Highly active Pd containing EMT zeolite catalyst for indirect oxidative carbonylation of methanol to dimethyl carbonate

• 来源期刊: 能源化学
• 年，卷（期）: 2021,（1）
• 页码范围: 191-201
• 页数: 11页
• 语种: 英文

摘要

Palladium containing EMT zeolite catalyst(Pd/EMT)was prepared and used for the indirect oxidative car-bonylation of methanol to dimethyl carbonate(DMC).The EMT zeolite was employed as a new catalyst support and compared with the conventional Pd containing FAU zeolite catalyst(Pd/FAU).The Pd/EMT in contrast to the Pd/FAU catalyst exhibited high intrinsic activity with the turnover frequency of 0.25 s-1 vs.0.11 s-1.The Pd/EMT catalyst showed high CO conversion of 82％and DMC selectivity of 79％,that main-tained for at least 130 h,while the activity of the Pd/FAU catalyst rapidly deteriorated within 12 h.The enhanced interactions between Pd and EMT zeolite inhibited the sintering of palladium clusters and maintained the Pd2+active sites in the Pd/EMT catalyst.The stabilization of the mono-dispersed Pd clus-ters within the EMT zeolite is paramount to the excellent performance of the catalyst for the indirect oxidative carbonylation of methanol to DMC.