Effect of operating conditions and potassium content on Fischer-Tropsch liquid products produced by potassium-promoted iron catalysts

作     者：Francisco E.M.Farias Fernando G.Sales Fabiano A.N.Fernandes 

作者机构：Universidade Federal do CearáDepartamento de Engenharia QuímicaCampus do PiciBloco 70960455-760 Fortaleza-CEBrazil 

出 版 物：《Journal of Natural Gas Chemistry》 (天然气化学杂志（英文版）)

年 卷 期：2008年第17卷第2期

页      面：175-178页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：Coordenação de Aperfeiçoamento de Pessoal de Nível Superior,CAPES Conselho Nacional de Desenvolvimento Científico e Tecnológico,CNPq 

主　　题：Fischer-Tropsch synthesis liquid fuels iron-based catalyst potassium 

摘      要：The dependencies of Fischer-Tropsch synthesis liquid hydrocarbon product distribution on operating pressure and temperature have been studied over three potassium-promoted iron catalysts with increasing potassium molar content. The study followed an experimental planning and the results were analyzed based on surface response methodology. The effects of different operating conditions and potassium contents on the liquid product distribution were compared based on number average carbon number and dispersion. Results showed that high pressures （25 to 30 arm） favored the production of waxes that could be converted into liquid fuels through hydrocracking, while greater direct selectivity towards diesel was favored by low pressure （20 arm） using catalysts with low potassium to iron molar ratios. The liquid product distribution produced using an iron catalyst with high potassium content presented higher number-average number of carbons when compared to the distribution obtained using an iron catalyst with low potassium content.