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Antioxidant Activity of Potato Seedlings at Different Storage Temperatures Int. J. Chem. Eng. (IF 1.877) Pub Date : 2021-02-26 Lei Wang; Junlian Zhang; Chang Liu; Arash Arabmarkadeh
In order to promote the storage and growth of potato seedlings, the antioxidant activities of potato seedlings at different storage temperatures were analyzed. The antioxidant activities of potato seedlings at two different temperatures were compared. In addition, the effects of high temperature and normal temperature on the growth phenotype and antioxidant system physiological indexes of potato seedlings
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Alumina Support for Cobalt Catalyst in a Methane Dry Reforming Reaction: The Role of Water Content in a Solvent Medium Int. J. Chem. Eng. (IF 1.877) Pub Date : 2021-02-11 My Hien Thi Bach; Ngoc Thang Tran; Thanh Nha Thi Tran; Van Cuong Nguyen; Hong Anh Thi Nguyen
This study aimed to synthesize alumina from an inorganic aluminum nitrate precursor in various binary solvent systems of ethanol and water using the sol-gel self-assembly (SSA) method, employing a triblock copolymer, pluronic P123, as the pore-directing agent. The resulting materials were implemented as a support for the cobalt (Co) catalyst in a methane dry reforming (MDR) reaction at 1073 K under
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A Performance Comparison of Anaerobic and an Integrated Anaerobic-Aerobic Biological Reactor System for the Effective Treatment of Textile Wastewater Int. J. Chem. Eng. (IF 1.877) Pub Date : 2021-02-10 Tasneem M. Kathawala; K. Veena Gayathri; P. Senthil Kumar
The accumulation of recalcitrant azo dyes from untreated textile effluents has adversely impacted the ecosystem. The immense stability in their nature is conferred by the presence of azo bonds (N=N) in their structure. The reduction of this azo bond occurs exclusively under anaerobic conditions giving rise to colorless aromatic amines, which are carcinogenic. In the present study, a synthetic textile
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Application of Raw and Modified Pomegranate Peel for Wastewater Treatment: A Literature Overview and Analysis Int. J. Chem. Eng. (IF 1.877) Pub Date : 2021-01-21 Samia Ben-Ali
The use of renewable substrates as biosorbents has a great attention in wastewater treatment. The pomegranate peel (PGP) constitutes one of these substrates. A review is carried out to investigate the potential of pomegranate peel (PGP) for wastewater treatment. Physical and chemical PGP properties are presented and compared to those of Tunisian pomegranate peel (El Gabsi). Raw and modified PGP performance
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Structural and Electrochemical Properties of Lanthanum Silicate Apatites La10Si6−x−0.2AlxZn0.2O27−δ for Solid Oxide Fuel Cells (SOFCs) Int. J. Chem. Eng. (IF 1.877) Pub Date : 2021-01-19 Shammya Afroze; Hidayatul Qayyimah Hj Hairul Absah; Md Sumon Reza; Mahendra Rao Somalu; Jun-Young Park; Saeed Nekoonam; Alibek Issakhov; Abul Kalam Azad
An excellent oxide ion conductivity with high oxygen transportation of lanthanum silicate apatite at the solid oxide fuel cell (SOFC) can be achieved through the solid-state reaction method. The doped La10Si6−x−0.2AlxZn0.2O27−δ (x = 0.2 and 0.4) materials sintered at 1600°C accomplished crystallinity and crystal structure of apatite-type. The structural and electrochemical characterizations of La10Si6−x−0
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Novel Systems and Membrane Technologies for Carbon Capture Int. J. Chem. Eng. (IF 1.877) Pub Date : 2021-01-13 Eshorame Samuel Sanni; Emmanuel Rotimi Sadiku; Emeka Emmanuel Okoro
Due to the global menace caused by carbon emissions from environmental, anthropogenic, and industrial processes, it has become expedient to consider the use of systems, with high trapping potentials for these carbon-based compounds. Several prior studies have considered the use of amines, activated carbon, and other solid adsorbents. Advances in carbon capture research have led to the use of ionic
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Thermophysical Properties of 1-Octyl-3-Methylimidazolium Acetate with Organic Solvents Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-12-09 Fuxin Yang; Peng Feng
Ionic liquid (IL) usually possesses high viscosity. In this work, the selected organic solvents, namely, dimethyl sulfoxide, N,N-dimethylacetamide, and N,N-dimethylformamide, were used as the diluents to lower IL viscosity. The thermophysical properties of the densities and viscosities for the binary mixtures of IL (i.e., 1-octyl-3-methylimidazolium acetate) with solvents were studied at normal pressure
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Pitting Suppression of AISI 316 Stainless Steel Plates in Conditions of Ultrasonic Vibration Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-12-04 Georgii S. Vasyliev; Oleg M. Kuzmenko
