic group

    更新日期:2018-01-18
  • Ternary HNO3-H2SO4-H2O mixtures: a simplified approach for the calculation of the equilibrium composition
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Danilo Russo, Raffaele Marotta, Mario Commodo, Roberto Andreozzi, Ilaria Di Somma

    Concentrated ternary mixture of nitric acid, sulfuric acid and water are often used in the chemical industry for a wide range of applications. Among these, nitrations of organic substrates are the most common. Nevertheless, there is still a poor understanding of speciation of the acids in the mixtures and different simplified or semi-empirical approaches have been found in the literature to model nitration kinetics by mixed acids. Most of the found investigations are relevant in restricted ranges of experimental conditions, resulting in a fragmentary vision. In this work, most of the approaches found in the literature were reviewed in order to define their limits of validity and new empirical equations for the estimation of nitronium ion concentration are proposed. Moreover, on the basis of original experimental data, a simplified model is proposed to calculate the dissociation of acids at varying experimental conditions and the main assumptions reported in the literature were verified. Adopted simplifying assumptions were verified at sulfuric acid concentration higher than 2.1 mol∙L-1, and nitric acid concentration ranging from 2.0 to 11 mol∙L-1.

    更新日期:2018-01-18
  • Vapor liquid equilibria for acetic acid – acetaldehyde - crotonaldehyde system: Gibbs ensemble molecular simulation for pure components and binary systems, and NRTL model prediction for ternary system
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Minhua Zhang, Lihang Chen, Huaming Yang, Jing Ma

    The vapor–liquid equilibrium (VLE) for the system acetic acid, acetaldehyde and crotonaldehyde was investigated by combining the Gibbs ensemble Monte Carlo (GEMC) method and activity coefficient models prediction. The VLE of above pure components and their binary systems were firstly studied using GEMC method. Based on the strong association characteristics of acetic acid, the revised TraPPE-UA-D force field was developed with quantum chemistry methods for the VLE calculation of acetic acid system. The original and mixed TraPPE-UA force field was introduced for the VLE calculation of acetaldehyde and crotonaldehyde system, respectively. The results showed that the predictions agreed fairly well with the average relative deviations of the saturated densities smaller than 4.60%. Moreover, binary VLE diagram was calculated using above force fields. The simulation results of the mole composition were in good agreement with the experimental values, which verified the high simulation accuracy of the adopted force fields. On this basis, the VLE of the ternary system were predicted with the NRTL and NRTL-HOC models, and binary interaction parameters of the models were obtained by fitting the VLE simulation results of above binary systems. The simulation results were in accordance with the predictions obtained by the parameters from the Aspen data source. This work also provided a new and feasible way to obtain the VLE values of mixtures.

    更新日期:2018-01-18
  • Feasibility of bitumen production from unconverted vacuum tower bottom from H-Oil ebullated bed residue hydrocracking
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Rosen Kotcev Dinkov, Kiril Kirilov, Dicho Stoyanov Stratiev, Ilshat Mirgazianovich Sharafutdinov, Dimitar Dobrev, Duc Nguyen-Hong, Stephane Chapot, Jean-François Le-coz, Aneliya Burilkova, Diana Bakalova, Dobromir Ivanov Yordanov, Stefan Smilkov

    In relation to constant requirement for reduction of sulphur level and low demand for fuel oil, this study presents an approach for utilization of unconverted vacuum tower bottom (UVTB) from ebullated bed hydrocracking process – H-Oil technology in bitumen production. The conducted kinetic study shows slower softening point increase for crude blend 70 % Urals and 30 % Middle Eastern than other feeds in air blowing process. Also, penetration values for straight run vacuum residue feeds decrease quicker than the increase in their softening point values. UVTB softening point increase at high temperature is faster and penetration decrease is slower than LNB SRVR. Air blowing is shown to improve penetration index of UVTB to a greater extent than SRVR one. The bottleneck of this new application of UVTB is its low resistance to hardening, determined by using a rolling thin film oven (RTFO), which limits its quantity up to 20 – 30 % in blends.

    更新日期:2018-01-18
  • Piecewise Linear Approximation Based MILP Method for PVC Plant Planning Optimization
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Xiaoyong Gao, Zhenhui Feng, Yuhong Wang, Xiaolin Huang, Dexian Huang, Tao Chen, Xue Lian
    更新日期:2018-01-17
  • Hierarchically Porous Carbon Materials for CO2 Capture: The Role of Pore Structure
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Luis Estevez, Dushyant Barpaga, Jian Zheng, Sandip Sabale, Rajankumar L Patel, Ji-Guang Zhang, B. Peter McGrail, Radha Kishan Motkuri
    更新日期:2018-01-17
  • Gels: From Soft Matter to BioMatter
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Mitsuhiro Shibayama, Xiang Li, Takamasa Sakai
    更新日期:2018-01-17
  • The mixed potential plays a key role in leaching of chalcopyrite: experimental and theoretical analysis
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Congren Yang, Wenqing Qin, Hongbo Zhao, Jun Wang, Xingjie Wang

