Disentangling the activity-selectivity trade-off in catalytic conversion of syngas to light olefins

被引：149

作者：

Jiao, Feng ^{[1
,2
]}

Bai, Bing ^{[1
,2
]}

Li, Gen ^{[1
,2
]}

Pan, Xiulian ^{[1
,2
]}

Ye, Yihan ^{[1
,2
]}

Qu, Shengcheng ^{[1
]}

Xu, Changqi ^{[1
]}

Xiao, Jianping ^{[1
,2
]}

Jia, Zhenghao ^{[1
]}

Liu, Wei ^{[1
]}

Peng, Tao ^{[1
,3
]}

Ding, Yilun ^{[1
,2
]}

Liu, Cheng ^{[1
,2
]}

Li, Jinjing ^{[1
,2
]}

Bao, Xinhe ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, 2011 Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Catalysis, Dalian 116023, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Sci & Technol China, Hefei 230026, Peoples R China

来源：

SCIENCE | 2023年 / 380卷 / 6646期

基金：

中国国家自然科学基金;

关键词：

SYNTHESIS GAS; HYDROGENATION; DESIGN; SITES;

D O I：

10.1126/science.adg2491

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Breaking the trade-off between activity and selectivity has been a long-standing challenge in the field of catalysis. We demonstrate the importance of disentangling the target reaction from the secondary reactions for the case of direct syngas conversion to light olefins by incorporating germanium-substituted AlPO-1 8 within the framework of the metal oxide-zeolite (OXZEO) catalyst concept. The attenuated strength of the catalytically active Bronsted acid sites allows enhancing the targeted carbon-carbon coupling of ketene intermediates to form olefins by increasing the active site density while inhibiting secondary reactions that consume the olefins. Thus, a light-olefins selectivity of 83% among hydrocarbons and carbon monoxide conversion of 85% were obtained simultaneously, leading to an unprecedented light-olefins yield of 48% versus current reported light-olefins yields of <= 27%.

引用

页码：727 / 730

页数：4

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