Plate heat exchangers are widespread type of equipment that suffers from pitting corrosion in chloride containing solutions. Anodic behaviour of AISI 316 stainless steel was tested in 3.5% NaCl solution in conditions of ultrasound vibration (27 kHz, 10 W). The potentiodynamic sweep, potentiostatic technique, and galvanostatic technique were used coupled with surface morphology investigation after polarization
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Investigation of Structural and Thermal Evolution in Novel Layered Perovskite NdSrMn2O5+δ via Neutron Powder Diffraction and Thermogravimetric Analysis Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-11-29 Shammya Afroze; Duygu Yilmaz; Md Sumon Reza; Paul F. Henry; Quentin Cheok; Juliana H Zaini; Abul K. Azad; Alibek Issakhov; Milad Sadeghzadeh
Neutron diffraction is one of the best methods for structural analysis of a complex, layered perovskite material with low symmetry by accurately detecting the oxygen positions through octahedral tilting. In this research, the crystal structure of NdSrMn2O5+δ was identified through X-ray diffraction (XRD) and neutron powder diffraction (NPD) at room temperature (RT), which indicated the formation of
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Effect of Lubricant Additives on the Oxidation Characteristics of Diesel Engine Particulate Matter Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-11-24 Guangju Xu; Yang Zhao; Mingdi Li; Yanbin Hu; Ling Lin
Three common lubricant additives, including an antioxidant, detergent, and an antifoamer, were added to diesel fuel to perform a diesel engine bench test. Particulate matter samples underwent thermogravimetric analysis to investigate the effect of lubricant additives on the particulate matter oxidation process, characteristic temperature, and activation energy. The results showed the following. Different
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Removal of 17β-Estradiol (E2) from Aqueous Solutions Using Potassium Permanganate Combined with Ultraviolet (KMnO4/UV) Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-11-24 Monirah Ataee; Abdolmajid Fadaei; Gashtasb Mardani; Morteza Sedehi
17β-Estradiol (E2) has a significant health risk to humans, even at the ng/L level, and is discharged to the aqueous environment through wastewater. Advanced oxidation processes were proposed as an efficient process for the removal of E2. In this study, a combination of ultraviolet-C (UV-C) and KMnO4 was applied for the removal of E2. Results have shown that the removal efficiency of E2 in pH 4 (acidic
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Kinetics of Transesterification of Croton megalocarpus Oil Using Alkaline Earth Catalysts with Conventional and Microwave Heating Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-11-16 Anil Kumar; Henry K. Kiriamiti
Transesterification kinetics of Croton megalocarpus oil to produce fatty acid methyl esters (FAME) was studied using homogeneous NaOH and heterogeneous alkaline earth Nano MgO, MgO, Nano CaO, CaO, Reoxidized CaO, SrO, and BaO catalysts. Characteristic surface, bulk, and chemical properties of the heterogeneous catalysts were obtained which included surface area, pore properties, scanning electron micrography
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Kinetic Study of Calcium Phosphate Precipitation in the System H3PO4-Ca(OH)2-H2O at 30°C Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-11-10 K. Labgairi; A. Borji; M. Kaddami; A. Jourani
The precipitation kinetics of calcium phosphates, namely, hydroxyapatite (HAP), dicalcium phosphate dihydrate (DCPD), dicalcium phosphate anhydrous (DCPA), and monocalcium phosphate monohydrate (MCPM), were studied at 30°C by mixing calcium hydroxide, water, and phosphoric acid. The studied mixture was selected according to the stability domain of different calcium phosphates by referring to the phase
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Preparation and Application of Aromatic Polymer Proton Exchange Membrane with Low-Sulfonation Degree Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-10-14 Yushan Gao; Zhidan Zhang; Shuangling Zhong; Reza Daneshfar
4,4′-Dichlorodiphenylsulfone-3,3′-disulfonic acid (disodium) salt and 4,4′-difluorodiphenylsulfone were used as sulfonated monomer. 4,4′-Fluorophenyl sulfones were used as the nonsulfonated monomer. 4,4′-Dihydroxy diphenyl ether or 4,4′-thiodibenzenethiol was used as the comonomer. The sulfonated poly (aryl ether sulfone) (SPES) and sulfonated poly (arylene thioether sulfone) (SPTES) with sulfonation
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Development of Kaolin Clay as a Cost-Effective Technology for Defluoridation of Groundwater Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-10-07 Adane Adugna Ayalew
Excessive fluoride in potable groundwater is a serious health problem in rural areas of many developing countries. The presence of a small amount of fluoride in potable water is beneficial to human health, but a high amount (>1.5 mg/L) has adverse effects. The present study is aimed to prepare a new cost-effective adsorbent of kaolin clay that can be used as a valuable defluoridating agent. Characterization
