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  • Feasibility Evaluation of a Novel Middle Vapor Recompression Distillation Column
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-20
    Haifeng Cong, Jaden Patrick Murphy, Xingang Li, Hong Li, Xin Gao
    更新日期:2018-04-20
  • Heat and mass transport characteristics of pressure swing adsorption for the removal of high-level moisture along with CO2 from air
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-20
    Yun Fei Shi, Xiang Jun Liu

    High-level moisture removal is often encountered in the pressure swing adsorption (PSA) for air prepurification. The effects of high-concentration water vapor adsorption on the heat and mass transport characteristics of PSA should be described in detail for further design and optimization of air prepurification processes. In this work, a mathematical model of an alumina/13X-layered two-bed Skarstrom-type PSA cycle for the removal of high-level moisture along with CO2 from air is established to study the heat and mass transport characteristics during the process. The maximum increase and decrease in temperature are related to the water vapor concentration in the feed air, and two simplified formulas are proposed to estimate their magnitudes. The mass transport characteristics, especially the penetration depths of the two impurities, are examined under different inlet temperatures, adsorption pressures, purge-to-adsorption flow rate ratios, inlet flow rates, and cycle times. A relation between the penetration depth of water vapor and the five operating parameters is developed and can be readily used to predict the location of the water vapor adsorption front in the PSA design for air prepurification and other purification processes involving high-level moisture.

    更新日期:2018-04-20
  • Nanoclay-Based PVA Aerogels: Synthesis and Characterization
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    Carolina Simón-Herrero, Laura Gómez, Amaya Romero, José L. Valverde, Luz Sánchez-Silva
    更新日期:2018-04-20
  • Reaction conversion for a plasma-based steady-state flow process is independent of reactor volume
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    Joseph Robert Toth, Xiaozhou Shen, Daniel J Lacks, R. Mohan Sankaran

    Electrical discharges in gases or plasmas allow dissociation and conversion of molecular precursors such as methane at relatively low temperature. In a steady-state reactor geometry, the reaction conversion has been suggested to depend on basic process parameters such as residence time, which in turn is a function of reaction volume and gas flow rate similar to other steady-state chemical reactors, and power. Here, we show through a combined experimental and modeling study that for a plasma-based steady-state reactor, conversion depends only on gas flow rate and power and is independent of reaction volume. A critical part of the experiments was to confine the reaction volume so that the power and volume could be independently controlled, and a critical part of the modeling was to segment the reactor into a volume containing filamentary discharges and a volume containing an afterglow to capture the spatial heterogeneity of our dielectric barrier discharge. The resulting similarity law for the conversion is consistent with the idea of energy density for a plasma process, but shows how such a reaction scheme is distinct from other chemical approaches.

    更新日期:2018-04-20
  • Efficient Removal of Pb2+ from Aqueous Solution by an Ionic Covalent Organic Framework: A Molecular Simulation Study
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    Krishna M. Gupta, Kang Zhang, Jianwen Jiang

    An ionic covalent-organic framework (ICOF-1) is explored as an ion exchanger for the removal of lead (Pb2+) ions from aqueous solution. From molecular simulations, the Pb2+ ions are observed to exchange with the nonframework dimethylammonium (DMA+) ions in the ICOF-1. At a concentration of 600 ppm, the Pb2+ ions are completely exchanged and reside in the ICOF-1, while the DMA+ ions are in a dynamic equilibrium with the solution. It is revealed that the exchange between Pb2+ and DMA+ is governed by the stronger attraction of Pb2+ with the negatively charged ICOF-1 framework. The radial distribution functions and mean-squared displacements further show that the exchanged Pb2+ ions are in a closer proximity to the ICOF-1 framework with a smaller mobility than DMA+ ions. The simulation study provides microscopic insight into the ion exchange process between Pb2+ and DMA+, and it suggests that the ICOF-1 might be an intriguing candidate for water purification.

    更新日期:2018-04-20
  • Comments on the artificiality of actual amount adsorbed
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    Shivaji Sircar

    Abstract: The artificiality of the actual amount adsorbed (AAA) estimated from the experimentally measured Gibbsian Surface Excess (GSE) of a gas is discussed. The use of AAA for calculation of isosteric heat of adsorption or mixed gas adsorption isotherms using Ideal Adsorbed Solution Theory can be misleading and incorrect. The GSE, on the other hand, can be unambiguously used to describe all practical aspects of adsorption science and technology.

    更新日期:2018-04-20
  • Coloured poly(vinyl chloride) (PVC) by femtosecond laser machining
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    K. M. Tanvir Ahmmed, Roozbeh Mafi, Anne-Marie Kietzig

    Coloured poly(vinyl chloride) (PVC) was fabricated by femtosecond laser micromachining without the addition of chemical colourants, eliminating the concern of leaching dyes and pigments. We determined that the changes in surface chemistry and surface topography both contribute to the observed yellow, brown, and black colour formation. X-ray photoelectron spectroscopy (XPS) on the machined samples showed that conjugated double bonds are liable for the yellow and brown colour, whereas the presence of oxidised carbon and surface topography contribute to the black colour. Fourier Transform Infrared Spectroscopy (FTIR) indicated that laser irradiation altered the material’s properties only near the surface which left the bulk properties unaltered. Furthermore, chemical resistance tests showed that some of the samples were able to withstand the influence of aggressive chemicals and their colour did not fade. Finally, we showed that the fabrication of coloured PVC highly depends on its ablation energy threshold which is affected by the laser pulse duration and wavelength.

    更新日期:2018-04-19
  • Hierarchical NiO@NiCo2O4 core–shell nanosheet arrays on Ni foam for high-performance electrochemical supercapacitors
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    Di Yao, Yu Ouyang, Xinyan Jiao, Haitao Ye, Wu Lei, Xifeng Xia, Lei Lu, Qingli Hao

    A facile solvothermal method followed by a post-annealing process is used to prepare NiO@NiCo2O4 core–shell nanosheet arrays supported on Ni foam substrate for a high-performance supercapacitor. The hybrid electrode possesses a three-dimensional structure with the ‘shell’ of NiCo2O4 nanoflakes anchored on the ‘core’ of ordered NiO nanosheets. It shows high specific capacitance of 1623.6 F g-1 (or specific capacity of 225.5 mAh g-1) at 2 A g-1 and excellent rate performance with a 96% capacitance retention rate at 20 A g-1. The high cycling stability is proved by nearly 90% capacitance retention at 10 A g-1 after 10000 cycles. Its asymmetric supercapacitor, assembled with NiO@NiCo2O4/Ni foam and the activated carbon/Ni foam as the positive and negative electrode, respectively, displays the specific energy of 52.5 W h kg-1 at 387.5 W kg-1. The excellent electrochemical performance of NiO@NiCo2O4 electrode indicates its great potential in applications of energy storage devices.