    The mixed potential plays a key role in leaching of chalcopyrite. Therefore, the impact of Fe2+ and Fe3+ on chalcopyrite leaching was investigated in this work. Simultaneously, the chalcopyrite passive film was studied by applying cyclic voltammetry (CV), potentiodynamic, potentiostatic and Tafel polarization. X-ray photoelectron spectroscopy (XPS) was used to analyze the products formed during the electrochemical treatment of chalcopyrite. Furthermore, the band theory was used to analyze the oxidation and reduction of chalcopyrite. High copper extraction percentage was obtained at low mixedpotential or ratio of Fe3+/Fe2+. The empty states of chalcopyrite overlapped with filled states of Fe2+, chalcopyrite captured electrons form Fe2+ and was reduced to chalcocite which was very easily oxidized by Fe3+. The Fe dissolves preferentially from the chalcopyrite surface in potentials range of 475 to 700 mV, and leave behind a S22− and Sn2− passive film. The chalcopyrite transpassive dissolution occurs above 700 V.

    更新日期:2018-01-17
  • Nano-array Cu/SiO2 Catalysts Embedded in Monolithic Channels for the Stable and Efficient Hydrogenation of CO2-derived Ethylene Carbonate
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Mingming Zhou, Yifeng Shi, Kui Ma, Siyang Tang, Changjun Liu, Hairong Yue, Bin Liang

    The unstable copper active sites and diffusion limitations of the current Cu-based catalysts are the key issues for the industrial ethylene carbonate (EC) hydrogenation reaction. Monolithic Cu-based catalysts were synthesized with the Cu/SiO2 nanoarrays embedded in cordierite channels via an in-situ hydrothermal process for catalytic EC hydrogenation to methanol (MeOH) and ethylene glycol (EG). The monolithic catalysts exhibited superb activity, with an EC conversion of 99% along with EG and MeOH selectivity of 97% and 50%, respectively. The characterization indicated that the high activities are attributed to the high dispersion of Cu species, appropriate proportion of surface Cu+ and Cu0, and negligible influence of inner diffusion, while the high stabilities are ascribed to the regular nano-array geometric structure and strong interactions between Cu species and SiO2. The Cu/SiO2 nano-array monolithic catalysts represent a new idea combining the properties of nanocatalysts and engineering of the practical industrial catalysts for EC hydrogenation.

    更新日期:2018-01-17
  • Non-monotonic effects of aerodynamic force on droplet size of prefilming air-blast atomization
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-17
    Hui Zhao, Zhao-Wei Wu, Wei-Feng Li, Jian-Liang Xu, Hai-Feng Liu

    The goal of this investigation is to improve the understanding of the mechanism on prefilming atomization. The coaxial two-fluid prefilming air-blast atomization has two airflows: inner air jet and outer air jet. It is generally believed that droplet size decreases monotonically with increasing gas velocity in air-blast atomization. However, this work shows that in prefilming atomization the droplet size increases with the increase of gas velocity, and then decreases with the increase of gas velocity when the velocity of the other airflow is high. The relationship between two air jets in prefilming air-blast atomization is mutual restriction rather than assistance. To investigate the non-monotonic phenomenon, the modified Kelvin-Helmhotz and Rayleigh-Taylor instability atomization model for the prefilming air-blast nozzle is induced. This study presents the model developed to predict the performance of coaxial atomizers, and the experimental results are consistent with the model estimates.

    更新日期:2018-01-17
  • 更新日期:2018-01-16
  • Delivery of Hydrophobic Anticancer Drugs by Hydrophobically Modified Alginate Based Magnetic Nanocarrier
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Ali Pourjavadi, Shiva Sadat Amin, Seyed Hassan Hosseini
    更新日期:2018-01-16
  • Fabrication of Z-Scheme Fe2O3–MoS2–Cu2O Ternary Nanofilm with Significantly Enhanced Photoelectrocatalytic Performance
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Yanqing Cong, Yaohua Ge, Tongtong Zhang, Qi Wang, Meiling Shao, Yi Zhang
    更新日期:2018-01-16
  • Optimal Start-Up Policies for a Solar Thermal Power Plant
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Maricarmen López-Alvarez, Antonio Flores-Tlacuahuac, Luis Ricardez-Sandoval, Carlos Rivera-Solorio
    更新日期:2018-01-16
  • Overcoming the Engineering Constraints for Scaling-Up the State-of-the-Art Catalyst for Tail-Gas N2O Decomposition
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Ignacio Melián-Cabrera, Silvia Espinosa, Cristina Mentruit, Blaine Murray, Lorena Falco, Joseph Socci, Freek Kapteijn, Jacob A. Moulijn
    更新日期:2018-01-16
  • Effects of poly(vinyl chloride) morphological properties on the rheology/aging of plastisols and on the thermal/leaching properties of films formulated using non-conventional plasticizers
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Sofia Marceneiro, Rafael Alves, Irene Lobo, Isabel Dias, Elizabete Pinho, Ana M.A. Dias, Maria G. Rasteiro, Herminio C. C. de Sousa