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Removal of Ammonium from Aqueous Solutions Using Zeolite Synthesized from Electrolytic Manganese Residue Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-09-14 Changxin Li; Yuan Yu; Qingwu Zhang; Hong Zhong; Shuai Wang
This paper carried out the study on removal of ammonium from aqueous solutions by zeolite derived from electrolytic manganese residue (EMR) via a fusion method. The variables of pH, contact time, EMRZ (EMR-based zeolite) dosage, initial ammonium concentration, and competitive cations and anions on the ammonium uptake capacity were systematically investigated in an attempt to illustrate adsorption performance
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Effect of Temperature on the Chemical Composition and Physicochemical Properties of Diester Aviation Lubrication Oil Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-09-04 Ting Yao; Na Zhang; Jianqiang Hu; Xiaoxiao Liao; Yongli Shen; Zhuoting Gan
High temperature is the main factor responsible for degrading the lubrication and antiwear properties of aero-lubricating oils. Accordingly, this study assessed the effects of thermal treatment of diester aviation lubricating oil and the associated mechanism. Fourier-transform infrared spectroscopy and gas chromatography/mass spectrometry analyses showed that low-molecular-weight compounds, such as
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Fractography and Tensile Properties of AA6061 Aluminium Alloy/Rice Husk Ash Silicon Nanocomposite Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-08-28 N. E. Udoye; O. S. I. Fayomi; A. O. Inegbenebor
The unstoppable quest for low-cost reinforcing agent gingered the enthusiasm towards developing and utilising the agro-based waste product as reinforcement since they are promptly accessible, sustainable, and inexpensive to purchase. In this study, AA6061/rice husk ash matrix composites were produced through metallurgical stir casting techniques. Different weight percentages of reinforcement in the
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Significance of Rarefaction, Streamwise Conduction, and Viscous Dissipation on the Extended Graetz–Nusselt Problem: The Case of Finite-Length Microchannels with Prescribed Wall Heat Flux Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-08-25 Antonio Brasiello; Alessandra Adrover
The article addresses the extended Graetz–Nusselt problem in finite-length microchannels for prescribed wall heat flux boundary conditions, including the effects of rarefaction, streamwise conduction, and viscous dissipation. The analytical solution proposed, valid for low-intermediate Peclet values, takes into account the presence of the thermal development region. The influence of all transport parameters
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An Improved Test Method for Energy Consumption and Range of Fuel Cell Vehicles Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-08-25 Dong Hao; Yanyi Zhang; Renguang Wang; Xiaobing Wang; Kai Zhu; Jun Li; Yongping Hou
At present, there are two main standards, ISO 23828 : 2013 and SAE J 2572–2014, which prescribe the hydrogen consumption test using the pressure method, gravimetric method, and flow method. However, these methods do not meet the test requirements for electric energy consumption and the range of plug-in hybrid fuel cell vehicles (FCVs) which are the main technical considerations in China and Europe
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Synthesis and Characterization of 5-Hydroxymethylfurfural from Corncob Using Solid Sulfonated Carbon Catalyst Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-08-05 Moges Admasie Mengstie; Nigus Gabbiye Habtu
5-Hydroxymethylfurfural as a versatile organic compound is considered as a promising biomass-derived product via hydrolysis followed by dehydration of lignocellulosic biomass using solid catalysts. In this study, lignocellulosic materials (corncob) were utilized to synthesize 5-hydroxymethylfurfural via solid acid catalytic conversion. The precursor of the catalyst material was chemically impregnated
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Enhancing the Activity and Stability of CuO/OMS-2 Catalyst for CO Oxidation at Low Temperature by Modification with Metal Oxides Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-08-03 Nhat Huy Nguyen; Bich Thao Nguyen Thi; Thao Giang Nguyen Le; Quynh Anh Nguyen Thi; Phuoc Toan Phan; Long Giang Bach; Trung Thanh Nguyen
In this study, mixed oxides of Mn-Cu and Fe-Cu on OMS-2 support having an octahedral structure were synthesized by the refluxing and impregnation methods. The characteristics of the materials were analyzed by XRD, FTIR, SEM, EDX, and H2-TPR. In the CO oxidation test, CuFeOx/OMS-2 had slightly higher catalytic activity but is significantly more stable than CuMnOx/OMS-2 and CuO/OMS-2. Due to its lower
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Experimental Investigation of Chemical Flooding Using Nanoparticles and Polymer on Displacement of Crude Oil for Enhanced Oil Recovery Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-07-23 Imran Akbar; Hongtao Zhou; Wei Liu; Muhammad Usman Tahir; Asadullah Memon; Ubedullah Ansari; Fengzhang Lv