    更新日期:2018-04-19
  • Tribological Study of SOCNTs@MoS2 Composite as a Lubricant Additive: Synergistic Effect
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-19
    Wei Song, jincan Yan, Hongbing Ji

    Different layers of MoS2 were grown on the surface of carbon nanotubes (CNTs) successfully with a facile and effective chemical vapor deposition method. The pristine CNTs (PCNTs) were pre-treated with 5mol•L-1 HNO3, 10mol•L-1 HNO3 and mixed acid (sulfuric acid: nitric acid=3:1) to obtain weakly oxidized CNTs (WOCNTs), moderately oxidized CNTs (MOCNTs) and strongly oxidized CNTs (SOCNTs). According to the results of SEM, EDS, TEM, Raman, XRD and XPS, more layers of MoS2 were grown on the surface of SOCNTs uniformly due to the abundant defects on its surface. The friction-reducing and anti-wear performance of dibutyl phthalate (DBP) containing SOCNTs, MoS2, SOCNTs/MoS2 mixture and SOCNTs@MoS2 composite were investigated under 392N, 1200rpm at room temperature by four-ball tribotester. The DBP containing 0.02 wt % SOCNTs@MoS2 composite exhibited the best tribological performance, and the friction coefficient and wear scar diameter (WSD) were reduced by 57.93% and 19.08% respectively. The synergistic effect between SOCNTs and MoS2 was further explored by comparing the lubricant mechanism of the different additives. A possible mechanism was proposed, and the SOCNTs@MoS2 composite can be deposited on the rubbing surface due to the microstructure and translated into tribo-film which can protect the friction pair.

    更新日期:2018-04-19
  • Calcined MgAl-Layered Double Hydroxide/Graphene Hybrids for Capacitive Deionization
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Qidi Ren, Gang Wang, Tingting Wu, Xin He, Jianren Wang, Juan Yang, Chang Yu, Jieshan Qiu
    更新日期:2018-04-19
  • 更新日期:2018-04-19
  • Data driven modeling using optimal principle component analysis based neural network and its application to nonlinear coke furnace
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Ridong Zhang, qiang lv, Jili Tao, Furong Gao

    In order to fully exploit the data information among process variables, an optimization based principle component analysis (PCA) using a neural network is proposed. Firstly, a new RV similarity criterion of PCA variable selection method is developed to select the main variables and construct the nonlinear industrial process. Secondly, a radial basis function neural network (RBFNN) is utilized to construct the nonlinear process model, where the modeling accuracy and RV criterion are optimized by an improved multi-objective evolutionary algorithm, namely, NSGA-II. To obtain the optimization of the structure and parameter of the RBFNN, encoding, prolong and pruning operators are designed. The RBFNN with good generalization capability will then be obtained based on root mean squared error of the training and testing data considering the Pareto optimal solutions. The proposed approach has efficiently selected the main disturbance of the chamber pressure control loop in a coke furnace and the RBFNN has obtained satisfactory data extraction accuracy compared with the other three typical methods.

    更新日期:2018-04-19
  • The competition between supramolecular interaction and protein-protein interaction in protein crystallization: Effects of crystallization method and small molecular bridge
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Rongting Hu, Guang Yang, Hong-ming Ding, Jinbiao Ma, Yu-qiang Ma, Jianhua Gan, Guosong Chen

    Different protein crystalline frameworks packing through supramolecular interactions and protein-protein interactions are attractive for biotechnological and nanotechnological studies. Here we present that the variant protein-packing frameworks of concanavalin A (ConA) binding with ligands might be controlled by different crystallization methods, furthermore, the protein crystalline frameworks could be also controlled by small-molecule inducing ligands RnM (n = 1, 2, 3, 4, 5) with varying spacer lengths of ethylene oxide repeating units. To properly understand the mechanism of different packing frameworks controlled by inducing ligands, all-atom molecular dynamic (MD) simulations investigated the dimerization behavior of ConA-RnM systems to present the clear relationships between the inducing ligands and ConA. In short, besides protein-packing frameworks controlling via different crystallization methods, the inducing ligands RnM with suitable spacer lengths (n = 3, 4) also play an important role in desired and stable crystalline frameworks.

    更新日期:2018-04-19
  • 更新日期:2018-04-18
  • Degradation of Amine Solvents in a CO2 Capture Plant at Lab-Scale: Experiments and Modeling
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Serena Delgado, Benoît Valentin, Domitille Bontemps, Olivier Authier
    更新日期:2018-04-18
  • Advancement in photothermal effect of carbon nanotubes by grafting of poly(amidoamine) and deposition of CdS nanocrystallites
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Gururaj M. Neelgund, Aderemi Oki

    A robust, near-infrared (NIR) active photothermal agent, CNTs-PAMAM/G4-CdS is designed by covalent grafting of fourth generation poly(amidoamine) (PAMAM) to carbon nanotubes (CNTs) and successive deposition of CdS nanocrystallites. The systematic advancement in photothermal effect of CNTs was achieved by grafting of 1st, 2nd, 3rd and 4th generation PAMAM through repeated process of Michael’s addition. The subsequent deposition of CdS nanocrystallites over 4th generation PAMAM grafted CNTs has further improved the photothermal effect (PTE) of CNTs. The photothermal effect of CNTs-PAMAM/G4-CdS was accessed by illuminating with 980 nm NIR laser. During measurement of PTE, maximum temperature attained by CNTs-PAMAM/G4-CdS was 64.1 C which is far exceeds the survival temperature of cancer cells. The photothermal conversion efficiency estimated for CNTs-PAMAM/G4-CdS was 32%, which is higher than the value reported for popular gold and copper based photothermal agents. Apart from its outstanding photothermal effect, CNTs-PAMAM/G4-CdS possessed the excellence in both antiphoto-bleaching and antiphoto-corrosiveness.