    There is an emergent demand for the replacement of petroleum-based plasticizers by equivalent non-toxic, biodegradable and environmentally friendly alternatives, presenting reduced leaching/volatilization profiles, while maintaining the performance of the plasticized materials. The efficiency of the plasticization process depends predominantly on the strength of the polymer-plasticizer interactions, which ultimately depend on the intrinsic physicochemical properties of the plasticizer, but also of the polymer. The aim of this work was to study the influence of the morphological properties of emulsion and micro-suspension poly(vinyl chloride) (PVC) and of non-conventional greener plasticizers on the rheological/aging properties of PVC-based plastisols and on the thermal and plasticizer leaching properties of films obtained from those plastisols. For that purpose two emulsion (with different K values) and one micro-suspension PVC grades were formulated with two commercially available castor oil based plasticizers (CITROFOL® AHII and GRINDSTED® SOFT-N-SAFE) and a phosphonium-based ionic liquid (trihexyl(tetradecyl)phosphonium bistriflamide, [P6,6,6,14][Tf2N]) which was used as a co-plasticizer. Plastisols formulated with the conventional plasticizer di-isodecyl phthalate (DIDP) were also prepared for comparison. Obtained results showed that the highest shear rates and plastisol aging were observed for plastisols formulated using the lower molecular weight emulsion PVC grade (E70-PVC) and the conventional plasticizer DIDP. The E70-PVC systems formulated using DIDP and citrate-based plasticizer presented a pseudo-plastic behavior while all the other systems presented a Newtonian profile. Lower mixing enthalpies were also calculated for PVC/DIDP systems, indicating more favorable interactions for PVC/phthalate systems over non-conventional plasticizers. This result may justify the non-effective gelation observed for some of the PVC/non-conventional plasticizer systems studied in this work. The incorporation of [P6,6,6,14][Tf2N] as a co-plasticizer significantly decreased the enthalpy of mixing of all the prepared plastisols, showing that its presence in the formulations may favor PVC/plasticizer interactions. Moreover PVC films obtained from plastisols formulated using this ionic liquid presented higher long-term thermal stability due to its negligible vapor pressure that avoids loss during usage.

    更新日期:2018-01-16
  • Effects of Compressed CO2 and Cotton Fibers on the Crystallization and Foaming Behaviors of PLA
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Xiaoli Zhang, Weidan Ding, Na Zhao, Jingbo Chen, Chul B Park

    The foaming behavior and thermal properties of neat PLA and PLA/cotton-fiber composite foams were investigated in this study. CO2 saturation pressure, temperature, and fibers content significantly affected the PLA’ crystallinity and foaming behaviors. At the same saturation temperature (140 °C), a low CO2 pressure generated non-uniform foam and a large unfoamed area due to too high crystallinity with a close-packed structure. At an intermediate pressure, a fine-cell structure was developed due to the presence of numerous less closely-packed crystals served as cell nucleating agents. A high CO2 pressure also led to a uniform cell structure but with larger cell sizes due to cell deterioration. Similar to the effect of saturation pressure, an intermediate temperature generated the uniform fine-cell structures. The PLA’s cell morphology was improved by the addition of cotton fibers at a low content because of the increased local stresses through the fibers and transcrystals surrounding the fibers.

    更新日期:2018-01-16
  • Merits of the addition of PTFE micropowder in scCO2 foaming of polypropylene: ultra-high cell density, high tensile strength and good sound insulation
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-16
    Chenguang Yang, Zhe Xing, Mouhua Wang, Quan Zhao, Guo-Zhong Wu

    Ultra-high-cell-density polypropylene foam was prepared by supercritical CO2 foaming in the presence of porous polytetrafluoroethylene (PTFE) micropowder. The voids of PTFE microparticles were filled with scCO2, causing them to split into multiple granules due to the force of its expansion during the pressure release, resulting in the formation of a large number of nucleation sites. The cell density of this foam reached 1010~1011 cells/cm3, which was 2 to 5 orders of magnitude higher than pristine PP foam. We proposed that the nanoscale granules resulting from the splitting of PTFE microparticles, and the growth of nucleated small cells generated the local strain field variation in the multiple-phase system were responsible for the considerably increased nucleation number of PP foaming. Additionally, the tensile strength and sound absorption property of PP/PTFE foam were largely enhanced and the preparation of ultra-high-cell-density PP/PTFE foam was easily controlled over a wider foaming temperature window.

