文献类型：期刊文献

英文题名：Effect of Zr Incorporation on Mordenite Catalyzed Dimethyl Ether Carbonylation

作者：Zhao, Peng[1];Qian, Weixin[1];Ma, Hongfang[1];Sheng, Haibing[1];Zhang, Haitao[1];Ying, Weiyong[1]

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

年份：2021

卷号：151

期号：4

起止页码：940

外文期刊名：CATALYSIS LETTERS

收录：;EI(收录号：20203409088356);WOS:【SCI-EXPANDED(收录号:WOS:000560975700002)】；

基金：This work is financially supported by the Fundemental Research Funds for the Central Universities (No. 50321012017013).

语种：英文

外文关键词：Zr-mordenite; Post-treatment; Dimethyl ether carbonylation; Methyl acetate

摘要：Zr-mordenite catalysts were prepared by post-treatment method and H-mordenite catalyst was synthesized by hydrothermal method for the dimethyl ether carbonylation reaction. XRD, N(2)adsorption/desorption, ICP-OES, SEM, TEM, UV-Vis, XPS, Raman, CO-TPD, NH3-TPD,Al-27 MAS NMR, FTIR and Py-IR were employed to characterize the catalysts. The results demonstrated that part of Zr atoms existed in a tetrahedral coordination state after incorporating into the mordenite framework. Zirconium Lewis acid sites with the ability to absorb CO molecules were formed during this process although the amount of Bronsted acid sites in 8-member ring channels decreased upon the incorporation of zirconium. During the concentration of zirconium nitrate solution increased from 0.02 to 0.08 mol/L, the Zr-mordenite catalyst through post-treatment with 0.04 mol/L zirconium nitrate solution exhibited the best catalytic performance at 473 K and 1 MPa. Dimethyl ether conversion and methyl acetate selectivity increased to 78% and 96% respectively compared with H-mordenite catalyst. [GRAPHICS] .