    更新日期:2018-04-18
  • Determination of inter-fiber bonded area based on the Confocal Laser Scanning Microscopy technique
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Hailong Li, Hongjie Zhang, Fengshan Zhang, Xiaoliang Li, Sarah Catherine Legere, Yonghao Ni

    Inter-fiber bonding is a critical parameter for the strength properties of cellulosic material. In this study, the Confocal Laser Scanning Microscopy (CLSM) was applied to determine the inter-fiber bonded area of lignocellulosic fibers. Based on its unique features of optical sectioning, a series of 2D images were obtained. The optically bonded area, which does not include the unbonded area, and the overlapped area were estimated. The bonding ratio of the inter-fiber network, defined as the optically bonded area to the total overlapped area, was also estimated. Furthermore, the 3D-image reconstructions of the inter-fiber bonded model were established. The developed CLSM technique was applied to a poplar high-yield pulp sample.unbonded area, and the overlapped area were estimated. The bonding ratio of the inter-fiber network, defined as the actual bonded area to the total overlapped area, was also estimated. Furthermore, the three directional views and 3D-image reconstructions of the inter-fiber bonding model were established. The developed CLSM technique was applied to a popular high-yield pulp sample.

    更新日期:2018-04-18
  • Room temperature synthesis of magnetic metal-organic frameworks composites in water for efficient removal of methylene blue and As(V)
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Lijin Huang, Jiayu Cai, Man He, Beibei Chen, Bin Hu

    Magnetic metal-organic framework composites (MFCs) were prepared in water under room temperature through a simple, low-cost and green strategy only by employing organic salts as anionic linker sources. Amino-functionalized MFCs (MFC-N) with different amino group content were successfully prepared by varying the ratio of disodium of 2-aminoterephthalic (NH2-Na2BDC)/terephthalic acid (Na2BDC). The prepared nanoscale MFC-N-X (X represents the percentage of NH2-Na2BDC, i.e. X=0, 50, 100) showed high surface area, large pore volume, excellent magnetic response, as well as good water and thermal stability. Among these prepared MFC-N-X, MFC-N-100 exhibited the highest adsorption capacity of 358 mg g-1 for methylene blue (MB) and 71 mg g-1 for As(V) due to its porous structure and abundant amino groups. The prepared MFC-N-100 was successfully applied to remove MB and As(V) from different water samples (tap water, lake water and domestic sewage) with a high removal efficiency and a rapid separation of the sorbent from solution, demonstrating the great application potential of the prepared MFC-N-100 as a fascinating adsorbent for removal of dyes or metal ions from different water samples.

    更新日期:2018-04-18
  • Simultaneous Removal of COS, H2S and Dust in Industrial Exhaust Gas by DC Corona Discharge Plasma
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Langlang Wang, Xue Qian Wang, Ping Ning, Chen Cheng, Yixing Ma, Ran Zhang

    Simultaneous removal of COS, H2S and dust by means of DC corona discharge plasma was investigated in a plasma reactor. The results showed that the DC corona discharge was effective in removing COS, H2S and dust simultaneously. As the content of O2 increased, the conversion of COS and H2S decreased. Because O3 was produced at high O2 content, resulting in more energy was shared. Higher temperature is not conducive to the conversion of COS and H2S. Dust could react with gaseous pollutant or serve as a carrier under the electric field. The conversion of COS and H2S, as well as the yield of CO2, were slightly improved after the dust was introduced. In contrast, a significant decrease about the yield of SO2 and CO was observed. Meanwhile, the removal efficiency of dust reached 99%. In a plasma reactor, the chemical bonds of COS and H2S were broken and then further oxidized to sulfur-containing and carbon-containing products caused by free electrons, oxygen radicals and ozone. The CO and CO2 product were generated from the COS, and sulfur compounds (S, SO2, SO42-) were resulted from the oxidization of COS and H2S. Free electrons and oxidative radicals might played more significant roles in the conversion of COS and H2S.

    更新日期:2018-04-18
  • Crystallization of Green Poly(ε-caprolactone) Nanocomposites with Starch Nanocrystal: The Nucleation Role Switching of Starch Nanocrystal with Its Surface Acetylation
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Guorui Zhang, Chunjiang Xu, Defeng Wu, Wenyuan Xie, Zhifeng Wang

    Poly(ε-caprolactone) (PCL) was filled with very small amount of starch nanocrystals (SNC), with the objective to control its crystallization. Three kinds of SNC particles, including the pristine one and the acetylated ones with low-level and middle-level substitutions, were used. Their roles acted during PCL crystallization were studied, then. The results reveal that pristine SNC acts as the nucleating agent, increasing crystallization temperature and spherulite growth rate evidently. However, nucleation activity of SNC particles reduces with their increasing level of surface acetylation. The middle-level-acetylated SNC particles even act as the role of antinucleation agent, impeding nucleation and followed spherulite growth of PCL. The phase affinity in those systems was then evaluated by the interaction energy parameter, aiming at better understanding the mechanism of role alterations of SNC particles. This work provides an interesting way to control PCL crystallization, and also opens a new door to extend applications of SNC particles.

    更新日期:2018-04-18
  • Anisotropic Shape Memory Behaviors of Polylactic Acid/Citric Acid-Bentonite Composite with a Gradient Filler Concentration in Thickness Direction
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Lihua Fu, Fudong Wu, Chuanhui Xu, Tinghua Cao, Ruimeng Wang, Shihao Guo

    Until now, polylactic acid (PLA) composites with a uniform dispersion of fillers have been extensively studied. However, there is few research report about the shape-memory (SM) behavior of a PLA composite in which the nanoclays have a non-uniform dispersion. In this paper, the alkaline calcium bentonite (ACBT) was firstly modified by citric acid (CA) to improve the compatibility between bentonite (BT) and PLA. The structure of CA-modified bentonite (CABT) were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray Diffraction (XRD) and scanning electron microscopy (SEM). Then the CABT/PLA composite with gradient concentration of CABT in thickness direction was fabricated. Because of the good affinity between the grafted CA and the ester groups, the CABT imposed powerful restrictions on the PLA chains, which contributed to the anisotropic driving force for shape recovery. The relationship between structure and properties and the mechanism of anisotropic SM behavior of composite were studied.

