样式: 排序: IF: - GO 导出 标记为已读
-
Catalytic thermolysis at atmospheric pressure followed by adsorption in treatment of coking wastewater Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-28 Vibha Verma,Nishant Joshi,Jaiprakash Kushwaha,Santosh Bahadur Singh,Prabir Ghosh,Parmesh Kumar Chaudhari
Abstract Wastewater generated from the coking processes has high load of organic as well as inorganic pollutants which requires the application of effective treatment techniques. In the present work, treatment of coking wastewater (CWW) through catalytic thermolysis has been carried out in batch mode with varying parameters such as type of catalyst, catalyst mass loading, pH, temperature and time.
-
Bubble behavior and evolution characteristics in the RH riser tube-vacuum chamber Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-21 Yihong Li,Hongwei Zhu,Rui Wang,Zhifeng Ren,Yibo He
Abstract The motion behavior of bubbles in a riser tube is studied in order to analyze the bubble evolution characteristics. Gas distribution and bubble movement in risers and vacuum chambers have important effects on liquid steel flow, mixing and refining process. It is found that the initial diameter of argon bubbles in the riser tube decreased with decreasing vacuum degree. The diameter of argon
-
Pseudo-dynamic optimisation and study of the effect of gradual and sudden changes on the operating conditions of a naphtha catalytic reforming unit Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-20 Farangis Fallah Mehneh,Sorood Zahedi Abghari,Neda Gilani,Khashayar Yaghoubi
Abstract Naphtha catalytic reforming is a key process for oil refining in terms of production of gasoline with a high octane number. In the present research, the gradual and sudden effect of operating conditions changes on the products of the catalytic reforming unit and the octane number, as well as how to neutralize their negative effects were investigated. Also, kinetic parameter optimisation and
-
A cross-mixing channel 3D-SAR micromixer with high mixing performance Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-15 Liqiang Zhang,Sicheng Yu,Zhou Hu,Chenxi Zhu,Jiakang Shi,Abubakar Ahmad Babangida,Daohan Ge
Abstract As an important part of laboratory-on-a-chip (LOC) and micro-total analysis system (μTAS), micromixers are widely used in the fields of biological analysis and chemical synthesis. Most of them are used for the pretreatment of the detection and analysis system to realize the full mixing between the sample and the target to improve the accuracy of the inspection system. A new type of 3D-SAR
-
The photocatalytic degradation kinetics of the anti-inflammatory drug ibuprofen in aqueous solution under UV/TiO2 system and neural networks modeling Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-14 M. Bennemla,S. Bouafia-Chergui,A. Amrane,M. Chabani
Abstract In this study, the kinetic degradation of the anti-inflammatory drug Ibuprofen in aqueous solution by heterogeneous TiO2 photocatalytic was investigated. The data obtained were used for training an artificial neural network. Preliminary experiments of photolysis and adsorption were carried out to assess their contribution to the photocatalytic degradation. Both, direct photolysis and adsorption
-
Numerical simulation of iron ore sintering process with coke oven gas injection and oxygen enrichment Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-12 Wenjie Ni,Lili Jiang,Xiaofeng Zhu,Xin Yi,Haifeng Li,Lei Shao,Fanchao Meng,Zongshu Zou
Abstract Oxygen enrichment is believed to improve productivity and reduce fuel consumption, while gas fuel injection is assumed to improve the product yield and quality in iron ore sintering process. It is important to understand the mutual effect of oxygen enrichment and gas fuel injection for combined usage of these two techniques. A mathematical model is developed to simulate the sintering process
-
Effects of zinc chloride impregnation states on specific surface and dielectric properties of activated carbons Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-12 Shu Hui Tang,Lin Zhi Lee,Vanissa Sandra Andrew,Aiman Rashidi Mohd Akhmar,Muhammad Abbas Ahmad Zaini
Abstract The present work was aimed at evaluating the roles of zinc chloride impregnation states on specific surface and dielectric properties in microwave-assisted activated carbon preparation. Activated carbons were synthesized using castor shell at dry impregnation ratios of 1 and 2 (material-to-activator), and in suspensions of distilled water and zinc chloride, at power intensity of 800 W and
-
High-efficiency, environment-friendly moss-enriched microbial fuel cell Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-11 Nurettin Çek,Ahmet Erensoy,Namık Ak,Ayhan Demirbas,Ahmet Orhan Gorgulu,Hasan Uslu
