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

作     者：F.Fazlollahi M.Sarkari H.Gharebaghi H.Atashi M.M.Zarei A.A.Mirzaei W.C.Hecker 

作者机构：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 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2013年第21卷第5期

页      面：507-519页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：University of Sistanand Baluchestan for their kindness and support in this research 

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

摘      要：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.