    更新日期:2018-04-18
  • Effects of the Ethoxide in the Coordination Sphere of Titanium on the Performance of MgCl2-based Ziegler-Natta Catalyst
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-18
    Adriano G. Fisch

    Traditional formulations of Ziegler-Natta catalysts that are based on magnesium ethoxide tend to generate titanium moieties presenting ethoxide ligand. It is suggested that the ethoxide group in the coordination sphere of titanium affects the catalyst activity and molecular weight distribution of the produced polymer. In the present work, a systematic synthesis of catalyst and chemical characterizations were accomplished with the objective of identifying correlations between the active sites presenting ethoxide as ligand and the performance of the catalyst in terms of activity and average molecular weight. Octahedral and trigonal-bipyramidal titanium moieties were identified as two groups of active sites in the catalyst. The ethoxide group as a ligand of the titanium was found in octahedral moieties only. Trigonal-bipyramidal titanium moieties have preferentially chlorine as ligands.

    更新日期:2018-04-18
  • Formulation of a New Trend CUSUM Chart to Monitor Batch Process Variables
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Laibin Zhang, Xi Ma, Jinqiu Hu, Shaohua Dong, Ahmet Palazoglu

    In the chemical and biochemical industries, batch processes play an important role in producing high-quality and value-added specialty products. The variables measured in such processes often have periodical trajectories with varying batch duration and fixed operational stages. The measured value of a process variable only provides part of the information about process condition, while the process monitoring and operation activities mostly rely on the trends and trajectories of these variables. It is necessary to construct a trend monitoring statistic to detect an abnormality in a batch process variable trajectory, so as to provide operation decision support and guarantee product quality. In this paper, a new trend CUSUM chart is introduced as a way to detect the deviation of batch process variable trends, which may be caused by abnormal operations. This method relies on the extraction of variable trend features as a combination of derivatives through a functional description of variable trajectories. This, then, leads to the construction of an individual trend CUSUM chart and a multiple trend CUSUM chart. The multiple trend CUSUM chart, the sum of the trend CUSUM charts of all process variables, is aimed to improve the monitoring efficiency by combining the trend deviations of all variables in a single chart. The potential of these novel univariate control charts is demonstrated using the batch manufacture of polypropylene (PP). Studying several simulated and actual batches, results show that the trend CUSUM chart is capable of capturing trend abnormalities. We also show, by comparison, that alarms can be triggered in the trend CUSUM chart before the measured process variables exceed the control limits of their Shewhart individuals charts, allowing for the corrections to be made at an early stage of an abnormal situation.

    更新日期:2018-04-18
  • Improved Prediction of Phosphorus Dynamics in Biotechnological Processes by Considering Precipitation and Polyphosphate Formation: A Case Study on Antibiotic Production with Streptomyces coelicolor
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Patrick Bürger, Xavier Flores Alsina, Harvey Arellano-Garcia, Krist V. Gernaey

    The multiplicity of physico-chemical and biological processes, where phosphorus is involved, makes their accurate prediction using current mathematical models in biotechnology quite a challenge. In this work, an antibiotic production model of Streptomyces coelicolor is chosen as a representative case study in which major difficulties arise in explaining the measured phosphate dynamics among some minor additional issues. Thus, the utilization of an advanced speciation model and a multiple mineral precipitation framework is proposed to improve phosphorus predictions. Furthermore, a kinetic approach describing intracellular polyphosphate accumulation and consumption has been developed and implemented. A heuristic re-estimation of selected parameters is carried out to improve overall model performance. The improved process model predicts phosphate dynamics (Root Mean Squared Error ≤52h: -90 %, Relative Average Deviation ≤52h: -96 %) very accurately in comparison to the original implementation, where biomass growth/decay was the only phosphorus source-sink. In addition, parameter re-estimation achieved an improved description of the available measurements for biomass, total ammonia, dissolved oxygen and actinorhodin concentrations. This work contributes to the existing process knowledge of biotechnological systems in general and especially to antibiotic production with S. coelicolor, while emphasizing the (unavoidable) need of considering both physico-chemical and biological processes to accurately describe phosphorus dynamics.

    更新日期:2018-04-18
  • Colloid transport in aggregated porous media with intra- and inter-aggregate porosities
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Hongjuan BAI, Laurent Lassabatere, Edvina Lamy

    Column tracer and colloid transport experiments were performed under both saturated and unsaturated steady state flow conditions in an aggregated porous medium with bimodal pore size distribution (PSD): intra-aggregate porosity with a pore radius between 10-2 and 10-1 μm and inter-aggregate porosity ranged between 101-103 μm (inter-porosity). All experiments were carried out under unfavorable conditions for physicochemical attachment to solid-water interfaces, using negatively charged porous media and latex microspheres (1 µm). Both porous media and colloids used in this work were hydrophobic. The results obtained through experimental observations and numerical simulations in the aggregated medium were confronted with those obtained for a sandy medium, characterized by a narrow unimodal PSD with a pore radius ranged between 101-102 μm (inter-porosity), to explore the relative importance of the PSD on water flow, colloid transport and deposition. Physicochemical interactions between colloids and porous media, calculated according to the DLVO theory, showed no primary minimum and low secondary minimum depth, suggesting reversible colloid retention and possibility for colloid detachment by hydrodynamics drag for both sand and aggregated media. Hydrodynamic drag forces were slightly greater than the resisting adhesive DLVO forces in the secondary minimum, indicating a possibility for colloid detachment. For the same flow rate, more non-uniform transport of colloids were obtained in the bimodal aggregated medium compared to the unimodal sand. If the non-uniform and preferential transport of colloids should contribute in decreasing of colloids retention, particularly under saturated flow conditions, surprisingly greater overall colloid retention was obtained in the aggregated medium. Based on the PSD, colloid exclusion from smaller pores has higher probability to occur in the aggregated medium compared to the sand. Therefore, size exclusion contributed to the overall preferential transport in this dual porosity medium, and it was expected that this non-uniform transport would disfavor colloid retention. However, colloid retention efficiency at the column scale was higher for the aggregated medium compared to the sand under saturated flow conditions, despite a more uniform flow and transport in the later. This means that the presence of the intra-porosity in the aggregated medium and related small pores contributed not only in colloid size exclusion, but it had also an opposite effect, resulting in additional deposition sites of colloid particles. Under unsaturated flow conditions, capillary forces governed colloid retention, independently from the PSD.

