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Chinese Journal of chemical Engineering 2018年第9期26卷 1879-1895页

作者： Ali Darvishi Ali Bakhtyari Mohammad Reza Rahimpour Department of chemical Engineering Shiraz University

Owing to the importance of process intensification in the natural gas associated processes, the present contribution aims to investigate the production of an important natural gas downstream product in an improved ***, a membrane-assisted reactor for the oxidative dehydrogenation of ethane is presented. The presented system includes a membrane for axial oxygen dosing into the reaction side. Such a strategy would lead to optimum oxygen distribution along the reactor length and prevention of hot spot formation as well. A feasibility study is conducted by developing a validated mathematical model composed of mass and energy balance equations. The effects of various operating variables are investigated by a rigorous sensitivity ***, by applying the genetic algorithm, a multi-objective optimization procedure is implemented to obtain the optimum operating condition. Considerable increase in the ethane conversion and ethylene yield are the advancements of membrane-assisted oxidative dehydrogenation reactor working under the optimum *** than 30% increase in the ethane conversion is obtained. Furthermore, the ethylene yield is enhanced up to 0.45.

关键词： Olefin ODH process Genetic algorithm Fixed-bed Mathematical modeling chemical reactors

Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

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中国化学工程学报:英文版 2023年第8期60卷 293-303页

作者： Lijuan Zhao Zhe Tan Xiaoguang Zhang Qijun Zhang Wei Wang Qiang Deng Jie Ma De'an Pan Institute of Circular Economy Beijing University of TechnologyBeijing 100124China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China China Ecological Civilization Research and Promotion Association Beijing 100035China

In the reaction process of carbonate desulfurization lead paste,the produced PbCO_(3) is easily wrapped in the outer periphery of PbSO_(4) to form a product layer,hindering the mass transfer ***,it is necessary to break the PbCO_(3) product *** this work,the rotor stator-reinforced reactor was selected as the enhanced desulfurization reactor for the purpose of breaking the PbCO_(3) product layer and promoting mass *** breakage process of the PbCO_(3) product layer generated during the PbSO_(4) desulfurization was *** fluid dynamics simulation to the rotation conditions was carried out to theoretically analyze the fluid flow characteristics of PbSO_(4) slurry and the wall shear stress affecting the breakage of PbCO_(3) product *** optimizing the rotation conditions,the distribution ratio of effective rotor wall shear stress range achieved 96.1%,and the stator wall shear stress range reached 99.15%under a rotation of 2000 r·min^(-1).The research work provides a reference for analysis of the mechanism of product layer breakage in the PbSO_(4) desulfurization process,and gives a clear and intuitive systematic study on the fluid flow characteristics and wall shear stress of the desulfurization reactor.

关键词： chemical reactors Computational fluid dynamics CFD Simulation Desulfurization Core-shell structure

Preparation of Fe-Mn/K/Al2O3 Fischer-Tropsch Catalyst and Its Catalytic Kinetics for the Hydrogenation of Carbon Monoxide

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Chinese Journal of chemical Engineering 2013年第5期21卷 507-519页

作者： F.Fazlollahi M.Sarkari H.Gharebaghi H.Atashi M.M.Zarei A.A.Mirzaei W.C.Hecker chemical Engineering Department Brigham Young University Provo UT 84602 USA South Pars Gas Complex Asaluyeh Bushehr Iran Department of chemical Engineering Faculty of Engineering University of Sistan & B aluchestan P.O. Box 98164-161 Zahedan Iran Department of Chemistry Faculty of Science University of Sistan & B aluchestan P.O. Box 98135-674 Zahedan Iran