Abstract Microbial fuel cells (MFCs) can be used to produce clean energy from organic wastes. Various biomasses for MFCs can be used as biofuel materials. Moss (Bryophyta) is a source of biomass materials and can be used as an alternative fuel for microbial fuel cells. In this study, moss-enriched MFCs were produced by using moss as a biofuel source and aluminum and silver as an electrode. As a result
-
Experimental and simulation studies of a continuous reactive distillation for an esterification process Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-04 Mallaiah Mekala
Abstract Esterification of acetic acid and methanol to produce methyl acetate and water has been studied in a continuous packed bed catalytic reactive distillation column. Indion 180, an ion-exchange resin solid catalyst has loaded in an equivalent Katapak-S into the reactive section of the column. The experiments were conducted under different operating conditions of reboiler temperature, total feed
-
Preface: Special issue of “Multiphase Flows in Process Engineering: Recent Experimental, Theoretical and Numerical Developments” Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-01 Shuli Shu,Xizhong Chen,Zhenghong Luo,Jamal Chaouki
-
Applying metal coatings to dielectric materials by photochemical processes Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-01 Shayzada Koshkarbaeva,Vasilya Janpaizova,Kalamkas Amanbaeva,Malik Sataev,Perizat Abdurazova,Bagdagul Serikbaeva,Yerkebulan Raiymbekov
Abstract Photochemical processes in thin surface layers of solutions of compounds of the copper subgroup elements leading to the formation of dispersed metal particles on the surface of dielectrics are investigated. It is shown that dispersed particles of elemental gold are formed on dielectrics moistened with AuCl3 solution and exposed to sunlight. At the same time, there is no need to use any chemical
-
3D virtual full-loop CFD simulation of industrial two-stage FCC reaction–regeneration system Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-01 Hanbin Zhong,Jing Chen,Fei Gao,Juntao Zhang,Yuqin Zhu,Ben Niu
Abstract The 3D virtual full-loop CFD simulation method with two-fluid model (TFM) was developed to model an industrial two-stage FCC reaction–regeneration system. The virtual connections (mass, species, and energy) between riser reactors, disengager, stripper, and regenerator were realized by defining user-defined functions (UDFs) for boundary conditions according to the reality. Five correction factors
-
Floating particles mixing characteristics in an eccentric stirred tank coupled with dislocated fractal impellers Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-04-01 Deyin Gu,Xin Li,Yi Wang,Hui Xu,Mei Ye,Li Wen
Abstract The mixing characteristics of floating particle dispersion process in an eccentric stirred tank with dislocated fractal impellers were investigated using computational fluid dynamics (CFD) and experimental analyses. Solid concentration distribution, axial solid concentration profile, cloud height, solid integrated velocity, power consumption and just drawdown speed were investigated. Results
-
Analysis of nozzle clogging position in a continuous casting mold Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-30 Li Jinbo,Zhang Tao,Gao Fubin,Gong Yankun,Zhou Dan
Abstract In this paper, the flow field of the submerged entry nozzle (SEN) in the continuous casting process is analyzed in detail by numerical simulation. It is found that the front and rear positions of the SEN outlets and the bottom of the nozzle are prone to the accumulation of inclusions. Compared with the actual SEN, the clogging positions with the simulated results are consistent. The composition
-
Hydrodynamics and mixing performance in a continuous miniature conical counter-rotating twin-screw extruder Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-21 Sicheng Xin,Wenkai Cheng,Lisen Yang,Yaran Yin,Shichang Chen,Xianming Zhang,Wenxing Chen
Abstract The mixing performance in a miniature conical counter-rotating twin-screw extruder was investigated by means of experimental technique and computational fluid dynamics (CFD) simulation. An on-line experimental device based on the fluorescence detection was built to study the residence time distribution (RTD). Polypropylene was selected as the flow material and the blend of Polypropylene and
-
Modeling of methane Tri-reforming slurry bubble column reactor via differential evolution optimization method to produce syngas Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-16 Zahra Arab Aboosadi,Ehsan Dehghanfard,Meysam Abdosheikhi
