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Effect of cofeeding n-butane with methanol on aromatization performance and coke formation over a Zn loaded ZSM-5/ZSM-11 zeolite
Song, Chao1,2; Liu, Kefeng1,2; Zhang, Dazhou1,2; Liu, Shenglin1; Li, Xiujie1; Xie, Sujuan1; Xu, Longya1
关键词Methanol N-butane Aromatization Cofeeding Coke
刊名APPLIED CATALYSIS A-GENERAL
2014-01-30
DOI10.1016/j.apcata.2013.10.036
470页:15-23
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
类目[WOS]Chemistry, Physical ; Environmental Sciences
研究领域[WOS]Chemistry ; Environmental Sciences & Ecology
关键词[WOS]AMORPHOUS-CARBON ; CATALYTIC ROLE ; HIGHER ALKANES ; LIGHT ALKANES ; PORE SYSTEMS ; HYDROCARBONS ; ZSM-5 ; DEACTIVATION ; CONVERSION ; TRANSFORMATION
英文摘要The aromatization performance of cofeeding n-butane with methanol was investigated in a fixed bed reactor over a Zn loaded ZSM-5/ZSM-11 zeolite. Coke deposited on the catalyst was characterized by TG, TPO, FTIR and Raman technique. During the 48 h life-test under the conditions of 510 degrees C, 0.4 MPa, WHSV (CH2) = 2 h(-1), pure n-butane reaction performance of the catalyst changes little, but high LPG and low aromatics yields are obtained. Only under the suitable n-butane/methanol ratio, the relatively good aromatics selectivity can be obtained and maintained during the reaction process. Compared with methanol aromatization, the integrated process exhibits a much slower rate of deactivation. Addition of methanol in n-butane inhibits the dry gas production while promotes the LPG production. Water generated from methanol dehydration may occupy the catalytic active sites for olefins aromatization over the catalyst and thus suppress the production of total aromatics. In fact, water mainly suppresses benzene formation and this inhibiting effect increases with n-butane content in the feed, in contrast to its promoting effect on formation of C-8 and C-9 aromatics. Increasing methanol content in the feed, a simultaneous increase in coke content of the spent catalyst and preference for coke deposition in micropore is observed. Furthermore, the fraction of aliphatics in coke decreases, while those of less-condensed aromatics and polyaromatics incease, which is associated with the increased deactivation of catalyst. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000330822900003
引用统计
被引频次:22[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/143197
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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Song, Chao,Liu, Kefeng,Zhang, Dazhou,et al. Effect of cofeeding n-butane with methanol on aromatization performance and coke formation over a Zn loaded ZSM-5/ZSM-11 zeolite[J]. APPLIED CATALYSIS A-GENERAL,2014,470:15-23.
APA Song, Chao.,Liu, Kefeng.,Zhang, Dazhou.,Liu, Shenglin.,Li, Xiujie.,...&Xu, Longya.(2014).Effect of cofeeding n-butane with methanol on aromatization performance and coke formation over a Zn loaded ZSM-5/ZSM-11 zeolite.APPLIED CATALYSIS A-GENERAL,470,15-23.
MLA Song, Chao,et al."Effect of cofeeding n-butane with methanol on aromatization performance and coke formation over a Zn loaded ZSM-5/ZSM-11 zeolite".APPLIED CATALYSIS A-GENERAL 470(2014):15-23.
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