文献类型：期刊文献

英文题名：Effects of Zr and K Promoters on Precipitated Iron-Based Catalysts for Fischer-Tropsch Synthesis

作者：Zhang, Haojian[1];Ma, Hongfang[1];Zhang, Haitao[1];Ying, Weiyong[1];Fang, Dingye[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Engn Res Ctr Large Scale Reactor Engn & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：142

期号：1

起止页码：131

外文期刊名：CATALYSIS LETTERS

收录：;EI(收录号：20120614751299);WOS:【SCI-EXPANDED(收录号:WOS:000299919700018)】；

基金：We gratefully acknowledge the financial support from State Key Laboratory of Chemical Engineering (SKL-ChE-09T01).

语种：英文

外文关键词：Fischer-Tropsch synthesis; Precipitated iron-based catalyst; Zr promoter; K promoter

摘要：The effects of Zr and K promoters on the structure, adsorption, reduction, carburization and catalytic behavior of precipitated iron-based Fischer-Tropsch synthesis (FTS) catalysts were investigated. The catalysts were characterized by N-2 physisorption, temperature-programmed reduction/desorption (TPR/TPD) and Mossbauer effect spectroscopy (MES) techniques. As revealed by N-2 physisorption, Zr and/or K promoted catalysts showed lower surface area than Fe/SiO2 catalyst. Zr promoter inhibited the reduction and carburization because of the interaction between Fe and Zr in Fe-Zr/SiO2 catalysts. K promoter enhanced the reduction in CO and apparently facilitated the CO adsorption, thus promoted the carburization, but it retarded the reduction in H-2 and severely suppressed the H-2 adsorption. Compared with the singly promoted catalysts, the doubly promoted catalyst had the highest FTS activity. In addition, both Zr and K promoters suppressed the formation of methane and shifted the production distribution to heavy hydrocarbons.