Abstract Tri-reforming process of methane has been considered as an important chemical process for syngas production. The aim of this study is modeling and optimization of methane Tri-reforming slurry bubble column reactor (SBCR). A one-dimensional heterogeneous model with plug flow pattern for gas phase and an axial dispersion pattern for liquid-solid suspension has been developed for modeling of
-
Experimental study on the scale-up of a multi-ring inclined nozzle spout-fluid bed by electrical capacitance tomography Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-14 Zhao Chen,Lin Jiang,Xu Yang,Zebing Liu,Rongzheng Liu,Bing Liu,Youlin Shao,Malin Liu
Abstract Scale-up studies of fluidized beds are important for numerous fields. Fluidization in a multi-ring inclined nozzle spout-fluid bed (MRIN spout-fluid bed) is one of the most critical factors that affect the coating efficiency and uniformity of tri-structural isotropic (TRISO) nuclear particles in the fluidized bed chemical vapor deposition (FB-CVD) process. In this work, the flow pattern similarity
-
Tuning parameters for the synthesis of MIL-53(Al): Mn doped MIL-53(Al) as a high potential catalyst for methanol dehydration Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-07 Nasrin Kazemzadeh,Rouein Halladj,Sima Askari,Raza Kia
Abstract Recently, many studies are dealing with developments of Metal-Organic Frameworks (MOFs), especially MIL-53(Al), which shows high thermal and mechanical stability. Among these, optimizing the synthesis condition of MIL-53(Al) to obtain appropriate characteristics has attracted much attention in academia and the industry. Here, the effect of synthesis time and ligand to metal molar ratio on
-
Co-immobilization of glucose oxidase and catalase in porous magnetic chitosan microspheres for production of sodium gluconate Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-07 Youcai Liu,Pengpeng Zou,Juan Huang,Jun Cai
Abstract In the process of immobilizing the enzyme, the overflow of enzyme and the decrease of enzyme activity are very serious. In order to improve the stable binding between enzyme and carrier, a kind of porous magnetic chitosan microsphere with appropriate pore size was successfully prepared by adjusting the size of pore-forming agent in this paper. The rough porous structure is favorable for the
-
Three-dimensional carbon architectures with O doping and rich defects for catalytic conversion of polysulfides Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-03-04 Xue Yang,Zhiming Du,Zhiping Lei,Hengfu Shui,Song Han,Honglei Yan,Jingchong Yan,Zhanku Li,Zhicai Wang,Shibiao Ren,Ying Kong,Shigang Kang
Abstract To deal with the notorious shuttle behavior and sluggish conversion of lithium polysulfides (LiPSs), heteroatoms doping and defects creating are practical strategies for improving capture and catalytic conversion of LiPSs. In this work, O doped porous carbon materials (OPC) with a 3D hierarchical structure, consisting of 2–4 μm carbon sheets decorated with macrospores of 0.2–0.4 μm, was fabricated
-
The relationship between melt structure and viscosity: the effect of different fluxes on CaO–SiO2 slags Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-22 Xiaobo Zhang,Chengjun Liu,Maofa Jiang
Abstract Na2O, CaF2, B2O3 are commonly used fluxes in metallurgical slags. These fluxes reduce the viscosity of slags are related to changing the melt structures. In this study, molecular dynamics simulation was used to analyze the main effects of Na2O, CaF2, and B2O3 respectively on the melt structure of the traditional CaO–SiO2 metallurgical slags. The results showed that since Na+ ions have only
-
Activated sludge bio-aerobic process to treat sugar industry effluent Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-22 Shreyas Gondudey,Vandana Gupta,Prabir Ghosh,Pramesh Kumar Chaudhari
Abstract The sugar industry effluent (SIE) is characterized as high organic load. The aim of this study is to treat SIE by bio-aerobic process in batch and continuous mode in bio-aeration reactor. In batch process, effect of hydraulic retention time (HRT) in terms of effluent fill volume, and in continuous process, effect of HRT in terms of effluent feed rate was studied. In batch process, HRT of 2
-
CFD simulation of a swirling vortex cavitator and its degradation performance and pathway of tetracycline in aqueous solution Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-11 Baoe Wang,Rihong Zhang,Yiyong Li,Xiaoming Lian
Abstract The vortex cavitation technology shows a great development potential for antibiotic wastewater treatment. We have designed a novel swirling vortex cavitator for tetracycline degradation in aqueous solution. By Computational Fluid Dynamics (CFD) simulation using ANSYS CFX flow field calculation software, it was found that the vortex cavitator could form a low-pressure area far lower than the