    更新日期:2018-04-18
  • A Model for Gas Transport in Dual-Porosity Shale Rocks with Fractal Structures
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Jinze Xu, Keliu Wu, Zhandong Li, Yi Pan, Ran Li, Jing Li, Zhangxin Chen
    更新日期:2018-04-18
  • Preparation of Mesoporous Carbon Materials through Mechanochemical Reaction of Calcium Carbide and Transition Metal Chlorides
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Ke Zhang, Shengjie Tao, Xuebing Xu, Hong Meng, Yingzhou Lu, Chunxi Li
    更新日期:2018-04-18
  • Vortex Formation and Subsequent Air Entrainment inside a Liquid Pool
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Parmod Kumar, Mihir Prajapati, Arup K. Das, Sushanta K. Mitra
    更新日期:2018-04-18
  • Stability Control of AgPd@Pt Trimetallic Nanoparticles via Ag–Pd Core Structure and Composition: A Molecular Dynamics Study
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Hamed Akbarzadeh, Mohsen Abbaspour, Esmat Mehrjouei, Maliheh Kamrani
    更新日期:2018-04-18
  • Waste Conversion and Resource Recovery from Wastewater by Ion Exchange Membranes: State-of-the-Art and Perspective
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Wen-Yan Zhao, Miaomiao Zhou, Binghua Yan, Xiaohan Sun, Yang Liu, Yaoming Wang, Tongwen Xu, Yang Zhang
    更新日期:2018-04-18
  • Empirical Mass and Kinetic Models for the Flash Evaporation of NaCl Water Solution
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Yong Liu, Qiong Luo, Guodong Wang, Siyuan Zhao, Xianlong Li, Ping Na

    This paper attempts to provide empirical mass and kinetic models for the flash evaporation of sodium chloride (NaCl) aqueous solution based on experimental phenomena. The models have nine parameters and six affecting factors including initial temperature, operation pressure, NaCl mass fraction, solution depth, evaporator diameter and time. Based on a large number of flash evaporation experimental data from various literatures, the mass model parameters were optimized and validated. After optimizing the model parameters with 283 sets of literature experimental data, the average relative error between the model values and the experimental data is about 5.7%. And a statistical method proved the mass model is well posed. The verification with other 215 sets of literature experimental data showed the mass model is in good agreement with flash evaporation phenomena, and the average relative error between the model values and the experimental data is about 8.3%. Then, the kinetic model of flash evaporation was obtained according to the empirical mass model. Finally, the analysis of these models indicated that the increase of initial temperature or evaporator diameter and the decrease of operating pressure are in favor of evaporation. Although the increase of solution depth can improve the evaporated mass, the corresponding evaporation efficiency will slightly reduce. And the increase of salt content is having a detrimental effect on the evaporation of NaCl water solution. In addition, the influence of salt content on evaporation at higher operating pressure is more obvious than that at lower operating pressure. The above results show that these models proposed in our work have high accuracy, wide practicability and good rationality.

    更新日期:2018-04-18
  • Two Branched Silicone Resins with Different Reactive Groups: A Comparative Evaluation
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Xibing Zhan, Huijuan Liu, Junying Zhang
    更新日期:2018-04-17
  • 更新日期:2018-04-17
  • Hydrothermal Degradation of Cellulose at Temperature from 200 to 300 °C
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Tanja Gagić, Amra Perva-Uzunalić, Željko Knez, Mojca Škerget
    更新日期:2018-04-17
  • Fluid dynamics and mass transfer study of electrochemical oxidation by CFD prediction and experimental validation
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-17
    Li Liu, Wangfeng Cai, Yiqing Chen, Yan Wang

    Flow hydrodynamics and mass transfer have been investigated using numerical simulation and validated using experimental measurements. UV-vis measurements have been obtained to determine the apparent heterogeneous rate constant, kapp, and adsorption-desorption equilibrium constant, K, of the electrochemical oxidation of p-Methoxyphenol(PMP). Generation of gas bubbles was visualized using a high-speed camera, and MATLAB was used to process the pictures in order to obtain the average void fraction. The results of these measurements can be used for both qualitative and quantitative comparisons with simulation results. Two-phase bubbly flow has been described by a mathematical model based on the Euler-Euler approach. To accurately predict the two-phase bubbly flow in an electrolyser, the coalescence and breakage of gas bubbles was considered, and a developed model of the interfacial area concentration has been adopted. This study shows that different operating conditions affect the void fraction and gas bubble layer. Additionally, the mass transfer efficiency and mass transfer correlations have been investigated in order to design the optimal experiments for electrochemical oxidation.

    更新日期:2018-04-17
  • Extensive Study of the Capabilities and Limitations of the CPA and sPC-SAFT Equations of State in Modeling a Wide Range of Acetic Acid Properties
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Rafael T. C. S. Ribeiro, André L. Alberton, Márcio L. L. Paredes, Georgios M. Kontogeorgis, Xiaodong Liang
    更新日期:2018-04-17
  • Identification of Vicinal Silanols and Promotion of Their Formation on MCM-41 via Ultrasonic Assisted One-Step Room-Temperature Synthesis for Beckmann Rearrangement
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Zichun Wang, Yijiao Jiang, Yunyao Zhang, Jeffrey Shi, Catherine Stampfl, Michael Hunger, Jun Huang
    更新日期:2018-04-17
  • 更新日期:2018-04-17
  • Rapid Continuous Supercritical CO2 Extraction and Separation of Organic Compounds from Liquid Solutions
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Tatsuya Fujii, Yasuaki Matsuo, Shin-ichiro Kawasaki
    更新日期:2018-04-17
  • Thermal Conductivity of Ionic Liquids and IoNanofluids and their Feasibility as Heat Transfer Fluids
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    João Manuel Pedro Moisão França, Maria José V. Lourenço, S.M. Sohel Murshed, Agilio A. H. Padua, Carlos A. Nieto de Castro

