文献类型：期刊文献

英文题名：Regulating iron species compositions by Fe-Al interaction in CO2 hydrogenation

作者：Xu, Minjie[1];Liu, Xianglin[1];Song, Guiyao[1];Cai, Yingying[1];Shi, Bianfang[1];Liu, Yitao[1];Ding, Xiaoxu[1];Yang, Zixu[1];Tian, Pengfei[2];Cao, Chenxi[3];Xu, Jing[1,4]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, Shanghai 200237, Peoples R China;[4]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China

年份：2022

卷号：413

起止页码：331

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20222812334640);WOS:【SCI-EXPANDED(收录号:WOS:000829348000002)】；

基金：National Science Foundation (21878080 and 21808058) , and the Dean/Opening Project of Guangxi Key Laboratory of Petro-chemical Resource Processing and Process Intensification Technology are greatly acknowledged for funding this work. C.C. thanks the start-up grant of East China University of Science and Technology (SLH00212012) .

语种：英文

外文关键词：CO2 hydrogenation; Fe -Al interaction; Iron oxide; Iron carbide

摘要：Different iron species exhibit distinct activity and selectivity in CO2 hydrogenation reaction. Herein, by controlling calcination temperature, Fe-Al interaction in Na promoted Fe-Al catalysts has been regulated, which further leads to various compositions of iron oxide (FeOx) and iron carbides (Fe7C3 and Fe5C2) after CO activation and CO2 hydrogenation reaction. The phase compositions and structures of Fe-Al catalysts are carefully distinguished by multiple characterizations, including XRD, XPS, MES and TEM, and the reactivity of different phases is studied with the combination of experiments (kinetics, TP and in situ DRIFTS) and Density Functional Theory (DFT) calculations. Our FeAl350 with the highest FeCx content shows the highest CO2 conversion of 48.2% and the lowest CO selectivity of 10.1%, and FeAl900 with the highest Fe5C2/FeCx ratio presents the highest C5+ selectivity of 44.6%. Finally, a correlation between different compositions of iron species with the activity and selectivity of Fe-based for CO2 hydrogenation to olefins was established. (c) 2022 Elsevier Inc. All rights reserved.