In the petroleum industry, the researchers have developed a new technique called enhanced oil recovery to recover the remaining oil in reservoirs. Some reservoirs are very complex and require advanced enhanced oil recovery (EOR) techniques containing new materials and additives in order to produce maximum oil in economic and environmental friendly manners. In this work, the effects of nanosuspensions
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Brilliant Green Dye Biosorption Using Activated Carbon Derived from Guava Tree Wood Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-07-20 R. A. Mansour; Abeer El Shahawy; A. Attia; Mokhtar S. Beheary
The removal of brilliant green (BG) dye from an aqueous solution using activated carbon (AC) derived from guava tree wood is conducted in batch conditions. The influence of different factors such as contact time, pH, adsorbent dosage, initial dye concentration, and temperature on the adsorption of BG onto AC was investigated. FTIR, BET, and SEM analyses were performed to determine the characteristics
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Ethylene-Vinyl Acetate Copolymer/Crude Gossypol Compositions as Pour Point Depressants for Waxy Oil Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-06-23 Bekaidar T. Marenov; Kazim S. Nadirov; Manap K. Zhantasov; Rashid K. Nadirov
Wax deposition from crude oil that blocks the pipeline and increases the viscosity of the fluid is considered as a serious challenge for petroleum transportation. Employment of chemical additives, the so-called pour point depressants (PPDs), is widely used to solve this problem. Among them are the ethylene-vinyl acetate (EVA) copolymers (EVAc), containing a polyethylene segment along the backbone with
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Adsorptive Desulfurization of Organic Sulfur from Model Fuels by Active Carbon Supported Mn (II): Equilibrium, Kinetics, and Thermodynamics Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-06-16 Jianhong Wang; Qi Zhang; Hao Yang; Congzhen Qiao
Mn (II)/AC adsorbents were prepared by ultrasonic impregnation. The 2 wt. % Mn/AC showed best adsorptive performance, and the optimal adsorption temperature was 313 K. Benzene, methylbenzene, and naphthalene were used to explore the adsorptive selectivity of Mn/AC, indicating that Mn could enhance the adsorptive capacity but could not improve the adsorptive selectivity. The adsorptive mechanism was
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The COD Removal of Lime and Subsequent Acid Pretreated Partially Stabilised Leachate via Granular-Activated Carbon Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-05-15 Lennevey Kinidi; Shanti Faridah Salleh
Background. This paper investigated the effectiveness of lime treatment and subsequent acid precipitation (using H2SO4) as a pretreatment of partially stabilised leachate. This study obtained high removal efficiencies (>70%) from the lime and acid pretreated partially stabilised leachate. The treatment of this wastewater with 10 g/L dosage of optimum lime (pH 12) at 25°C had led to the 41% COD elimination
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Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-03-16 Nadia Hussain; Salam Alwan; Hassan Alshamsi; Ibrahim Sahib
In this paper, green and facile synthesis of sulfur- and nitrogen-codoped carbon nanospheres (CNs) was prepared from the extract of Hibiscus sabdariffa L by a direct hydrothermal method. Finally, sulfur-carbon nanospheres (CNs) were used as the adsorbent to remove Pb+2 ions from aqueous solutions because of the high surface area of S-CNs from CNs and N-CNs. The synthesized nanospheres were examined
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Effects of the Amount of Fly Ash Modified by Stearic Acid Compound on Mechanical Properties, Flame Retardant Ability, and Structure of the Composites Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-03-01 Tuan Anh Nguyen
Fly ash, a waste product from thermal power plants, is one of the good alternatives for use as a filler in polymers, especially in flame retardants. Fly ash is an environmentally friendly fire retardant additive for composites, used in place of conventional flame retardant additives such as halogenated organic compounds, thus promoting environmental safety. In this study, fly ash was modified with
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CO2 Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME) Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-02-22 Sutrasno Kartohardjono; Bayu Sari Adji; Yuswan Muharam
Increase in the world energy demand also increases the concentration of CO2 in the atmosphere, which contributes to global warming and ocean acidification. This study proposed the simulation process to utilize CO2 released from the acid gas removal unit in one of gas processing plants in Indonesia to enhance the production of dimethyl ether (DME) through unreacted gas recycle that can be beneficial