    更新日期:2018-01-16
  • The beneficial use of ultrasound in rapid-synthesis of SAPO34/ZSM-5 nanocomposite and its catalytic performances on MTO reaction
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-15
    Eshagh Moradiyan, Rouein Halladj, Sima Askari

    SAPO-34 is a high selective and hydrothermal stable for MTO reaction but is rapidly deactivated by the formation of coke through its micropores. The promising SAPO-34/ZSM-5 nanocomposite catalyst with different ratio was synthesized by the ultrasonic-assisted hydrothermal method and obtained products characterized to further investigate their catalytic performance. Utilizing of ultrasound method lead to faster synthesis time, decrease of crystallite size, increase of surface area and dominant mesopore structure. The physicochemical properties of the product were extensively investigated by XRD, FESEM, TEM, FT-IR, N2 adsorption-desorption techniques, and NH3-TPD. Results indicate composite had high conversion and selectivity compared to the original ZSM-5 and SAPO-34. Composite structures due to synergic effect between ZSM-5 and SAPO-34 where acted as a promoted catalyst improved catalytic properties of composite catalysts. Moreover, SAPO-34/ZSM-5 nanocomposite catalyst with 50% ratio synthesized by ultrasonic-assisted hydrothermal method (U-S/Z (50%)) showed 100% conversion and 90% selectivity to light olefin at 450˚C.

    更新日期:2018-01-15
  • Citric acid-assisted synthesis of nanoparticle copper catalyst supported on oxide system for the reduction of furfural to furfuryl alcohol in the vapor phase.
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-15
    Naragalu Javaregowda Venkatesha, Sreerangappa Ramesh

    The simplest method of synthesizing metallic Cu (111) nanoparticle on the zinc-aluminum mixed oxides was found to be easily obtained by solid state grinding of all the three metal nitrates and organic compounds in suitable proportions. Organic compounds such as citric acid, formic acid and hydrazine were used, which are acts as reducing agent for Cu. The catalysts were characterized by various physicochemical methods such as XRD, XRF, TPR, HRTEM, XPS, FESEM and N2-physisorption. Citric acid resulted Cu(111) nanoparticles with higher surface area and better dispersion on the surface of mixed oxides. The catalysts were used for the selective hydrogenation of furfural to furfuryl alcohol under vapor phase conditions. Among the various catalysts studied, Citric acid assisted catalyst showed better conversion with higher selectivity of desired product and deactivation free catalytic activity on stream more than 30h.

    更新日期:2018-01-15
  • Development of a DEM-VOF model for the turbulent free-surface flows with particles and its application to stirred mixing system
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-15
    liang wu, Ming Gong, Jingtao Wang

    The free-surface flows with particles are widely found in chemical engineering, and numerical modeling is a powerful tool to gain insight into local and macroscopic properties for the design and optimization of operating conditions. In this work, a DEM-VOF model is extended to turbulent free-surface flows with particles, by means of Reynolds stress model (RSM). Besides, we adopt a novel virtual dual-grid porosity model to calculate the fluid porosity. The simulated results of single particle sedimentation, the falling of sinking particles and the floating of buoyant particles agree well to analytical and literatures, which validate the proposed DEM-VOF model. Furthermore, the proposed DEM-VOF model is firstly involved to simulate the free-surface flows with particles in solid-liquid mixing system. It is found that elliptical-head vessel is preferred to a flat-bottomed vessel for solid–liquid mixing by comparing the simulation results of four different stirred tanks, which agrees well to the related content of the book “Handbook of Industrial Mixing”.

    更新日期:2018-01-15
  • Gas flow in a multiliquid-inlet rotating packed bed: 3D numerical simulation and internal optimization
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-15
    Wei Wu, Yong Luo, Guang-Wen Chu, Yi Liu, Haikui Zou, Jian-Feng Chen

    A novel multiliquid-inlet rotating packed bed (MLI-RPB) has been demonstrated to be a higher gas-liquid mass transfer reactor in our previous studies (Ind. Eng. Chem. Res. 2014, 53, 18580-18584), compared to the conventional RPB. Comprehensive understanding the fluid flow inside the MLI-RPB is significant for the internal optimization. In this work, the gas flow in a MLI-RPB was investigated by the three-dimensional computational fluid dynamics simulation. The simulated gas pressure drop was validated by the experimental data, within a deviation of ±15%. Simulation results reveal that the MLI-RPB has special features in the hollow annular zones among packing rings. Five types of internal combinations were designed to improve the turbulence of the gas flow in the hollow annular zones. The tangential slip velocity, turbulence kinetic energy, ratio of turbulence kinetic energy and overall gas pressure drop of the MLI-RPB with these internal combinations were 1~2, 1~4, and 1~4 times the original MLI-RPB, respectively.