    Ionic liquids and IoNanofluids were studied in recent years as possible alternatives to current engineering fluids, namely in the area of heat transfer. Excellent thermal properties, like high heat capacity per unit volume and thermal conductivity, allied to the dispersion of nanoparticles in them, have created great expectations, as the enhancement of their thermophysical properties liquids can contribute to better efficiency in heat transfer. The thermal conductivity of [P66614][N(CN)2], [P66614][Br], [C2mim][SCN], [C4mim][SCN], [C2mim][C(CN)3] and [C4mim][C(CN)3] in the temperature range 293 to 343 K at 0.1 MPa and their IoNanofluids with MWCNTs is reported in the present work. While we could not obtain stable suspensions with phosphonium based ionic liquids, thermal conductivity enhancement of cyano-based ionic liquids was compared with our previous work using dicyanamide ionic liquids. The thermal conductivity of C2mim+ ionic liquids and IoNanofluids is generally higher than the corresponding C4mim+ fluids. Temperature dependence of thermal conductivity enhancement hinders the conception of a unified thermal conductivity enhancement predictive model of the presented IoNanofluids, current theories under-predicting its value for the dispersions studied. Finally, we selected a specific heat transfer process and calculated the heat transfer area necessary using currently commercialized heat transfer fluids, ionic liquids and IoNanofluids. While the addition of nanomaterial to the ionic liquids leads to an increase in the heat transfer available area, the enhancement of the thermophysical properties leads to a smaller variation of the area with temperature. Depending on the ionic liquid, some of the IoNanofluids studied are head-to-head with a significant number of currently used heat transfer fluids concerning the heat transfer area necessary to transfer the same amount of heat.

    更新日期:2018-04-17
  • A MIL-101 composite doped with porous carbon from tobacco stem for enhanced acetone uptake at normal temperature
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Denghui Li, Liqing Li, Ruofei Chen, Chunhao Wang, Hailong Li, Haoyang Li

    A high efficiency adsorbent for acetone under normal temperature was prepared with metal-organic framework MIL-101 doped with porous carbon from tobacco stem (MIL-101/TC) by a solvothermal synthesis method. These synthesized composites were characterized and then investigated for acetone adsorption at 288 K and 298 K up to 20 kPa. The isosteric heat of adsorption was estimated from adsorption isotherms of acetone vapor. Temperature programmed desorption (TPD) was employed to calculate the activation energies of acetone desorption on MIL-101/TC and MIL-101. Results of characterization showed that MIL-101/TC possessed similar crystal structure and morphology to MIL-101. Despite smaller BET surface area, MIL-101/TC-40 and MIL-101/TC-30 composites had much higher acetone uptake of 1137 mg/g and 1123 mg/g at 18.9 kPa and 18.1 kPa in 288 K, respectively, which increased by 19.8% and 18.3% than that of MIL-101 composites. The increase in acetone uptakes was attributed to the associative effect of the enhancement of the surface dispersive forces and the activation of the unsaturated metal sites by TC loading. The isosteric heat of acetone adsorption on the MIL-101/TC was much higher than that on the MIL-101, and the maximum isosteric adsorption heat on the MIL-101/TC-40 was 52 kJ/mol. The activation energy of desorption obtained through TPD ranged from 24.5 kJ/mol to 48.5 kJ/mol. The acetone adsorption isotherms of the composites could be fitted favorably by the L-F equation.

    更新日期:2018-04-17
  • Exponential smoothing reconstruction approach for incipient fault isolation
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Hongquan Ji, Xiao He, Jun Shang, Donghua Zhou

    Accurate detection and isolation of an incipient fault is crucial for efficient and optimal operation of industrial processes. In the area of statistical process monitoring (SPM), reconstruction-based methods are widely used for fault isolation purposes. Though possessing several merits, most existing conventional reconstruction methods are not efficient in isolating incipient faults that have small magnitudes. This paper proposes a new method called exponential smoothing reconstruction (ESR) for incipient fault isolation. The proposed ESR introduces the exponentially weighted moving average (EWMA) technique to conventional reconstruction methods. Fault isolability analysis of the ESR is provided, which demonstrates its efficiency in isolating incipient faults, compared with conventional reconstruction-based methods. Several remarks on the use of ESR, such as selection of the smoothing parameter and some practical issues, are discussed as well. Finally, simulation studies on a numerical example and a continuous stirred tank heater (CSTH) process are used to demonstrate the effectiveness of the proposed ESR method, in comparison with conventional approaches.

    更新日期:2018-04-17
  • Rare Earth / Transition Metal Oxides for Syngas Tar Reforming - a Model Compound Study
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Jaren Lee, Rui Li, Mike Janik, Kerry M. Dooley

    A major problem in biomass or coal gasification is removal of syngas byproducts such as H2S, NH3 and tars (heavy hydrocarbons) that cause catalyst deactivation and clogging problems downstream. Rare earth oxides (REOs) doped with transition metals (TMs) are promising catalysts for tar reforming. With propane as a model compound, we compared such catalysts to a typical supported Ni catalyst, and also to recent DFT results modeling these systems. The REO/TM catalysts are active over the range 920-1000 K, with no significant deactivation in non-sulfur containing feeds. In particular, a Mn/CeO2 catalyst showed good reforming activity with low carbon, CO2 and CH4 yields. This catalyst also maintained some activity in the presence of 40 ppm H2S. Kinetics calculations showed that most such catalysts have near zero-order kinetics with respect to water, making them usable with a variety of gasifier effluents. Characterization of used catalysts by multiple techniques suggests that the metal-doped REOs do not undergo much (if any) phase separation in extended use under tar reforming conditions, with Mn- and La-doped CeO2 being especially stable.

