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题名: TPSR-MS study of adsorbed methanol over SAPO-34 and SAPO-44 molecular sieves
作者: Du, AP;  Xu, L;  Zhang, DH;  Liu, ZM;  Wang, GW
关键词: SAPO molecular sieve ;  methanol ;  adsorption ;  light olefin ;  temperature programmed surface reaction
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2004-08-01
卷: 25, 期:8, 页:619-623
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: Temperature-programmed surface reaction-mass spectrometry (TPSR-MS) and temperature-programmed desorption (TPD) techniques were used to study the relationship between the catalytic activity of SAPO-34 and SAPO-44 molecular sieves for methanol to olefin (MTO) reaction and their acidity. The result showed that there were two kinds of active sites on SAPO-34 and SAPO-44 molecular sieves, which were corresponding to the acidic sites with different strength on the molecular sieves. The adsorbed methanol underwent different reactions on different acidic sites. Methanol converted to dimethyl ether on the weak acidic sites, and light olefins were formed mainly from the adsorbed dimethyl ether on the strong acidic sites. The effect of the acid site strength on the light olefin formation temperature was also elucidated.
关键词[WOS]: CONVERSION ;  HYDROCARBONS ;  MECHANISM
语种: 英语
WOS记录号: WOS:000223853700007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139585
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 Sch, Beijing 100039, Peoples R China

Recommended Citation:
Du, AP,Xu, L,Zhang, DH,et al. TPSR-MS study of adsorbed methanol over SAPO-34 and SAPO-44 molecular sieves[J]. CHINESE JOURNAL OF CATALYSIS,2004,25(8):619-623.
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