文献类型：期刊文献

英文题名：Tuning the Integration Proximity between Na Promoter and FeMnOx Coupled with Rationally Modified HZSM-5 to Promote Selective CO2 Hydrogenation to Aromatics

作者：Song, Guiyao[1];Li, Minzhe[1];Xu, Lin[1];Yang, Xiaopei[1];Nawaz, Muhammad Asif[1];Yuan, Huimin[2];Zhang, Zhixiang[2];Xu, Xianming[2];Liu, Dianhua[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]China Natl Petr Corp, Daqing Petrochem Res Ctr, Daqing 163714, Peoples R China

年份：2022

卷号：61

期号：20

起止页码：6820

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20222212169929);WOS:【SCI-EXPANDED(收录号:WOS:000805390500004)】；

基金：This work was supported by the National Key R&D Program of China (2017YFB0602204) .

语种：英文

外文关键词：Magnetite - Aromatization - Sodium - Electronic properties - Carbides - Carbon dioxide - Catalyst selectivity - Hydrogenation - Olefins

摘要：Selective CO2 hydrogenation to aromatics has received widespread reputation, whereas high CO2 inertness and complex structure within aromatics inevitably depress the catalytic performance. Herein, we fabricated a bifunctional catalyst comprising active sodium-promoted FeMnOx and HZSM-5 for CO2 hydrogenation to aromatics with 64.24% selectivity at a single pass conversion of 44.49%. The appropriate proximity between Na and FeMnOx can endow CO2 hydrogenation with optimized performance, due to its regulation of both the electronic properties of iron species and the distribution of Fe3O4 and Fe5C2 on catalyst. Additionally, aromatics and BTX selectivity can be remarkably improved to 71.52% and 63.51% respectively on phosphorus modified HZSM-5, owing to the improved mesoporosity and partially passivated Bronsted acid sites. Significantly, we demonstrated a plausible mechanism during Fischer-Tropsch Synthesis that the increased iron carbide promotes lower olefins production, simultaneously, the generated lower olefins in turn contribute to the formation of iron carbide.