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Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-02-14 Hamid Saufi; Marouane El Alouani; Saliha Alehyen; Mohammed El Achouri; Jilali Aride; M’hamed Taibi
In this work, geopolymer synthesized with perlite and an alkaline activator medium was evaluated as a new adsorbent and photocatalyst for degradation of methylene blue (MB) dye from an aqueous medium. The functional group, the structure, and the morphology of the raw and the synthesized materials were characterized using FT-IR, XRD, and SEM analysis. The degradation of MB in the contaminated solution
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Bioconversion of Agroindustrial Waste in the Production of Bioemulsifier by Stenotrophomonas maltophilia UCP 1601 and Application in Bioremediation Process Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-01-31 Ianne Batista Nogueira; Dayana Montero Rodríguez; Rosildeide F. da Silva Andradade; Amanda Barbosa Lins; Ana Paula Bione; Israel Gonçalves Sales da Silva; Luciana de Oliveira Franco; Galba M. de Campos-Takaki
This study investigated the potential of the bacterium Stenotrophomonas maltophilia UCP 1601 to produce a new biomolecule with emulsifying properties by determining the hemolytic activity, obtaining a halo of 9 mm in blood agar. Fermentations were carried out in saline mineral medium supplemented with 10% waste soybean oil (WSO) and different concentrations of glucose, peptone, ZnCl2, and MgSO4, according
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Kinetic Models for Glucosamine Production by Acid Hydrolysis of Chitin in Five Mushrooms Int. J. Chem. Eng. (IF 1.877) Pub Date : 2020-01-11 Pin Zhang; Manote Sutheerawattananonda
In this paper, glucosamine was produced by acid hydrolysis of five mushrooms. The glucosamine yields were investigated, and the optimum conditions were obtained as follows: acid type, sulfuric acid; acid concentration, 6 M; ratio of raw material to acid volume, 1 : 10; hydrolysis temperature, 100°C; and time, 6 h. Under these conditions, the glucosamine conversion from chitin content reached up to
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Dynamic Simulations of the Allam Cycle Power Plant Integrated with an Air Separation Unit Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-12-07 Dan Fernandes; Song Wang; Qiang Xu; Daniel Chen
The unprecedented rise in carbon dioxide levels due to anthropogenic activities, if left unchecked, can lead to increased global warming. Electricity and heat generation account for around 25% of this greenhouse gas emission. The Allam cycle, a new oxy-fuel power cycle that emits virtually no CO2 and NOx, is inherently integrated with an air separation plant. In this study, Aspen Plus Dynamics was
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Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-12-01 Quang-Minh Nguyen; Duy-Cam Bui; Thao Phuong; Van-Huong Doan; Thi-Nham Nguyen; Minh-Viet Nguyen; Thien-Hien Tran; Quang-Trung Do
The effect of copper, zinc, chromium, and lead on the anaerobic co-digestion of waste activated sludge and septic tank sludge in Hanoi was studied in the fermentation tests by investigating the substrate degradation, biogas production, and process stability at the mesophilic fermentation. The tested heavy metals were in a range of concentrations between 19 and 80 ppm. After the anaerobic tests, the
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One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-11-27 Cornelius Tsamo; Abba Paltahe; Daniel Fotio; Tore Atangana Vincent; Wassansa Francois Sales
Water pollution by heavy metals like Co(II) is particularly of concern because of their persistence in the environment, toxicity, and ability to bioaccumulate in organisms. In this study, the influence of contact time at three initial concentration, pH, adsorbent dose, temperature, and kinetics, thermodynamics, and one-, two-, and three-parameter isotherm modeling of the adsorption of Co(II) on neem
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Fatty Acid Content in Biomasses: State-of-the-Art and Novel Physical Property Estimation Methods Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-11-23 Ana M. Sousa; Thalles A. Andrade; Massimiliano Errico; José P. Coelho; Rui M. Filipe; Henrique A. Matos
In line with the growing environmental awareness developed along the last decades, modern societies are urged to evolve into sustainable economics where the reuse of organic wastes represents the key feedstock for a green transaction. The oil phase obtained from different biomasses has the potential to be a source of food supplements, medicines, cosmetics, or feedstock for biofuel production. In the
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A Modified Model for Kinetic Analysis of Petroleum Coke Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-11-03 Iman Eslami Afrooz; Dennis Ling Chuan Ching