-
Effects of flue gas recirculation on nitrogen oxide formation in 1000 MW S-CO2 coal-fired boiler with partial expansion furnace Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-04 Ming-yan Gu,Jin-yan Yuan,Ming-ming Wang,Ji-min Wang,Xiang-yong Huang,Hua-qiang Chu
Abstract Since the heat transfer coefficient of supercritical carbon dioxide (S-CO2) is approximately 1/2–2/3 of traditional steam boiler, the S-CO2 boiler structure, cooling wall arrangement and combustion system is different from traditional boiler configuration. This paper takes a 1000 MW S-CO2 coal-fired boiler with partial expansion furnace and partial flow strategy arrangement for cooling wall
-
Experiments on liquid film thickness around Taylor finger Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Amit Kumar,Amit K. Thakur,Gajendra Kumar Gaurav,Narasimha Reddy Ravuru
Abstract Taylor finger is characterized by a single elongated air bubble that grows upward during the drainage of liquid from closed top vertical tubes. The characteristic of the Taylor finger is similar to the Taylor bubble commonly observed in gas–liquid two-phase flow. During the upward growth of the Taylor finger, liquid from the tube drains as a thin film around it. The exact prediction of film
-
Frontmatter Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01
Article Frontmatter was published on February 1, 2022 in the journal International Journal of Chemical Reactor Engineering (volume 20, issue 2).
-
CFD research on the influence of geometry characteristic on flow pattern and the transition mechanism in Rushton turbine stirred vessels Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Yinghui Wang, Lin Hao, Zhenxing Zhu, Jinjie Xu, Hongyuan Wei
In this paper, the transient MRF approach coupled with the standard k - ε and SST k - ω turbulence models was employed to study the effect of bottom shape, impeller diameter ( D J ) and bottom height ( H 2 ) on critical impeller off-bottom clearance ( C ). It was found the bottom shape and bottom height ( H 2 ) have obvious influence on the flow pattern transition from double-loop to single-loop of
-
Insight on micro bubbling mechanism in a 2D fluidized bed with Group D particles Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Fengguo Tian, Shulei Liu, Zifeng Zhao, Ming Lei
By CFD-DEM simulations, the present work is aimed to investigate the transient gas-solid bubbling mechanisms along a whole bubble lifecycle in a 2D fluidized bed from a micro perspective. Systemic comparisons with CCD measurements confirm the validity of current simulations. Afterward, the manner of particle motion and its driving mechanisms at various stages are investigated. In order to do that,
-
Parametric optimization of a coiled agitated vessel with TiO2/water nanofluid Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Perarasu Thangavelu
An effective procedure of response surface methodology (RSM) has been successfully developed for a coiled agitated vessel by finding the optimal values of working parameters to achieve the high heat transfer performance. Studies have been performed for two types of agitators, propeller and disk turbine respectively. TiO 2 /water nanofluid has been used as agitated medium. Various operating parameters
-
Highly efficient photo-degradation of cetirizine antihistamine with TiO2-SiO2 photocatalyst under ultraviolet irradiation Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Sonam Rani, Alok Garg, Neetu Singh
Photocatalysis is an extraordinary and vastly researched topic; there is a need to find new ways to support producing composite materials that are cost-effective, efficient and have a low environmental impact. The investigation was undertaken on syn TiO 2 by depositing it on silica. The results elucidate the positive effect on photocatalysis activity and the macroscopic structure on which the TiO 2
-
DEM study of the angle of repose and porosity distribution of cylindrical particles with different lengths Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Heng Zhou, Xu Tian, Xingyu Guo, Mingyin Kou, Shengli Wu, Yansong Shen, Yang You
Effect of the length of cylindrical particle on repose angle and porosity of a pile was numerically studied using discrete element method. The variation of repose angle and porosity with coefficient of sliding and rolling friction were also discussed. The results shown that compared with sphere particle, the bottom size of cylindrical pile is smaller, while the height of cylinder pile is larger and
-
