Effect of cofeeding n-butane with methanol on aromatization performance and coke formation over a Zn loaded ZSM-5/ZSM-11 zeolite

	Effect of cofeeding n-butane with methanol on aromatization performance and coke formation over a Zn loaded ZSM-5/ZSM-11 zeolite
	Song, Chao 1,2; Liu, Kefeng 1,2; Zhang, Dazhou 1,2; Liu, Shenglin 1; Li, Xiujie 1; Xie, Sujuan 1; Xu, Longya 1
刊名	applied catalysis a-general
	2014-01-30
卷号	470 页码:15-23
关键词	Methanol n-Butane Aromatization Cofeeding Coke
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.
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000330822900003
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/143197]
专题	大连化学物理研究所_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
推荐引用方式 GB/T 7714	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.