In this study, a nonisothermal kinetics analysis of petcoke was performed at heating rates of 10, 15, and 20°C/min using thermal gravimetric analysis (TGA). The behaviour of petcoke at different gasification stages (dewatering, volatilization, char burning, and burnout) was studied. The effect of heating rate on the activation energy of petcoke gasification was also investigated. The activation energy
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Simulation and Sensitivity Analysis of Molybdenum Disulfide Nanoparticle Production Using Aspen Plus Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-10-28 Mouad Hachhach; Hanane Akram; Mounir Hanafi; Ouafae Achak; Tarik Chafik
The sensitivity analysis of molybdenum disulfide nanoparticles synthesis process is studied using Aspen Plus with the aim of investigating the effect of reactants’ amounts on the production of molybdenum disulfide nanoparticles. The adopted approach consists in simulating the synthesis process based on experimental data, obtained at laboratory scale followed by sensitivity analysis with respect to
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Correlation of Power Consumption of Double Impeller Based on Impeller Spacing in Laminar Region Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-10-16 Haruki Furukawa; Toshiki Kamiya; Yoshihito Kato
Power consumption is an important parameter for the design of mixing equipment. The aim of this study is to develop a new correlation of the power consumption of a double impeller. The effect of impeller spacing on the double-impeller flow pattern and power consumption was investigated in the laminar region. As a result, the effect of impeller spacing on the flow pattern was described based on the
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Deposition of Colloidal Particles during the Evaporation of Sessile Drops: Dilute Colloidal Dispersions Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-10-03 Pei-Fang Sung; Lihui Wang; Michael T. Harris
The deposition of colloidal silica particles during the evaporation of sessile drops on a smooth substrate has been modeled by the simultaneous solution of the Navier–Stokes equations, the convective-diffusive equation for particles, and the diffusion equation for evaporated vapor in the gas phase. Isothermal conditions were assumed. A mapping was created to show the conditions for various deposition
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Physical and Rheological Properties of Egg Albumin Foams Are Affected by Ionic Strength and Basil Seed Gum Supplementation Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-09-10 Saeed Mirarab Razi; Ali Motamedzadegan; Seyed-Ahmad Shahidi; Ali Rashidinejad
In this study, the effect of ionic strength and basil seed gum (BSG) on the foaming properties of egg white albumin (EWA) was studied. The foam was prepared with 1% EWA (w/v) in the presence of different concentrations of sodium chloride (NaCl; 0, 0.5, and 1% w/v) and BSG (0, 0.1, and 0.3% w/v). The results showed that foam density and foam stability of EWA significantly () increased with an increase
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Assessment of the Use of Epicarp and Mesocarp of Green Coconut for Removal of Fluoride Ions in Aqueous Solution Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-09-02 César Augusto Canciam; Nehemias Curvelo Pereira
Fruit consumption and processing result in considerable volumes of residual biomass. Transformation of this biomass into biosorbents offers an alternative for its reuse and disposal. As the green coconut shell is a waste often discarded in landfills and dumps, generating gases and leachate, two biosorbents were developed from the epicarp and mesocarp of green coconut to adsorb fluoride ions in aqueous
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Computational Fluid Dynamics Study of the Effects of Drill Cuttings on the Open Channel Flow Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-08-22 Prasanna Welahettige; Christian Berg; Joachim Lundberg; Bernt Lie; Knut Vaagsaether
A three-dimensional computational fluid dynamics (CFD) study was carried out for drilling fluid flow with drill cuttings in open channels. The flow is similar to the return flow when drilling, stream containing drilling fluid, and drill cuttings. The computational model is under the framework of the Eulerian multifluid volume of the fluid model. The Herschel–Bulkley rheological model was used to describe
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Qualitative and Quantitative Analysis of Graphene-Based Adsorbents in Wastewater Treatment Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-07-04 P. Jayakaran; G. S. Nirmala; L. Govindarajan
Nowadays water bodies across the world are heavily polluted due to uncontrollable contamination of heavy metal particles, toxic dyes, and other harmful wastes discharged by emerging industries other than normal domestic wastages. This contamination needs sufficient control to protect the natural water bodies. There are various methodologies to be followed to perform wastewater treatment, in which the
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Preparation and Characterization of a New High-Performance Plastic Explosive in Comparison with Traditional Types Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-07-02 Ahmed Elbeih; Tamer Elshenawy; Hany Amin; Ahmed K. Hussein; Sara M. Hammad