Analysis of flow pattern characteristics and strengthening mechanism of co-rotating and counter-rotating mixing with double impellers on different string shafts Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Haotian Li, Shibo Wang, Hua Wang, Jianxin Xu, Qingtai Xiao, Yuewei Fan
Based on two cases of the double impellers on different shafts in the co-rotating and counter-rotating, the distribution of the velocity, streamline, turbulent kinetic energy, and turbulent energy dissipation rate are obtained through three-dimensional unsteady numerical simulation. Very good agreements between experimental and numerical results have been obtained. The hydrometallurgy purification
-
Comprehensive evaluation of the blast furnace status based on data mining and mechanism analysis Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Yifan Hu, Heng Zhou, Shun Yao, Mingyin Kou, Zongwang Zhang, Li Pang Wang, Shengli Wu
As an industry with high energy consumption and high emission, the iron and steel industry not only drives the economic development, but also brings serious environmental pollution problems. In order to achieve green and low-carbon steel manufacturing, reducing CO 2 emissions in the blast furnace ironmaking process has become the current mainstream, of which the accurate judgment of the blast furnace
-
Performance enhancement of commercial ethylene oxide reactor by artificial intelligence approach Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Somnath Chowdhury, Sandip Kumar Lahiri, Abhiram Hens, Samarth Katiyar
The present work emphasizes the development of a generic methodology that addresses the core issue of any running chemical plant, i.e., how to maintain a delicate balance between profit and environmental impact. Here, an ethylene oxide (EO) production plant has been taken as a case study. The production of EO takes place in a multiphase catalytic reactor, the reliable first principle-based model of
-
Study of catalytic hydrogenation performance for the Pd/CeO2 catalysts Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Congming Tang, Yue Zhao, Tao Li, Zhengjiang Liao, Benjing Xu, Zhaojie Jiao, Guilin Zhou
Pd/CeO 2 catalysts with different metallic Pd loading were synthesized by impregnation method. The physicochemical properties of prepared Pd/CeO 2 catalysts and corresponding precursors were studied by XRD, XPS, H 2 -TPD and H 2 -TPR. Moreover, the catalytic performance of the Pd/CeO 2 catalysts was investigated via gas phase benzene hydrogenation reaction at the temperature of 100–200 °C under atmosphere
-
Performance of flow distribution in a microchannel parallel flow gas cooler with stepped protrusion depth header Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-02-01 Ke Wang, Jiaqi Liu, Zunchao Liu, Yongqing Wang, Dan Wang
Microchannel parallel flow gas cooler is commonly used in transcritical carbon dioxide automotive air conditioning system. To investigate the influence of the flat tube protrusion depth on fluid distribution, a numerical calculation model of microchannel parallel flow gas cooler with D-shaped header is established. With the object of even flow distribution, a novel stepped protrusion depth header is
-
Optimizing the two-stage adsorber of NaOH-activated coconut shell carbon for methylene blue removal Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-28 Ada Chu Wen Wong,Sirajo Lawal,Muhammad Abbas Ahmad Zaini
Abstract This work was aimed at optimizing the adsorbent mass and contact time and evaluating the performance of two-stage batch adsorber of NaOH-activated coconut shell carbon for methylene blue removal. To decrease the dye concentration from 1000 to 89.4 mg/L at any effluent volumes, the two-stage adsorber displays a small mass saving of 0.33% because of the high adsorbent affinity towards methylene
-
Process optimization and CFD simulation in external loop airlift reactor and sectionalized external loop airlift for application of wastewater treatment Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-20 Shivanand M. Teli,Channamallikarjun Mathpati
Abstract The industrial wastewater treatment is carried out in an external loop airlift reactor (EL-ALR) and sectionalized EL-ALR. The airflow rate is optimized in EL-ALR and sectionalized EL-ALR for better degradation of wastewater. The 74% degradation is obtained in sectionalized EL-ALR as compared to EL-ALR for continuous aeration up to 32 h. For higher superficial gas velocity (U G ) percentage
-
In honour of Dr. Orlando M. Alfano: researcher, engineer, and academic Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 María de los Milagros Ballari, Benito Serrano Rosales
Article In honour of Dr. Orlando M. Alfano: researcher, engineer, and academic was published on January 1, 2022 in the journal International Journal of Chemical Reactor Engineering (volume 20, issue 1).
