Redispersion and Stabilization of Cu/MFI Catalysts by the Encapsulation Method for Ethanol Dehydrogenation

被引:10
|
作者
Pang, Jifeng [1 ,2 ]
Yin, Ming [1 ,2 ]
Wu, Pengfei [1 ]
Song, Lei [1 ]
Li, Xianquan [1 ,2 ]
Zhang, Tao [1 ]
Zheng, Mingyuan [1 ,3 ]
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, CAS Key Lab Sci & Technol Appl Catalysis, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
基金
美国国家科学基金会;
关键词
copper catalyst; encapsulation; ethanol dehydrogenation; acetaldehyde; stability; CU/SIO2; CATALYSTS; DIMETHYL OXALATE; RECENT PROGRESS; ZEOLITE; HYDROGENATION; PERFORMANCE; MFI; TRANSFORMATION; NANOPARTICLES; CONVERSION;
D O I
10.1021/acssuschemeng.2c06058
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Encapsulation of metal particles with ordered porous zeolite is a promising method to stabilize nanoparticles. In this work, Cu/MFI catalysts prepared by the impregnation method were encapsulated with MFI to yield (Cu/MFI)@MFI catalysts for ethanol dehydrogenation. The encapsulation process not only anchored Cu particles into MFI but also redispersed Cu with decreased particle sizes and newly formed Cu+ species. During the ethanol dehydrogenation reaction, the Cu+ and Cu0 species confined in (Cu/MFI)@MFI catalysts demonstrated synergistic effects and afforded 95.7% acetaldehyde selectivity, 97.2% ethanol conversion at 523 K, and a weight hourly space velocity (WHSV) of 0.53 h-1 in the 200 h time on stream over the optimized (Cu/MFI)@MFI 100% catalyst, which is significantly better than the counterpart of the Cu/MFI catalyst.
引用
收藏
页码:3297 / 3305
页数:9
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