EPX-2R is a high-performance plastic explosive produced for different applications. EPX-2R is based on RDX (1,3,5-trinitro-1,3,5-triazinane) bonded by the elastic matrix of the softened styrene butadiene binder. A computerizing mixer plastograph was used for the production of EPX-2R. The internal energy of combustion was measured and used to determine the enthalpy of formation. Friction and impact
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Chemical Oxidation for Oil Separation from Oilfield Produced Water under UV Irradiation Using Titanium Dioxide as a Nano-Photocatalyst by Batch and Continuous Techniques Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-06-24 Ali A. Hassan; Khalid M. Mousa Al-zobai
This research describes the photocatalytic design for oil removal from produced water. It involves batch and continuous processes. The photocatalytic degradation of oil has been conducted in glass reactors. The effects of nano-TiO2 concentration, the number of lamps, and the time of radiation were studied in the batch system, while in the continuous treatment, the number of lamps, the direction of
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Evaluation of Distribution of Succinic Acid between Binary Phase System with Biodiesel + N,N-Dioctyloctan-1-amine Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-06-18 Sunder Lal Pal; Shourabh Singh Raghuwanshi; Kanti Kumar Athankar; Ashwani Kumar Rathore
The present study is aimed at using one of the most promising methods called reactive extraction to extract succinic acid from aqueous solution by using N,N-dioctyloctan-1-amine in biodiesel as diluent made from sunflower oil, rice bran oil, sesame oil, and karanji oil. The results of extraction studies with the diluents (physical) showed their inability to recover any acid by themselves. In reactive
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Sugarcane Bagasse Ash Micronized Using Air Jet Mills for Green Pozzolan in Brazil Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-23 Rafael G. D. Molin Filho; Jaciele M. Rosso; Eduardo A. Volnistem; Romel D. Vanderlei; Leda M. S. Colpini; Mateus M. Ferrer; Paulo R. Paraíso; Luiz M. de M. Jorge
This study provided a basis for new possibilities concerning the use of the sugarcane bagasse ash as a green pozzolanic addition to the Portland cement composite. To that effect, a simple micronization method using air jet milling without any other additional thermal procedure was used to control the characteristics of ash particles. This procedure not only maintains the required characteristics of
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A Moving Boundary Model for Isothermal Drying and Shrinkage of Chayote Discoid Samples: Comparison between the Fully Analytical and the Shortcut Numerical Approaches Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-16 Alessandra Adrover; Antonio Brasiello
A moving boundary model for food isothermal drying and shrinkage is applied to predict the time decay of water content and sample volume, as well as water diffusivity for chayote discoid slices in the temperature range 40–70°C. The core of the model is the shrinkage velocity , assumed equal to the water concentration gradient times a shrinkage function α representing the constitutive equation of the
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VLE of Carbon Dioxide-Loaded Aqueous Potassium Salt of L-Histidine Solutions as a Green Solvent for Carbon Dioxide Capture: Experimental Data and Modelling Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-13 Afaf Syalsabila; Abdulhalim Shah Maulud; Humbul Suleman; Nik Abdul Hadi Md Nordin
In this study, vapour-liquid equilibrium of CO2-loaded aqueous potassium salt of L-histidine was studied for a wide range of temperature (313.15–353.15 K), pressure (150–4000 kPa), and solvent concentrations (1–2.5 molar). The experimental results show that L-histidine has an excellent absorptive capacity for carbon dioxide. When compared to conventional solvent (monoethanolamine) and amino acid salt
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Column Efficiency of Fluoride Removal Using Quaternized Palm Kernel Shell (QPKS) Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-12 Ayu Haslija Abu Bakar; Luqman Chuah Abdullah; Nur Amirah Mohd Zahri; Ma’an Alkhatib
In this research, the adsorption potential of quaternized palm kernel shell (QPKS) to remove F− from aqueous solution was investigated using fixed-bed adsorption column. Raw palm kernel shell waste was reacted with 3-chloro-2-hydroxypropyl trimethylammonium chloride (CHMAC) in order to modify the surface charge. The effects of inlet F− concentrations (2–12 mg/l) and QPKS bed height (2–10 cm) with optimum
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Fire-Extinguishing Efficiency of Superfine Powders under Different Injection Pressures Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-02 Guomin Zhao; Guangji Xu; Shuang Jin; Qingsong Zhang; Zhongxian Liu
