Methane dehydroaromatization over Mo/HZSM-5 catalyst: Effect of dealumination of HZSM-5 zeolite

	Methane dehydroaromatization over Mo/HZSM-5 catalyst: Effect of dealumination of HZSM-5 zeolite
	Song Yibing ; Sun Changyong ; Wu Yanqing ; Shen Wenjie ; Lin Liwu
刊名	chinese journal of catalysis
	2007-04-01
卷号	28 期号:4 页码:371-376
关键词	methane aromatization molybdenum HZSM-5 zeolite supported catalyst dealumination hydrothermal treatment high temperature nitrogen treatment
英文摘要	two dealumination methods were used to modify the framework composition of the hzsm-5 zeolite. the structure and acidity of dealuminated zeolite samples were investigated by mas nmr and ft-ir. it was found that the catalytic performance of the mo/hzsm-5 catalyst for methane dehydroaromatization was closely related to the acidity of the hzsm-5 zeolite. on the parent zeolite with n (si)/n (al) approximate to 27, the presence of superfluous strong bronsted acid sites caused severe coke deposition during the reaction. hydrothermal treatment of the parent zeolite extracted tetrahedral al from the framework and thus led to a significant reduction in the number of bronsted acid sites. the formation of aromatics over this hydrothermally treated zeolite was suppressed owing to the deficiency of acid sites available for the aromatization of c-2 intermediates. high-temperature n-2, treatment induced mild dealumination of hzsm-5, destroyed the origin strong bronsted acid sites, but retained sufficient weak acid sites. this treatment effectively restrained coke deposition and satisfied the requirement of the aromatization of c-2 intermediates during the reaction. therefore, a remarkable improvement in the catalyst durability and selectivity for aromatics was observed.
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
关键词[WOS]	hydrothermal post-synthesis ; coke-resistance ; benzene ; naphthalene ; enhance ; aromatization ; conversion
收录类别	SCI
语种	英语
WOS记录号	WOS:000246604600017
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/140668]
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.Shantou Univ, Dept Chem, Shantou 515063, Guangdong, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Song Yibing,Sun Changyong,Wu Yanqing,et al. Methane dehydroaromatization over Mo/HZSM-5 catalyst: Effect of dealumination of HZSM-5 zeolite[J]. chinese journal of catalysis,2007,28(4):371-376.
APA	Song Yibing,Sun Changyong,Wu Yanqing,Shen Wenjie,&Lin Liwu.(2007).Methane dehydroaromatization over Mo/HZSM-5 catalyst: Effect of dealumination of HZSM-5 zeolite.chinese journal of catalysis,28(4),371-376.
MLA	Song Yibing,et al."Methane dehydroaromatization over Mo/HZSM-5 catalyst: Effect of dealumination of HZSM-5 zeolite".chinese journal of catalysis 28.4(2007):371-376.