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题名: Temperature-Programmed Methanol Conversion and Coke Deposition on Fluidized-Bed Catalyst of SAPO-34
作者: Yuan Cuiyu1;  Wei Yingxu1;  Li Jinzhe1;  Xu Shutao1;  Chen Jingrun1;  Zhou You1;  Wang Quanyi1;  Xu Lei1;  Liu Zhongmin1
关键词: methanol conversion ;  coke deposition ;  temperature-programmed reaction ;  hydrocarbon pool mechanism ;  deactivation ;  adamantane hydrocarbon
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2012-02-01
DOI: 10.3724/SP.J.1088.2012.10838
卷: 33, 期:2, 页:367-374
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 methanol conversion was performed in a microscale fluidized-bed reactor and the deposited coke species formed during the reaction at different temperature ranges was analyzed. By combining effluent detection and measurements of confined coke species evolution with thermal analysis and GC/MS, a particular phenomenon that appeared in the methanol conversion was explained. Among the coke products, besides aromatic coke species, a new kind of coke compounds, multi-ringed alkalies, mainly composed of methyladamantane hydrocarbons were found in the low temperature range. The generation and accommodation of these adamantane hydrocarbons on the SAPO-34 catalyst suppressed the successive formation of hydrocarbon pool species, polymethylbenzenes, as the reaction center of methanol conversion, and caused the low activity of the SAPO-34 catalyst at low reaction temperature. In the temperature range of 300-350 degrees C, methylbenzenes and methyladamantanes were the main coke materials and they were transformed to methylnaphthalenes and polycyclic aromatics at higher temperature. The evolution of the confined coke compounds corresponded to the initial reactivity enhancement of the catalyst at 300-325 degrees C, the lowered activity at 325-350 degrees C, and recovered methanol conversion at 350-400 degrees C. Based on the coke analysis and catalytic performance tests, a new deactivation mechanism was proposed for the methanol conversion with the consideration of the abundant formation of adamantane hydrocarbons as the confined materials at low temperature.
关键词[WOS]: TO-OLEFIN CATALYSIS ;  HYDROCARBONS REACTION ;  REACTION-MECHANISM ;  SHAPE-SELECTIVITY ;  MTO REACTION ;  HSAPO-34 ;  DEACTIVATION ;  H-SAPO-34 ;  CAVITIES
语种: 英语
WOS记录号: WOS:000301090900023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143070
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 Natl Lab Clean Energy, Natl Engn Lab Methanol To Olefins, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Yuan Cuiyu,Wei Yingxu,Li Jinzhe,et al. Temperature-Programmed Methanol Conversion and Coke Deposition on Fluidized-Bed Catalyst of SAPO-34[J]. CHINESE JOURNAL OF CATALYSIS,2012,33(2):367-374.
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