    更新日期:2018-04-17
  • Mussel-inspired Monovalent Selective Cation Exchange Membranes Containing Hydrophilic MIL53(Al) Framework for Enhanced Ion Flux
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Jian Li, Junyong Zhu, Shushan Yuan, Xin Li, Zhijuan Zhao, Yan Zhao, Yuxin Liu, Alexander Volodine, Jiansheng Li, Jiangnan Shen, Bart Van der Bruggen

    The surface properties and structure of a membrane play a significant role in the ion selectivity during electrodialysis. Recently, polydopamine (PDA) and its related nanomaterials have emerged as promising materials to develop composite membranes for higher separation requirements. Previous research has shown that the codeposition of PDA and polyethylenimine (PEI) triggered by Cu2+/H2O2 could facilitate the transport of H+ while rejecting multivalent ions though electrostatic effects. However, the enhanced H+ flux by acid-base pairs is not applicable in Na+/Mg2+ system. Here we report a facile method to construct monovalent selective membranes through rapid codeposition of PDA/PEI and Mil(53)-Al, followed by cross-linking with trimesoyl chloride (TMC). The positive -NH2 allows to reject multivalent cations, while porous Mil(53)-Al can accelerate the migration of Na+. The surface morphology and physicochemical properties of the as-prepared composite membranes were studied by SEM, AFM and XPS analyses, and the electro-chemical properties were evaluated by EIS and current-voltage curves. The results demonstrated that a robust skin layer was formed on the commercial cation exchange membrane substrate, endowing the ion exchange membrane with an increased separation performance for multivalent ions. The monovalent selectivity and ion flux can be tuned by changing the ratio of Mil(53)-Al during the co-deposition process. A mass ratio of 0.2-0.4% (w/v) for Mil(53)-Al is the optimum protocol, yielding a membrane with a permselectivity of about 0.3 and an ion flux of about 22.0 and 0.6 mol·cm-2·s-1 for Na+ and Mg2+, respectively. At this condition, the PDA-coated membrane maintains a high monovalent selectivity with enhanced Na+ and Mg2+ flux in single salt solutions. This one-pot method to prepare PDA based membrane provides a new direction to prepare monovalent selective ion exchange membranes.

    更新日期:2018-04-17
  • Start-up Time and Load Range for the Methanation of Carbon Dioxide in a Fixed-Bed Recycle Reactor
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Steffi Matthischke, Stefan Roensch, Robert Güttel

    Fluctuating wind and solar energy can be used to produce hydrogen by water electrolysis and subsequently for the synthetic natural gas production via methanation in the power-to-gas process. This paper investigates the unsteady-state operation of the methanation in an adiabatic and cooled fixed-bed reactor, respectively, with product recirculation by simulation of a one-dimensional fixed-bed reactor model. The results show that adiabatic fixed-bed reactors with product recirculation can operate in a wide range of partial and excess load. The recirculation of product gas cools the adiabatic fixed-bed reactor effectively and an optimal recycle ratio for the highest methane productivity exists. Cooled reactors are very sensitive to load changes of the volumetric flow rate and thus less flexible. However, the recycle of product gas allows reducing the sensitivity for a more stable operation under fluctuating feed conditions. The start-up time of cooled fixed-bed reactors is considerably lower. In summary, the flexibility of the dynamic methanation is enhanced in a loop-reactor arrangement.

    更新日期:2018-04-17
  • Magnetic Framework Composites for low Concentration Methane Capture
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Muhammad Munir Sadiq, Marta Rubio-Martínez, Farnaz Zadehahmadi, Kiyonori Suzuki, Matthew R Hill

    This study proposes a simple and energy efficient technique for methane (CH4) capture from low concentration emission sources. An extrusion-based process was used to fabricate magnetic framework composites (MFCs) from a metal organic framework (MOF), aluminium fumarate and MgFe2O4 magnetic nanoparticles (MNP). Methane uptake for MFCs with different MNP loading at 1 Bar and 300 K revealed a high methane uptake of up to 18.2 cm3g-1. To regenerate the MFCs, a magnetic induction swing adsorption (MISA) process was applied. A working capacity of 100 % was achieved for the MFC over 10 adsorption-desorption cycles with an average of 6 minutes per cycle for the regeneration step. The ability to access 100% of the adsorbed CH4 in the MFC with rapid and localised heating achieved with the MISA process potentially provides an energy efficient technique for CH4 capture and reuse from low concentration sources.

    更新日期:2018-04-17
  • Vapor Pressure and Heat of Vaporization of Molecules That Associate in the Gas Phase
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Radomir I. Slavchov, Javor K. Novev, Sebastian Mosbach, Markus Kraft
    更新日期:2018-04-16
  • A promising 3D flower-like CuWO4 photoanode modified with CdS and FeOOH for efficient photoelectrochemical water splitting
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Miao Zhou, Zhihua Liu, Xifei Li, Zhifeng Liu

    This paper describes a novel promising film based on the flower-like CuWO4 structure, and applied on photoelectrochemical (PEC) water splitting as photoanode firstly. The growth mechanism and microstructure of CuWO4 are discussed in detail. The PEC measurements indicate that such flower-like CuWO4 exhibited a photocurrent density of 0.58 mA/cm2 at 0.8 V versus RHE. When coupled with CdS and FeOOH layers, the triple CuWO4/CdS/FeOOH photoanode exhibites further improved PEC performance with a higher photocurrent density about 2.05 mA/cm2 at 0.8 V versus RHE and excellent operation stability. The remarkable PEC performance stems from several crucial factors as following: (i) ideal band gap; (ii) improved light absorption; (iii) efficient charge-hole pairs separation and collection.

    更新日期:2018-04-16
  • Synergistic Combination of a Novel Metal-Free Mesoporous Bandgap-modified Carbon Nitride Grafted Polyaniline Nanocomposite for Decontamination of Refractory Pollutant
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-16
    Balakumar Vellaichamy, Prakash Periakaruppan

    A synthesis of novel sulfur and phosphoruos co-doped graphitic carbon nitride (SP-g-C3N4) covalently grafted polyaniline (PANI) metal-free nanocomposite via an in-situ oxidative polymerization is reported here. The nanocomposite was characterized by various instrumentation techniques such as UV-DRS, FT-IR, XRD, SEM, HR-TEM, EDX, and SEM mapping analysis. The as-prepared SP-g-C3N4−PANI metal-free nanocomposite shows an outstanding photocatalytic activity for the dedyeing of methylene blue (MB) under visible light irradiation. The nanocomposite catalyst greatly promotes the charge separation efficiency of photogenerated electrons and holes compared to its single counterpart viz. PANI, S-g-C3N4, P-g-C3N4, and SP-g-C3N4 for catalytic degradation. The present novel approach provides a new insight into the design and development of nanocomposite materials for the removal of toxic contaminants for public safety and security. Also, study of this kind will undoubtedly expedite new researches on solar-driven water splitting.

