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题名: Effects of Support Acidity on the Catalytic Performance of Mo/HZSM-5-Al2O3 Catalysts in Olefin Metathesis
作者: Zhang Dazhou1, 2;  Li Xiujie1;  Liu Shenglin1;  Zhu Xiangxue1;  Xin Wenjie1;  Xe Sujuan1;  Zeng Peng3;  Xu Longya1
关键词: ethene ;  butene ;  metathesis reaction ;  propene ;  support acidity ;  HZSM-5 zeolite ;  alumina
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2011-11-01
DOI: 10.3724/SP.J.1088.2011.10744
卷: 32, 期:11, 页:1747-1754
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Mo/HZSM-5-Al2O3 catalyst samples, where the HZSM-5 had different Si/Al ratios (12, 42, and 213), were prepared and evaluated in a fixed-bed reactor. Effects of support acidity changes on the catalytic performance of Mo/HZSM-5-Al2O3 in the metathesis of ethene and 2-butene to propene were investigated. NH3 temperature-programmed desorption and pyridine infrared spectra revealed that the differences in support acidity led to the different anchoring modes of Mo species on the composite supports. Quick deactivation phenomena were observed on Mo/HZSM-5-Al2O3 (Si/Al = 12) due to the high acidity density of the catalyst. For Mo/HZSM-5-Al2O3 (Si/Al = 213), more Mo species dispersed on the alumina in octahedral form and those locating in the zeolite channels existed in the state of (Mo2O5)(2+) clusters evidenced by ultraviolet-visible diffuse reflectance spectroscopy and H-2 temperature-programmed reduction results. Such distribution was linked with the low metathesis activity and the appearance of the induction period on Mo/HZSM-5-Al2O3 (Si/Al = 213). Mo/HZSM-5-Al2O3 (Si/Al = 42) sample demonstrated the best catalytic activity and reaction stability among the three samples. This was attributed to its suitable acidity amount and optimal distribution of Mo species on the support.
关键词[WOS]: METHANE DEHYDRO-AROMATIZATION ;  SOLID-STATE NMR ;  OXIDATIVE DEHYDROGENATION ;  MOLYBDENA-ALUMINA ;  SURFACE-ACIDITY ;  OXIDE CATALYSTS ;  SILICA-ALUMINA ;  LEWIS ACIDITY ;  MO ;  PYRIDINE
语种: 英语
WOS记录号: WOS:000297481300012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142720
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, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.China Huanqiu Contracting & Engn Corp, Fushun 113006, Liaoning, Peoples R China

Recommended Citation:
Zhang Dazhou,Li Xiujie,Liu Shenglin,et al. Effects of Support Acidity on the Catalytic Performance of Mo/HZSM-5-Al2O3 Catalysts in Olefin Metathesis[J]. CHINESE JOURNAL OF CATALYSIS,2011,32(11):1747-1754.
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