    更新日期:2018-01-15
  • Thiodiphenol-Based n-Dialkylamino Extractants for Selective Platinum Group Metal Separation from Automotive Catalysts
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-15
    Manabu Yamada, Muniyappan Rajiv Gandhi, Yu Kaneta, Nozomi Kimura, Hiroshi Katagiri

    Five kinds of dialkylamino-modified thiodiphenols (2‒6) were synthesized to elucidate the extraction of Pd(II) and Pt(IV) in HCl media by thiodiphenol-based n-dialkylamino extractants. Although the synthesized species 2‒6 showed good solubility in hydrocarbon-based diluents such as kerosene, ShellSol D70, and ISOPER M, the addition of n-octanol to the platinum group metals (PGMs) extraction was needed to inhibit third layer formation. All the 2‒6 extract Pd(II) and Pt(IV) were much more effective than the commercial extractants, 2-hydroxy-5-nonylacetophenone oxime (LIX84-I), tri-n-butylphosphate (TBP), and tri-n-octylamine (TOA). Increasing the hydrophobicity of the extractants by increasing the alkyl chain length had an effect on the Pd(II), Pt(IV), and Rh(III) extractabilities, which increased in the order from 2 to 6. Extractant 6 could also be used for the selective extraction of Pd(II) and Pt(IV) (E% > 99%) from the leach liquors of automotive catalysts containing Pd(II), Pt(IV), Rh(III), La(III), Ce(III), Y(III), Zr(IV), Ba(II), and Al(III) in HCl media. The effective stripping of Pd(II) and Pt(IV) was achieved from an extracted organic phase containing 6 using 0.5 M thiourea in 1.0 M HCl. In addition, 6 was reusable and exhibited a high E% for Pd(II) and Pt(IV) (>96%) after five extraction cycles, indicating potential usefulness for the selective recovery of Pd(II) and Pt(IV) from leachates in platinum group metal refineries.

    更新日期:2018-01-15
  • Synthesis of SAPO-34@ZSM-5 and SAPO-34@Silicalite-1 Core-Shell Zeolite Composites for Ethanol Dehydration
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-15
    Xin Li, Fateme Rezaei, DOUGLAS K. LUDLOW, Ali Asghar Rownaghi

    Herein, we report the synthesis of zeolite composites with core-shell structure via a secondary growth technique and evaluation of their catalytic performance in ethanol dehydration. In particular, SAPO-34 particles were functionalized by TPA+, followed by dispersion in ZMS-5 or silicalite-1 to from SAPO-34@ZSM-5 and SAPO-34 silicalite-1 composites. The novel core-shell materials showed a hierarchical porous structure consisting of both micropores and mesopores. The active sites in the developed composites were found to have a mild acidity. Compared to conventional zeolite catalysts in ethanol dehydration reaction, the core-shell SAPO-34@ZSM-5 improved the selectivity towards light olefins. In addition, our catalyst test results revealed the enhancement in propylene and ethylene yield over SAPO-34@ZSM-5 and SAPO-34@siliclite-1, respectively, as compared with bare SAPO-34. An improved catalyst stability was also obtained for the composite materials owing to their core-shell structure. The improved catalytic performance reported in this study reveals the potential utility of the zeolite composites with core-shell structure in ethanol dehydration reaction.

    更新日期:2018-01-15
  • Mechanism of influence of Organic Impurity on Crystallization of Sodium Sulfate
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-13
    Nannan Su, Yongli Wang, Yan Xiao, Haijiao Lu, Yajing Lou, Jingjing Huang, Meng He, Yang Li, Hongxun Hao

    To promote the development of crystallization technology for recovering salt from high salinity wastewater, the effect of organic impurity on crystallization of sodium sulfate was investigated by using phenol as representative organic impurity. The effect of phenol on crystallization thermodynamics of sodium sulfate was evaluated by measuring solubility data of sodium sulfate in water in presence of phenol. It was found that the existence of phenol could suppress the solubility of sodium sulfate in water. The effect of organic impurity on crystal nucleation was performed by measuring the metastable zone width (MSZW) and induction time of sodium sulfate. Two models (Self-consistent Nývlt-like equation and Classical 3D nucleation theory) were used to analyze the experimental data. It was found that Classical 3D nucleation theory (3D CNT) can better explain the effect of phenol on nucleation. From both MSZW data and induction time data, it was found that the existence of phenol will apparently increase the interfacial energy γ, which will result in higher nucleation Gibbs energy barrier and thus lower nucleation rate. Furthermore, the existence of phenol will increase the critical nucleus radius r* and the critical Gibbs energy ΔG*, which means that the formation of the nuclei will be more difficult in the presence of phenol. According to the above analysis, the possible mechanism of influence of organic impurity on crystallization of sodium sulfate was proposed.

    更新日期:2018-01-13
  • A Robust Engineering Strategy for Scheduling Optimization of Refinery Fuel Gas System
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Gang Rong, Yi Zhang, Jiandong Zhang, Zuwei Liao, Hao Zhao

    As a byproduct of the oil refining process, fuel gas is the primary energy source of refineries. Considering self-generated and purchased fuel gas simultaneously in an optimization model will cut down energy cost and reduce carbon emissions in oil refineries. A mixed-integer linear program (MILP) has been built in our previous work. However, due to the fluctuation in the fuel gas generation and consumption, theoretical scheduling solutions may become infeasible or inaccurate. This paper presents a robust engineering strategy for validating the model to variable conditions in four aspects: model precision, solving performance, optimization effect, and execution. The proposed strategy has been applied to a fuel gas system in one of the largest oil refineries (LRF) in China to ensure model feasibility, necessity, and effectiveness. The implementation results show that the proposed method reduces costs up to 5.63% through the single-period operational optimization and up to 7.76% in the multi-period scheduling.