    更新日期:2018-04-16
  • 更新日期:2018-04-14
  • Dual SIMC-PI Controller Design for Cascade Implement of Input Resetting Control with Application
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-13
    Bo Sun, Sigurd Skogestad, Junguo Lu, Weidong Zhang

    Input resetting control (IRC) is an economical and effective approach to achieve good closed-loop behavior for systems with extra inputs. The paper investigates use of the cascade IRC implementation in the two-input-single-output (TISO) case. The SIMC method is employed as the PI tuning rule for achieving input resetting responses with the desired robustness level. An important feature of the proposed methodology is that both of fast and slow controllers are dealt with in a unified way. Followed by obtaining a SIMC-PI fast controller with a rapid set-point tracking response, the SIMC rule is applied for designing the outer loop controller in terms of an equivalent transfer function between the two manipulated variables. Numerical simulations have been carried out on time delay processes to demonstrate the effectiveness of the proposed method. Moreover, the feasibility of implementing the proposed control strategy in practice is verified by a light intensity control experiment.

    更新日期:2018-04-14
  • Adsorption of Contaminants of Emerging Concern from Aqueous Solutions using Cu2+ Amino Grafted SBA-15 Mesoporous Silica: Multi-Component and Metabolites Adsorption
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-13
    Krisiam Ortíz-Martínez, Doris Vargas Valentin, Arturo J. Hernandez-Maldonado

    SBA-15 and Cu2+ amino grafted SBA-15 adsorbents (CuNH2_g_SBA-15) were prepared to investigate the equilibrium and dynamic adsorptive removal of a set of contaminants of emerging concern (CECs; carbamazepine, caffeine, clofibric acid, salicylic acid, and naproxen) from water. Multi-component and CEC metabolites adsorption was also evaluated to elucidate effects on adsorption capacity and selectivity. Equilibrium adsorption studies showed that CuNH2_g_SBA-15 is capable of removing anionic and acidic CECs even at trace level concentrations. However, multi-component tests revealed a decrease of 30% in adsorption capacity in the case of the acids. The CuNH2_g_SBA-15 variant was the less affected by multi-component competitive adsorption, probably due to the ability of this adsorbent to interact with CECs through several, simultaneous adsorption mechanisms (i.e., electrostatic interaction, hydrogen bonds, and metal coordination complexes). These were confirmed via X-ray photoelectron spectroscopy (XPS) analyses. Preliminary fixed-bed adsorption tests showed that beds made CuNH2_g_SBA-15 are prone to mass-transfer resistance in comparison to those made of unmodified SBA-15, causing a decrease in both adsorption capacity and degree of bed utilization. Adsorption of parent/metabolites CEC binary mixtures resulted in a reduction in adsorption capacity of the parent CECs, but the adsorbents showed a remarkable selectivity toward the metabolites, particularly CuNH2_g_SBA-15. In general, this study provides substantial evidence that the anchoring of amine/copper species onto the surface of mesoporous silica may provide a platform for the development of CEC selective adsorbents for water treatment.

    更新日期:2018-04-14
  • A Novel Continuous Multiphase Reactor For Chemically Processing Polymer Fibers
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-13
    Eric John Hukkanen, Bryan Barton, Jasson Patton, David Schlader, Yiqun Zhang, Xiaohua Qiu, Lora Brehm, Bryan Haskins, Weijun Wang, Nicholas Horstman, Mark Spalding, Daniel A Hickman, Christopher W Derstine

    Chemical reactions on the surface or throughout a thermoplastic fiber present an interesting and challenging reaction engineering problem. This paper presents the design and implementation of a modular multiphase continuous stirred tank reactor for the sulfonation of polyethylene fibers. Polyethylene fiber tows, comprising of 1000-6000 filaments, are sulfonated in a series of stirred tank reactors. Fundamental reaction engineering principles are applied to address common batch-to-continuous reactor challenges, such as heat and mass transfer, material balances, and reaction kinetics. The introduction of polymer fibers to a continuous process also requires the solution of practical problems associated with fiber processing. Additional considerations are introduced for designing a reactor system for continuous processing of fiber using liquid with a batch reactor or CSTR contacting pattern in each vessel and containing the effluent gaseous reaction byproducts in a controlled vent stream. The overall sulfonation reaction stoichiometry was determined such that ~1 mol of SO3 reacts per mol CH2 fed. Additionally, carbon sulfonation selectivity was determined to be 95-99%, depending on the sulfonation conditions.

    更新日期:2018-04-14
  • 更新日期:2018-04-13
  • 更新日期:2018-04-13
  • Stability Analysis of Ethylene Polymerization in a Liquid-Containing Gas–Solid Fluidized Bed Reactor
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-12
    Xiaoqiang Fan, Jingyuan Sun, Jingdai Wang, Zhengliang Huang, Zuwei Liao, Guodong Han, Yongrong Yang, Lei Xie, Hongye Su
    更新日期:2018-04-13
  • Simulation–Optimization-Based Design of Crude Oil Distillation Systems with Preflash Units
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-12
    Minerva Ledezma-Martínez, Megan Jobson, Robin Smith
    更新日期:2018-04-13
  • Molybdenum(VI) Coordination in Tributyl Phosphate Chloride Based System
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-12
    Peter Tkac, Md Abdul Momen, Andrew T. Breshears, M. Alex Brown, George F. Vandegrift
    更新日期:2018-04-13
  • Theoretical Evaluation of Two-Phase Flow in a Chromatographic Reactor
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-12
    Franziska Ortner, Marco Mazzotti
    更新日期:2018-04-13
  • Oxidation of Benzyl Alcohol over Nanoporous Au–CeO2 Catalysts Prepared from Amorphous Alloys and Effect of Alloying Au with Amorphous Alloys
    Ind. Eng. Chem. Res. (IF 2.843) Pub Date : 2018-04-12
    Ai Nozaki, Tasuku Yasuoka, Yasutaka Kuwahara, Tetsutaro Ohmichi, Kohsuke Mori, Takeshi Nagase, Hiroyuki Y. Yasuda, Hiromi Yamashita
    更新日期:2018-04-13
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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