-
Frontmatter Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01
Article Frontmatter was published on January 1, 2022 in the journal International Journal of Chemical Reactor Engineering (volume 20, issue 1).
-
Absorbed radiation and kinetic model in photocatalysis by TiO2 Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Bernardí Bayarri, Jaime Giménez, David Curcó, Santiago Esplugas
The current work studies a novel and affordable methodology to estimate and quantify the photon flux absorbed and the amount of light that leaves from an illuminated photocatalytic system with TiO 2 suspended in water. To achieve it, a new parameter B F S λ w a t $BF{S}_{\lambda }^{wat}$ is defined and presented. It indicates, for every wavelength, the fraction of the incoming radiation which is not
-
Co-processing of hydrodeoxygenation and hydrodesulfurization of phenol and dibenzothiophene with NiMo/Al2O3–ZrO2 and NiMo/TiO2–ZrO2 catalysts Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Jesús Andrés Tavizón Pozos, Gerardo Chávez Esquivel, Ignacio Cervantes Arista, José Antonio de los Reyes Heredia, Víctor Alejandro Suárez Toriello
The influence of Al 2 O 3 –ZrO 2 and TiO 2 –ZrO 2 supports on NiMo-supported catalysts at a different sulfur concentration in a model hydrodeoxygenation (HDO)-hydrodesulfurization (HDS) co-processing reaction has been studied in this work. A competition effect between phenol and dibenzothiophene (DBT) for active sites was evidenced. The competence for the active sites between phenol and DBT was measured
-
Radiative transfer in a Solar CPC Photoreactor using the First-Order Scattering Method Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Patricio J. Valades-Pelayo, Manuel A. Ramirez-Cabrera
This manuscript analyzes the suitability of a recently proposed numerical method, the First-Order Scattering Method (FOS), to describe radiation transfer in a Solar Compound Parabolic Collector Photoreactor (CPCP). The study considers five different irradiance conditions ranging from fully diffuse to fully direct solar radiation, with 90 and 45° angled rays. Three photocatalysts at different loadings
-
Selective hydrogenation of light cycle oil for BTX and gasoline production purposes Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Eli H. Olmos-Cerda, Georgina C. Laredo, Patricia Pérez-Romo, Ricardo Águeda-Rangel, Alfonso García-López
The study of the best experimental conditions and catalyst for the hydrogenation (HYD) of light cycle oil (LCO) for upgrading purposes was carried out. The objective was to examine the ability of two commercial hydrotreatment (HDT) catalysts for selective aromatic saturation. The effect of the hydrotreatment operation parameters (temperature, pressure, liquid hourly space velocity, H 2 /HC ratio) on
-
Unsteady state diffusion-adsorption-reaction. Selectivity of consecutive reactions on porous catalyst particles Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Juan Rafael García, Claudia María Bidabehere, Ulises Sedran
The simultaneous processes of diffusion, adsorption and chemical reaction, considering the transient nature of the concentration profiles in the porous catalyst particles as applied to the analysis of consecutive reactions A → B → C , where reactant and products are subjected to diffusion limitations, are analyzed. The concentrations of the desired intermediate product B , both the average in the catalytic
-
Photocatalytic degradation of acetaminophen from water solutions via thin films part I: preparation, characteriation, and analysis of titanium dioxide thin films Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Sunil Rawal, Sabrina H. Buer, Wayne Hawkins, Jonathan Robby Sanders, Pedro E. Arce
The utilization of titanium dioxide (TiO 2 ) photocatalysis for water and air purification is a frequently used method due to TiO 2 having properties making it chemically inert, highly cost-effective, abundant, non-toxic, and environmentally-friendly. In an effort to increase the efficiency of the degradation process, an in-depth understanding of the effects of the structure and number of thin film
-
Photocatalytic degradation of acetaminophen in water via ultraviolet light and titanium dioxide thin films part II: chemical and kinetic aspects Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Sunil Rawal, Sabrina H. Buer, J. Robby Sanders, Pedro E. Arce