    更新日期:2018-01-13
  • An enhanced stage-wise superstructure for heat exchanger networks synthesis with new options for heaters and coolers placement
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    L. V. Pavão, Caliane Bastos Borba Costa, Mauro Ravagnani

    Several methods for heat exchanger networks (HEN) design are based on the use of superstructures. The models they give rise to can lead to different design options to be explored in HEN synthesis. In this work, a stage-wise superstructure with new features for the optimal placement of heaters and coolers, including the possibility of the use of multiple utilities, is presented. In the model, those units can be placed in different stream split branches in all stages, differing from the usual allocation at stream ends. Such possibilities yield a more complex mathematical model. To solve it, an improved version of a previously presented hybrid meta-heuristic method was used. Three examples from the literature were studied. The use of the superstructure with the additional utility-related options, as well as the enhanced meta-heuristic solution method, led to configurations with lower associated total annual costs than those reported in previous works.

    更新日期:2018-01-13
  • Manufacturing Ethylene from Wet Shale Gas and Biomass: Comparative Techno-economic Analysis and Environmental Life Cycle Assessment
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Minbo Yang, Xueyu Tian, Fengqi You

    This paper presents comparative techno-economic and environmental analyses of three ethylene manufacturing pathways based on ethane-rich shale gas, corn stover, and corn grain. The shale gas-based pathway includes two processing steps, namely shale gas processing to produce ethane and ethane steam cracking to manufacture ethylene. The two biomass-based pathways also contain two processing steps each, namely bioethanol production via fermentation and ethylene manufacturing via bioethanol dehydration. A distributed-centralized processing network that consists of distributed ethane/bioethanol production and centralized ethylene manufacturing is employed for each of the three pathways. Detailed process simulation models are developed for major processing steps, and the three pathways are then modeled on five different ethylene production scales. Based on the detailed mass and energy balances and life cycle inventory results, we conduct techno-economic and life cycle analyses to systematically compare the economic and environmental performances of the three ethylene manufacturing pathways. The results indicate that the shale gas-based pathway is the most attractive due to the lowest breakeven ethylene prices ($0.32/kg~$1.67/kg); however, it leads to the highest greenhouse gas emissions of about 1.4 kg CO2-eq/kg ethylene. On the contrary, the corn stover-based pathway results in the lowest greenhouse gas emissions of around −1.0 kg CO2-eq/kg ethylene but the highest breakeven ethylene prices ($2.0/kg~$4.1/kg). Sensitivity analyses are performed to systematically investigate the influences of parameter deviations on the economic and environmental performances of the three ethylene manufacturing pathways.

    更新日期:2018-01-13
  • Quantitative Study on Dissolution Behavior of Nd2O3 in Fluoride Melts
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Xiaoling Guo, Zhi H.I. Sun, Jilt Sietsma, Bart Blanpain, Muxing Guo, Yongxiang Yang

    The dissolution of rare earth oxides in molten fluorides is a critical step in the preparation of the corresponding rare earth metals by oxide-fluoride electrolysis. However, quantitatively understanding the nature of dissolution especially in the case of molten salts is usually difficult to be achieved by post-mortem characterization. In this paper, the dissolution behavior of Nd2O3 particles in molten fluorides was studied via in-situ observation with a confocal scanning laser microscopy. Combining direct observation with thermodynamic analyses on the oxide dissolution, the rate-limiting step(s) and the effects of parameters like temperature, salt type and composition on the dissolution rate are identified. This study provides a methodology to estimate the dissolution kinetics of rare earth oxides in molten fluorides during their primary and secondary processing.

    更新日期:2018-01-13
  • An improved targeting procedure to determine the indirect inter-plant heat integration with parallel connection pattern among three plants
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Runrun Song, Yufei Wang, Marc Panu, Mahmoud M El-Halwagi, Xiao Feng

    The inter-plant heat integration (IPHI) problem has received growing interest for its potential to reduce energy consumption and emissions beyond heat integration within individual plants. Indirect IPHI using an intermediate energy carrier (intermedium) allows for practical implementation as opposed to direct IPHI, which may consist of multiple piping loops using process streams. Various inter-plant connection patterns of intermedium loops present differences in inter-plant heat recovery potential, pipeline costs and the reliability of IPHI system. This work addresses the parallel connection pattern for it presents the maximum inter-plant heat recovery potential and is a flexible pattern. An improved targeting procedure is proposed to determine the parallel connection pattern. This method can determine the real maximum inter-plant heat recovery potential for indirect IPHI among three plants and simultaneously minimize the corresponding intermedium flowrates. Two examples from prior literatures, as well as the modified cases, are solved to demonstrate the proposed method. The proposed method can always present multiple feasible solutions for IPHI problems. Compared with the previous results for the certain case, under the same inter-plant heat recovery potential, a better solution in terms of the overall intermedium flowrate and/or the number of heat exchanger used can be found from all the feasible ones.

