文献类型：期刊文献

英文题名：Rationally designing NaFeMn/core-shell HZSM-5@Si bifunctional catalyst for selective synthesis of para-Xylene from CO2 hydrogenation

作者：Song, Guiyao[1];Jiang, Qisheng[1];Zhai, Yangzhou[1];Liu, Dianhua[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Sch Chem Engn, State Key Lab Chem Engn,Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：280

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20232614324540);WOS:【SCI-EXPANDED(收录号:WOS:001024918600001)】；

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：CO 2 hydrogenation; NaFeMn; Organosilicon; HZ@Si-vap zeolite; P-xylene

摘要：Selective production of aromatics from CO2 hydrogenation has attracted wide attention, but still remains big challenges, especially tuning the selectivity towards value-added p-xylene. Here, an effective NaFeMn/HZSM-5 catalyst was synthesized for selective CO2 hydrogenation to aromatics, over which a high aromatics selectivity of 72 % was realized at 45 % CO2 conversion. It was observed that the co-existence of Na and Mn can generate a beneficial interaction, promoting catalyst reduction and CO2 adsorption. In addition, the selectivity towards benzene-toluene-xylene (BTX) was significantly enhanced from 30 % to 46 % in the presence of organosilicon, by which the structural and acidic properties of the zeolite were improved. Furthermore, when NaFeMn catalyst was combined with core-shell HZSM-5@Si-vap zeolite, synthesized by vapor-crystallization, selectivity of p-xylene in xylene was increased from 28 % to 50 %. Compared with traditional hydrothermal treatment, vapor crystallization endows intact silicalite encapsulation and surface acidity passivation.