Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment

	Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment
	Bai, J; Liu, SL; Xie, SJ; Xu, LY; Lin, LW
刊名	catalysis letters
	2003-10-01
卷号	90 期号:3-4 页码:123-130
关键词	CH4 dehydroaromatization Mo/MCM-22 coke formation shape selectivity specific surface area
产权排序	1;1
英文摘要	dehydroaromatization of ch4 with 2% co2 on 6mo/mcm-22 in a 100-h lifetime test was carried out at 993 k, atmospheric pressure and 1500 ml/gh. the duration of the lifetime test can be divided into an induction stage, stable stage and deactivation stage on the basis of the selectivities of hydrocarbons and coke. the characteristics of deposited coke with different time onstream were studied using tpo and tg techniques. there were two peaks corresponding to two kinds of coke recorded in tpo profiles, and the oxidation temperature of coke shifted to higher values with less hydrogen content with the increase of coke deposits. bet and benzene-tpd techniques were employed to study the variation of specific surface area of the external and micropore surface versus time onstream. with the accumulation of coke deposits, although the pores became partially blocked and the internal surface decreased, methane could still enter the channel and was converted to benzene with shape selectivity until a critical value of coke deposition was reached.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	mo-based catalysts ; dehydro-aromatization ; conversion ; benzene ; zeolite ; mo/hzsm-5 ; dehydrogenation ; activation ; oxygen
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000186636600003
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/83039]
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	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Bai, J,Liu, SL,Xie, SJ,et al. Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment[J]. catalysis letters,2003,90(3-4):123-130.
APA	Bai, J,Liu, SL,Xie, SJ,Xu, LY,&Lin, LW.(2003).Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment.catalysis letters,90(3-4),123-130.
MLA	Bai, J,et al."Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment".catalysis letters 90.3-4(2003):123-130.