文献类型：期刊文献

英文题名：Role of Sio2 in Different Iron-Based Catalysts for Fischer-Tropsch Synthesis to Light Olefins

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

机构：[1] The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province, School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, China; [2] Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, School of chemical engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220369735)

语种：英文

外文关键词：Catalyst selectivity - Crystallinity - Fischer-Tropsch synthesis - Iron - Iron compounds - Olefins - Shells (structures) - Silicon oxides

摘要：Co-precipitated FeSi-cp catalysts, impregnated FeSi-im catalyst and core-shell Fe@Si catalysts synthetized through different method were characterized by N 2 adsorption, ICP, XRD, TEM, H 2 -TPR, CO-TPD, M?ssbauer spectroscopy and TG. The configuration between Fe and Si played an important role in the catalyst performance. Both FeSi-cp and FeSi-im showed high dispersion, but easily to be agglomerated in FTS. In contrast, Fe@Si has high crystallinity and strong CO chemisorption capacity, which is conducive to the formation of Fe 5 C 2 . The SiO 2 shell could isolate the active components, reduce carbon deposition and restrain the production of C 5 + . The results of FTS performance revealed that core-shell Fe@Si catalysts show higher C 2~4 = selectivity and better FTS stability in 120 h. ? 2022, The Authors. All rights reserved.