Ammonium phosphate fire-extinguishing agents are one of the best substitutes for halon in many powder media. Here, 11 μm median diameter ammonium phosphate ultrafine dry powder was used as a fire-extinguishing medium. The fire-extinguishing performance of ultrafine powder under different pressures was studied by analyzing fire-extinguishing time, amount of extinguishing agent, and temperature during
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Chemical-Enhanced Oil Recovery Using N,N-Dimethylcyclohexylamine on a Colombian Crude Oil Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-02 Diego R. Merchan-Arenas; Cindy Carolina Villabona-Delgado
Oil recovery was improved using the tertiary amine, N,N-dimethylcyclohexylamine (DMCHA), a powerful and promissory switchable solvent, in simulated conditions similar to the Colombian crude oil reserves. Firstly, the Colombian crude oil (CCO) and the soil were characterized completely. Afterwards, an aged crude-rock system was obtained to use DMCHA that gave an oil crude extraction of 80% in our preliminary
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Utilization of Synthesized Zeolite for Improved Properties of Pyrolytic Oil Derived from Used Tire Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-02 Julius I. Osayi; Peter Osifo
This paper reports the investigation of zeolite NaY synthesized from kaolin, a locally abundant soil material found in the Benin City metropolis, Nigeria, as a suitable catalyst and its effect on the properties of pyrolytic oil produced from used tires. The pyrolysis process was conducted from a range of 1 to 10 wt.% of catalyst concentration to the used tire at an operating temperature of 600°C, heating
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Predicting CO2 Permeation through an Enhanced Ionic Liquid Mixed Matrix Membrane (IL3M) Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-02 Dzeti F. Mohshim; Hilmi Mukhtar; Binay K. Dutta; Zakaria Man
Ionic liquid mixed matrix membranes (IL3Ms) were synthesized using polyethersulfone (PES) as the base polymer and silica-aluminophosphate (SAPO-34) as the dispersed particles, and their CO2 permeation was investigated. Three of the most widely used models for gas separation—the Maxwell, Lewis–Nielson, and Maxwell–Wagner–Sillar (MWS) models—were then applied to the membranes. Large deviations were found
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Biosynthesis and Characterization of Iron Nanoparticles for Effective Adsorption of Cr(VI) Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-05-02 Emel Simla Önal; Tolga Yatkın; Tural Aslanov; Memduha Ergüt; Ayla Özer
In this study, iron nanoparticles (FeNPs) were synthesized via a green method using loquat (Eriobotrya japonica) leaves aqueous extract as a renewable reducing agent. The synthesized FeNPs were characterized by DLS, XRD, FT-IR, SEM/EDX, and TEM analysis, and then, they were used as an adsorbent for Cr(VI) removal from aqueous solutions. Batch adsorption experiments were carried out to investigate the
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Pressure Drop in Plate Heat Exchangers for Single-Phase Convection in Turbulent Flow Regime: Experiment and Theory Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-04-09 Sergej Gusew; René Stuke
Plate heat exchangers (PHEs) play an important role in different technical fields, namely, in energetics, chemical industry, food industry, and others. To use PHE effectively, it is necessary to have correct data for pressure drop. Unfortunately, in open literature, a large difference among different authors occurs. In this work is shown that an essential portion of this difference lies in the choice
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Pretreatment Strategies to Improve Crude Glycerol Utilisation and Metabolite Production by Aspergillus terreus Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-04-01 Muhamad Hafiz Abd Rahim; Hanan Hasan; Elicia Jitming Lim; Phebe K. Samrani; Ali Abbas
Crude glycerol (CG) can be used as a substrate for microbial bioconversion. However, due to presence of many impurities, many microorganisms are unable to utilise this substrate efficiently. The present study is trying to improve CG using as the feedstock of Aspergillus terreus for the production of lovastatin, (+)-geodin, and sulochrin. The CG was pretreated chemically (solvents) and physically (activated
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A Framework and Numerical Solution of the Drying Process in Porous Media by Using a Continuous Model Int. J. Chem. Eng. (IF 1.877) Pub Date : 2019-04-01 Hong Thai Vu; Evangelos Tsotsas
The modelling and numerical simulation of the drying process in porous media are discussed in this work with the objective of presenting the drying problem as the system of governing equations, which is ready to be solved by many of the now widely available control-volume-based numerical tools. By reviewing the connection between the transport equations at the pore level and their up-scaled ones at
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