Among the large family of emergent pharmaceutical contaminants, we find acetaminophen (ACE) that critically needs to be removed from wastewater. Advanced Oxidation Process (AOP) have proven effective in the degradation of large molecular contaminants from water. To the best of our knowledge this is the first study reported on the degradation of ACE based on immobilized TiO 2 thin films. In an effort
-
Ti-Co mixed oxide as photocatalysts in the generation of hydrogen from water Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Alejandro Pérez-Larios, Isabel Torres-Ramos, Rodolfo Zanella, José Luis Rico
The effect of Co into the titanium oxide matrix as photocatalysts in the generation of hydrogen from water is herein reported. Ti–Co mixed oxides and pure titania were synthetized by sol-gel. The Co content was 0, 1, 3, 5, and 10 wt.%. The solids were characterized by Scanning electron microscope-energy dispersive spectrometer (SEM-EDS), N 2 physisorption, X-ray difrraction (XRD), ultraviolet visible
-
Simplified estimation of anisotropic non-homogeneous extinction coefficients in porous solids considering spherical and cylindrical pore networks Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Manuel A. Ramirez-Cabrera, Patricio J. Valades-Pelayo
This manuscript presents a simplified analysis for estimating anisotropic, non-homogeneous extinction coefficients in porous solids as a function of the pore morphology and size distribution. The model contains two main simplifications: (1) the pore network consists of hollow interspersed spheres and cylinders, and (2) each surface exchanges radiation (through diffuse emission) only with itself and
-
Hydrogen production via surrogate biomass gasification using 5% Ni and low loading of lanthanum co-impregnated on fluidizable γ-alumina catalysts Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2022-01-01 Adriana Sánchez Enríquez, Daniel G. González Castañeda, Alan R. Calzada Hernández, Ivan Cruz Reyes, Benito Serrano Rosales
Nickel on alumina support offers opportunity for gasification of biomass for hydrogen production. In a recent contribution from our research team, (González Castañeda, D. G., et al. 2019) showed that cerium or lanthanum co-impregnation at 2 wt% with nickel may have a favorable effect for biomass catalytic gasification. However, and given an observed influence of lanthanum on the formation of small
-
Synthesis and characterization of fat-liquor from waste tallow Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-29 Preethi D. Angeline,Rames C. Panda,Ramanujam Saravanathamizhan
Abstract The fat-liquoring is an important step in leather making before dying to improve the glossiness, appearance, physical and chemical qualities of the leather. Synthetic sulphonated or sulphited oils are generally used to fill fibrous leather & to give it soft, elastic and loose characteristics. Natural fat-liquors (vegetable and animal-based) and synthetic fat-liquors are the two types of emulsions
-
Modelling and performance analysis for cumene production process in a four-layer packed bed reactor Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-29 Vinila Mundakkal Lakshmanan,Aparna Kallingal,Sreepriya Sreekumar
Abstract A mathematical model is developed and designed for the cumene reactor in cumene production process in Hindustan Organic Chemicals Limited (HOCL), Kochi with improved operating conditions. High purity cumene is produced by the alkylation of benzene with propylene in this catalytic condensation process where solid phosphoric acid (SPA) is used as the catalyst. The mathematical model has been
-
Electrocatalytic performance of sonochemically synthesized Pt–Ni/C nanoparticles in fuel cell application Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-29 Rajesh Kumar Polagani,Prashant L. Suryawanshi,Shirish H. Sonawane,Mahendra Chinthala
Abstract Developing high-performance electrocatalysts using simple and controllable methods is of interest to reduce the cost of polymer electrolyte membrane fuel cells. In this study, platinum is alloyed with nickel and supported on carbon (Pt–Ni/C) via an ultrasound-assisted route. The crystallite and particle sizes of the obtained nanoparticles were smaller than the commercial carbon-supported Pt
-
