文献类型：期刊文献

英文题名：Syngas to olefins with low CO2 formation by tuning the structure of FeCx-MgO-Al2O3 catalysts

作者：Liu, Yitao[1];Xu, Minjie[1];Yang, Zixu[1];Ding, Xiaoxu[1];Zhu, Minghui[1];Han, Yi-Fan[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Zhengzhou Univ, Engn Res Ctr Adv Funct Mat Mfg, Minist Educ, Zhengzhou 450001, Peoples R China

年份：2022

卷号：450

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20222912359342);WOS:【SCI-EXPANDED(收录号:WOS:000830811200005)】；

基金：The authors greatly acknowledge the funding support from National Science Foundation (21878080) , Shanghai Sailing Program (19YF1411000) , China Postdoctoral Science Foundation (2018M641034) , Fundamental Research Funds for the Central Univer- sities (222201814006) and Ningxia Science Foundation (2019AAC03282) .

语种：英文

外文关键词：LDHs; Syngas; Lowerolefins; STO; FeMgAlcatalyst

摘要：Selectivity to olefins and CO2 is a pivotal factor reflecting economic and environmental efficiency of the syngas to olefins process (STO). Herein we demonstrate the intrinsic nature of the catalyst supports in STO. FeMgAl cat-alysts with controlled Mg/Al ratio derived from layered double hydroxides (LDHs) were prepared by a co -precipitation method. A series of in/ex situ spectroscopy (FTIR, AP-XPS, TP, PE and MES) were applied to reveal Mg/Al ratio affecting the adsorption/reactivity of CO and H2, the proportion of iron carbides (FeCx) and iron oxides (FeOx) was relating to the selectivity to lower olefins and CO2. The MgAl oxide supported Fe catalysts can balance (i) carbon chain growth probability vs. O/P and (ii) primary/secondary CO2 formation paths, to suppress the selectivity of CO2 to 28.2% with a C2-C4 olefin selectivity of 56.2%.