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题名: Role of Manganese Oxide in Syngas Conversion to Light Olefins
作者: Zhu, Yifeng1;  Pan, Xiulian1;  Jiao, Feng1, 2;  Li, Jian1, 2;  Yang, Junhao1, 2;  Ding, Minzheng1;  Han, Yong3, 4;  Liu, Zhi3, 4;  Bao, Xinhe1
关键词: syngas chemistry ;  light olefins ;  manganese oxides ;  CO dissociation ;  bifunctional catalysts ;  heterogeneous catalysis ;  oxide-zeolite
刊名: ACS CATALYSIS
发表日期: 2017-04-01
DOI: 10.1021/acscatal.7b00221
卷: 7, 期:4, 页:2800-2804
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The key of syngas (a mixture of CO and H-2) chemistry lies in controlled dissociative activation of CO and C-C coupling. We demonstrate here that a bifunctional catalyst of partially reducible manganese oxide in combination with SAPO-34 catalyzes the selective formation of light olefins, which validates the generality of the OX-ZEO (oxide-zeolite) concept for syngas conversion. Results from in situ ambient pressure X-ray photoelectron spectroscopy, infrared spectroscopy, and temperature-programmed surface reactions reveal the critical role of oxygen vacancies on the oxide surface, where CO dissociates and is converted into surface carbonate and carbon species. They are converted to CO2 and CHx in the presence of H-2. The limited C-C coupling and hydrogenation activities of MnO enable the reaction selectivity to be controlled by the confined pores of SAPO-34. Thus, a selectivity of light olefins up to 80% is achieved, far beyond the limitation of Anderson-Shultz-Flory distribution. These findings open up possibilities to explore other active metal oxides for more efficient syngas conversion.
关键词[WOS]: WATER-GAS SHIFT ;  FISCHER-TROPSCH SYNTHESIS ;  SELECTIVE CONVERSION ;  ELECTRONIC-STRUCTURE ;  DEPTH-PROFILE ;  CATALYSTS ;  RANGE ;  OXIDATION ;  CERIA ;  XPS
语种: 英语
WOS记录号: WOS:000398986700067
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150338
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China
4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China

Recommended Citation:
Zhu, Yifeng,Pan, Xiulian,Jiao, Feng,et al. Role of Manganese Oxide in Syngas Conversion to Light Olefins[J]. ACS CATALYSIS,2017,7(4):2800-2804.
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