The effect of operating parameters of hydrodynamic cavitation – assisted alkaline catalyzed transesterification of sunflower oil with methanol on the degree of triglyceride conversion Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-28 Borivoj K. Adnađević,Ivan R. Nikolić,Svetozar A. Milenković,Jelena D. Jovanović
Abstract The effect of operating parameters such as reaction mixture inlet pressure p 1 (101.3–1013.2 kPa), methanol to oil molar ratio M 1 (3–12), the concentration of catalyst C c (0.0–1.0 wt%), temperature T (25–50 °C) and the number of passes of the reaction mixture through the venturi type hydrodynamic cavitation reactor n (1–12) on alkali-catalyzed transesterification of sunflower oil with methanol
-
Investigating the properties and performance of 3A molecular sieves as an adsorbent to prevent coke formation in olefin dehydration process Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-20 Zoya Moslempour,Sepehr Sadighi,Ali Dashti,Ali Ahmadpour
Abstract To study the affinity of 3A aluminosilicate adsorbents to prevent oligomerization of olefin molecules and forming green oil, physical and chemical properties of 3A molecular sieves are measured by using characterization techniques such as temperature-programmed desorption (TPD), nitrogen (N2) and water adsorptions, X-ray diffraction (XRD), X-ray fluorescence (XRF), crushing strength, and carbon
-
Characteristics of carbide slag slurry flow in a bubble column carbonation reactor Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-17 Peng Zheng,Genfu Zhou,Weiling Li,Chuanwen Zhao,Pu Huang,Junye Hua,Jian Sun,Yafei Guo
Abstract The direct aqueous mineral carbonation of carbide slag was investigated. The flow characteristics of carbide slag-CO2-water reaction system in a bubble column were studied, which included the bubble Sauter mean diameter, gas holdup, bubble residence time, and the gas-liquid interfacial area. Bubble flow behaviors in the reactor were characterized by analyzing the bed pressure signals. The
-
Simple microwave pyrolysis kinetics of lignocellulosic biomass (oil palm shell) with activated carbon and palm oil fuel ash catalysts Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-10 Saysunee Jumrat,Teerasak Punvichai,Wichuta Sae-jie,Seppo Karrila,Yutthapong Pianroj
Abstract The important parameters characterizing microwave pyrolysis kinetics, namely the activation energy (E a) and the rate constant pre-exponential factor (A), were investigated for oil palm shell mixed with activated carbon and palm oil fuel ash as microwave absorbers, using simple lab-scale equipment. These parameters were estimated for the Kissinger model. The estimates for E a ranged within
-
Synthesis of NPK fertilizer from low-grade phosphate raw material Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-07 Anar Kareeva,Uilesbek Besterekov,Perizat Abdurazova,Ulzhalgas Nazarbek,Irina Pochitalkina,Yerkebulan Raiymbekov
Abstract The article presents the results of studies of the process of obtaining NPK fertilizer from low-grade phosphate raw materials with P2O5 of about 18%. Phosphate raw materials were leached with a mixture of nitric-phosphoric acids with the addition of potassium carbonate, which serves as a source of potassium in the final product. The main parameters determined were the content of the main nutrients
-
Comparative study on photooxidation of methyl orange using various UV/oxidant systems Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-06 Soraya Boukhedoua,Razika Zouaghi,Oualida Nour El Houda Kaabeche
Abstract In the present work, a comparative study of the photooxidation of an aqueous solution of Methyl Orange (MeO) has been realized using H2O2 and IO3 −, BrO3 −, ClO3 −, ClO4 −, BO3 − ions in the presence of UV low pressure mercury lamp (UV-C light at λ max = 254 nm). The initial concentration of MeO in all experiments was 6 × 10−5 mol L−1. The degradation rate of MeO follows pseudo-first-order
-
Computational analysis of the particle size effect on the pressure profiles and type of flow regimes of TiO2 microparticles in a fluidized bed Int. J. Chem. React. Eng. (IF 1.6) Pub Date : 2021-12-02 Alireza Bahramian
Abstract The effect of particle size on the pressure profiles and flow regimes of the bed containing TiO2 microparticles (MPs) was investigated in a fluidized bed. The fluidization behavior of particles with mean diameters, d p , of 170, 200, 225, and 300 μm at different gas velocities, U g , was investigated both experimental and computational viewpoints. A computational fluid dynamic (CFD) model