A K promoted iron-manganese catalyst was prepared by sol-gel method,and subsequently was tested for hydrogenation of carbon monoxide to light *** kinetic experiments on a well-characterized Fe-Mn/K/Al2O3 catalyst were performed in a fixed-bed micro-reactor in a temperature range of 280-380 ℃,pressure range of 0.1-1.2 MPa,H2/CO feed molar ratio range of 1-2.1 and a space velocity range of 2000-7200 *** the mechanism of the process and Langmuir-Hinshelwood-Hogan-Watson（LHHW） approach,unassisted CO dissociation and H-assisted CO dissociation mechanisms were *** best models were obtained using non-linear regression analysis and Levenberg-Marquardt ***,4 models were considered as the preferred models based on the carbide ***,a model was proposed as a best model that assumed the following kinetically relevant steps in the iron-Fischer-Tropsch（FT） synthesis：（1） CO dissociation occurred without hydrogen interaction and was not a rate-limiting step;（2） the first hydrogen addition to surface carbon was the rate-determining *** activation energy and adsorption enthalpy were calculated 40.0 and -30.2 ***-1,respectively.

关键词： Fischer-Tropsch synthesis catalysis kinetics chemical reactors Levenberg-Marquardt(LM) method Langmuir-Hinshelwood-Hogan-Watson(LHHW) kinetics

CHOOSING STRUCTURE-DEPENDENT DRAG COEFFICIENT IN MODELING GAS-SOLID TWO-PHASE FLOW

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China Particuology 2003年第1期1卷 38-41页

作者： NingYang WeiWang WeiGe JinghaiLi Authortowhomcorrespondenceshouldbeaddressed. InstituteofProcessEngineering ChineseAcademyofSciences.Beiiino100080.P.R.China

IntroductionGas-solid two-phase flow is often encountered in chemical reactors for the process industry. For industrial users, design, scale-up, control and optimization for these reactors require a good understanding of the hydrodynamics of gas-solid two-phase flow. For researchers, exploration and prediction of the complex phenomena call for a good comprehension of the heterogeneous structure and of the dominant mechanisms of gas-solid and solid-solid interactions.

关键词： chemical reactors

High-yield production of 2,5-dimethylfuran from 5-hydroxymethylfurfural over carbon supported Ni–Co bimetallic catalyst

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Journal of Energy Chemistry 2016年第6期25卷 1015-1020页

作者： Panpan Yang Qineng Xia Xiaohui Liu Yanqin Wang Key Lab for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology

The catalytic conversion of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) has attracted extensive research interests because DMF can be used as potential and competitive renewable transportation fuel or additives. Here we report a non-noble bimetallic catalyst with improved activity for hydrogenation and hydrogenolysis by introducing active carbon as support into a nickel–cobalt catalyst. The characterizations of the catalyst indicate that the Ni and Co species are uniformly dispersed on the active carbon through the wetness impregnation method. The influences of reaction temperature and hydrogen pressure are systematically investigated and an excellent yield (up to 95%) of DMF can be obtained at relatively mild conditions, 130 °C and 1 MPa H2, over the carbon supported Ni–Co bimetallic catalyst. The high catalytic activity originates from the synergistic effect between Ni and CoOxspecies, the high BET surface area of the catalyst, and the uniform dispersion of Ni and Co species on the active carbon. The catalyst could be reused for 5 times without loss of activity in a batch reactor. Futhermore, the conversion of HMF to DMF on a fixed-bed reactor was also investigated and the 2%Ni–20%Co/C catalyst exhibited an excellent yield to DMF (>90%) for 71 h time on stream, indicating the high activity and stability of the catalyst. © 2016 Science Press

关键词： Batch reactors Biomass Catalysts chemical reactors Cobalt compounds Fuel additives Hydrogenolysis Hydrolysis Nickel

Robust Nonlinear Control of Continuous Stirred Tank reactors

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Advances in Manufacturing 1998年第2期2卷 51-54页

作者： Xiang Zhengrong Hu Weili (Nanjing University of Science and Technology)

This paper deals with the temperature tracking control problem of continuous stirred tank reactors (CSTRs) widely used in chemical engineering. Design of robust tracking controller for a class of CSTRs plant with uncertainties is presented using input output feedback linearization techniques. The control scheme has been applied to a first order irreversible exothermic reaction process carried out in a CSTR, and simulation results show that it is effective.

关键词： chemical reactors temperature tracking nonlinear control robust control feedback linearization uncertainties

Elements of chemical reaction engineering 3rd ed

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Elements of chemical reaction engineering