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题名: Liquefied petroleum gas aromatization to high octane gasoline over ZSM-5 zeolite catalyst at low temperature
作者: Song, YQ;  Xu, LY;  Xie, SJ;  Wu, ZH;  Wang, QX
关键词: ZSM-5 zeolite ;  liquefied petroleum gas ;  aromatization ;  gasoline ;  hydrothermal treatment
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2004-03-01
卷: 25, 期:3, 页:199-204
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: The effects of reaction temperature, space velocity, pressure and hydrothermal treatment of the catalyst on the aromatization of liquefied petroleum gas (LPG) to high octane gasoline over ZSM-5 zeolite catalyst at low temperature were investigated. The catalyst exhibited high activity for aromatization when the reaction temperature was higher than 335 degreesC, and showed high ability for olefin oligomerization when the temperature was lower than 300 degreesC. Moreover, the selectivity for benzene, toluene and C10+ aromatics increased with the reaction temperature. With the increase of the space velocity from 2 to 20 h(-1), the selectivity for aromatics decreased from 62.1% to 12.3%. However, the selectivity for paraxylene increased even beyond the thermodynamic equilibrium, which is probably attributed to the shape selectivity caused by the quick coking in the channel of ZSM-5 zeolite. In addition, the presence of hydrogen in the reaction system is favorable for coking prohibition during the reaction and thus improved the catalyst stability. It was also found that the hydrothermal treatment of the ZSM-5 zeolite catalyst at a proper temperature changed the acidity distribution of the ZSM-5 catalyst and therefore the catalyst stability was enhanced.
关键词[WOS]: LIGHT-HYDROCARBONS
语种: 英语
WOS记录号: WOS:000220700100009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139287
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, Liaoning, Peoples R China

Recommended Citation:
Song, YQ,Xu, LY,Xie, SJ,et al. Liquefied petroleum gas aromatization to high octane gasoline over ZSM-5 zeolite catalyst at low temperature[J]. CHINESE JOURNAL OF CATALYSIS,2004,25(3):199-204.
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