    更新日期:2018-01-13
  • Simple monitoring of fine chemical runaway reactions in multipurpose plants: the nitration of 2,4-dichloro benzotrifluoride
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Francesco Maestri, Stefano Curti, Renato Rota

    In the fine chemical industry new production processes are often implemented in multipurpose existing plants with minimum adaptation investments. When the new process involves a potential runaway reaction, a full thermodynamic and kinetic characterization of the system should be performed to evaluate whether the reaction can be safely scaled-up in the selected plant. However, a detailed kinetic characterization is often unsuited because of the huge development rate of new products. In this work a potential runaway reaction of the agrochemical industry, that is, the nitration of 2,4-dichloro benzotrifluoride through mixed acids, is investigated with the aim of implementing it with a minimum experimental effort in an existing plant already dedicated to a similar reaction, that is, the nitration of 4-chloro benzotrifluoride. It has been shown that, even performing very similar reactions, the  number criterion cannot be implemented in a univocal way to monitor the multipurpose SBR operation. Such a goal can instead be reached through the general procedure based on the , X and MTSRad set of process indicators, which was previously applied to the monitoring of polymerization processes.

    更新日期:2018-01-13
  • H3PW12O40 Grafted on CeO2: A High-Performance Catalyst for the Selective Catalytic Reduction of NOx with NH3
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Yang Geng, Shangchao Xiong, Bo Li, Yong Liao, Xin Xiao, Shijian Yang
    更新日期:2018-01-12
  • Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property Methods
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    V. R. Ferro, C. Moya, D. Moreno, R. Santiago, J. de Riva, G. Pedrosa, M. Larriba, I. Diaz, J. Palomar
    更新日期:2018-01-12
  • Kinetic Model for the Conversion of Chloromethane into Hydrocarbons over a HZSM-5 Zeolite Catalyst
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Monica Gamero, Beatriz Valle, Ana G. Gayubo, Pedro Castaño, Andres T. Aguayo, Javier Bilbao
    更新日期:2018-01-12
  • High Spin State Promotes Water Oxidation Catalysis at Neutral pH in Spinel Cobalt Oxide
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-12
    Lin Ma, Sung-Fu Hung, Liping Zhang, Weizheng Cai, Hong bin Yang, Hao Ming Chen, Bin Liu

    In this work, we present Co3O4 quantum dots (QDs) as a highly efficient and stable oxygen evolution reaction (OER) catalyst at neutral pH. The Co3O4 QDs with a mean size of 5 nm were synthesized by reacting cobalt acetate with benzyl alcohol in the presence of ammonia under reflux conditions. The as-synthesized Co3O4 QDs show extraordinary water oxidation activity with onset overpotential as low as 398 mV and mass activity as high as 567 A/g (at 1.75 V vs RHE) in a 0.2 M phosphate buffer electrolyte (pH ~ 7), which are among the most efficient earth-abundant OER catalysts at neutral pH reported in the literature, reaching a stable current density of 10 mA/cm2 at an overpotential of ~ 490 mV with a Tafel slope of 80 mV/decade. Through in-depth investigations by X-ray photoelectron spectroscopy and X-ray absorption spectroscopy, the high spin Co2+ and Co3+ cations on the surface of Co3O4 QDs were found to be important to promote the OER kinetics at neutral pH.

    更新日期:2018-01-12
  • Effects of Doping Rare Earth Elements (Y, La, and Ce) on Catalytic Performances of CoMo/MgAlM for Water Gas Shift Reaction
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Jinxing Mi, Yanning Cao, Jincheng Zhang, Chongqi Chen, Dalin Li, Xingyi Lin, Jianjun Chen, Lilong Jiang
    更新日期:2018-01-12
  • Controllability Evaluation for Reactive Distillation Columns with Multiple Reactive Sections Disproportionating Trichlorosilane to Silane
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Kejin Huang, Yang Yuan, Xinxiang Zang, Haisheng Chen, Liang Zhang, Xing Qian, Shaofeng Wang
    更新日期:2018-01-12
  • 更新日期:2018-01-12
  • Midinfrared Spectroscopy and Partial Least-Squares Model as an Analytical Method for Biodiesel and Glycerol Monitoring
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Maiquel Bonato, Alexsandra Valério, J. Vladimir Oliveira, Débora de Oliveira, Ariovaldo Bolzan
    更新日期:2018-01-12
  • CoatAlloy Barrier Coating for Reduced Coke Formation in Steam Cracking Reactors: Experimental Validation and Simulations
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Natália Olahová, Steffen H. Symoens, Marko R. Djokic, Nenad D. Ristic, Stamatis A. Sarris, Mathieu Couvrat, Fanny Riallant, Hugues Chasselin, Marie-Françoise Reyniers, Kevin M. Van Geem
    更新日期:2018-01-12
  • Fluidized-Bed Isobutane Dehydrogenation over Alumina-Supported Ga2O3 and Ga2O3–Cr2O3 Catalysts
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Anna N. Matveyeva, Nadezhda A. Zaitseva, Päivi Mäki-Arvela, Atte Aho, Anastasia K. Bachina, Sergey P. Fedorov, Dmitry Yu. Murzin, Nikolai A. Pakhomov
    更新日期:2018-01-12
  • Deposition of Dispersed Nano-Particles in Porous Media Similar to Oil Sands. Effect of Temperature and Residence time
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Victor M Rodriguez-DeVecchis, Lante Antonio Carbognani Ortega, Carlos E. Scott, Pedro Rafael Pereira-Almao

