文献类型：期刊文献

英文题名：Study of the Fischer-Tropsch synthesis on nano-precipitated iron-based catalysts with different particle sizes

作者：Han, Zhonghao[1];Qian, Weixin[1];Ma, Hongfang[1];Wu, Xian[1];Zhang, Haitao[1];Sun, Qiwen[2];Ying, Weiyong[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, State Key Lab Chem Engn, Minist Educ,Sch Chem Engn, Shanghai 200237, Peoples R China;[2]State Key Lab Coal Liquefact & Coal Chem Technol, Shanghai 201203, Peoples R China

年份：2020

卷号：10

期号：70

起止页码：42903

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20205109665662);WOS:【SCI-EXPANDED(收录号:WOS:000596717400028)】；

基金：We gratefully acknowledge financial supports from the National High Technology Research and Development Plan of China (863 Plan, 2011AA05A204) and the Fundamental Research Funds for the Central Universities (No: 50321012017013).

语种：英文

外文关键词：Fischer-Tropsch synthesis - Manganese compounds - Iron - Iron compounds - Hydrogenation - Nanocatalysts - Adsorption

摘要：Nano iron-based catalysts with different particle sizes were prepared by a co-precipitated method and characterized by XRD, N-2 adsorption, SEM, Mossbauer spectroscopy, XPS, H-2-TPR, CO-TPD, H-2-TPD and TGA. The CO-TPD results revealed that large particle sizes of catalysts were not conducive to the adsorption of CO, and exhibited low activity of FTS. The decrease of catalyst particle size enhanced the interaction between Fe and Mn, and promoted the CO chemical adsorption and the formation of Fe5C2, but the hydrogenation reaction was inhibited as confirmed by H-2-TPD. When the particle size continued to decrease, Mossbauer spectroscopy showed that MnFe2O4 appeared in the catalyst phase, which hindered the reduction of catalysts and the adsorption of feed gas. Overall, the sample FeMnSm-600 showed the highest C = 2-4 selectivity of 33% at the highest CO conversion of 79% during the reaction conditions of 300 degrees C, 1.0 MPa, 12 000 mL (g h)(-1), and H-2/CO = 2.