    The use of nano-particles for a wide variety of purposes is attracting much interest among large oil producers. Technologies that intend to adsorb noxious components, or to modify flow patterns to enhance oil recovery or to upgrade the oil in place before pipelining are being subject to significant consideration with high potential to impact in the environmental and economic performance of this industry. A key aspect for chemical processes targeting the construction of adsorbers or reaction zones in the reservoir strides in the particles retention in the porous medium zone of interest, especially when a temperature above the one in the reservoir is applied. This work addresses the effect of different operation variables in the nano-particle deposition process. Of great importance is not only the amount of particles retained but also the profile, morphology, dispersion and penetration in the porous medium. A Ni-Mo-W dispersed nano-particulate was evaluated. The deposition process was conducted at moderate conditions of temperature and residence time. During this process, retention of naturally occurring metals, mainly vanadium, in the bitumen was found to be in the low range of 25-70ppm wt. High particle retention, over 95%, was obtained in every case, with no observable effect on the sandpack’s oil permeability. The analysis of particle size distributions before and after passing through the sand pack was shown to have no significant variation. The concentration profiles along the porous media are similar for all experimental conditions investigated with around 30% of nanoparticles depositing at the entrance of the media. Correlations for the profile and cumulative concentration along the porous media core are proposed. Particles were identified and measured by Scanning Electron Microscopy- Energy Dispersion X-ray Analysis (SEM-EDX) along the full length of the porous media core in each case. Low temperature deposition test runs showed particles deposited as large agglomerates all along the porous medium, while for high temperature deposition test runs, individually deposited particles were observed.

    更新日期:2018-01-12
  • Effects of Zeolitic Parameters and Irradiation on the Retention Properties of Silver Zeolites Exposed to Molecular Iodine
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Bruno Azambre, Mouheb Chebbi, Olivia Leroy, Laurent Cantrel

    In this study, we have investigated the iodine retention behavior of silver zeolite sorbents under a variety of conditions. First, a preliminary study was achieved in liquid phase in order to determine: (i) the main kinetic and thermodynamic characteristics pertaining to the adsorption behavior; (ii) the influence of some zeolitic parameters (nature of the framework, silver content, preparation method…) on the adsorption capacities. Thanks to the on-line monitoring of gas-phase I2 concentrations by UV-Vis spectroscopy, the iodine dynamic adsorption/desorption behavior of some selected sorbents was then studied at 100°C. It was found that faujasite sorbents with silver content higher than 20 wt% could maintain a high working capacity (up to 330 mg/g) and present a high ability for irreversible trapping. Finally, the stability of trapped iodine species was studied using additional tests performed at 120°C in presence of irradiation and humidity.

    更新日期:2018-01-12
  • Task-specific ionic liquids as extractants for the solvent extraction of molybdenum (VI) from aqueous solution using different commercial ionic liquids as diluents
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-01-11
    Esteban Quijada-Maldonado, Felipe Sanchez, Barbara Perez, Ricardo Apati Tapia, Julio Romero

    In this work, the recovery of molybdenum (VI) (Mo) from aqueous solutions was carried out by solvent extraction (SX) using ammonium and phosphonium-based task-specific ionic liquids (TSILs) as extractants diluted in kerosene and two other hydrophobic room temperature ionic liquids (RTILs). Four different TSILs were used as extractants: trioctyl methyl ammonium bis-(2-ethylhexyl) phosphate [TOMA][D2EHP]; trioctyl methyl ammonium benzoate [TOMA][BA]; trihexyltetradecylphosphonium bis-(2-ethylhexyl) phosphate [P6,6,6,14][D2EHP]; and trihexyltetradecylphosphonium benzoate [P6,6,6,14][BA]. These TSILs were synthetized to assess the effect of the cation and anion on the SX of Mo(VI). Experimental results indicated that high extraction percentages of Mo(VI) were obtained with all the synthetized TSILs. Besides that, the best cation was [TOMA]+ for all the diluents and [BA]- was the best anion when kerosene and 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [omim][Tf2N] were the diluents. Furthermore, the SX process using these ionic liquids followed a solvation mechanism and ion exchange for kerosene and [omim][Tf2N] as diluents, respectively. Finally, the stripping was successfully performed with a solution of ammonium carbonate, and the extent of stripping depended on the selected diluent.

    更新日期:2018-01-12
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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