中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Methane dehydro-aromatization over Co-modified Mo/MCM-22 catalysts in the absence of oxygen and coke deposition

文献类型:期刊论文

作者Tian, BL; Liu, HM; Su, LL; Shu, YY; Xu, YD
刊名chinese journal of catalysis
出版日期2001-03-01
卷号22期号:2页码:124-128
关键词methane aromatization cobalt oxide molybdenurn oxide MCM-22 zeolite coke
英文摘要mo/mcm-22 is a new type catalyst for methane dehydro-aromatization in the absence of oxygen, over which methane can be converted to aromatics with high benzene selectivity and catalytic stability. in this topic, we mainly discuss the promotional effect by the addition of co to the mo/mcm-22 catalyst as the second component. it suggests that different steeping methods have different affection to the catalyst. coimpregnating co and mo ((co, mo)/mcm-22) results in better catalytic activity while first dipping with mo and second with co (co-mo/mcm-22) results in better catalytic stability with a co/mo atomic, ratio of 0.2. x-ray diffraction results indicate that the coo and moo3 can be highly distributed on the mcm-22 zeolite and their loadings weaken the zeolite's x-ray diffraction peak intensity. the coke that forms at low space velocity is mainly the graphitic type coke and that forms at high space velocity is mainly the pre-graphitic type one, which plays a key role to the catalytic deactivation. thermogravimetric studies show that there is mainly two types of coke on the catalysts. the easy-burning coke is the main type coke which leads to the catalytic deactivation and the hard-burning coke has no effect on the catalytic deactivation. hard-burning coke may be a heavy-hydrocarbon type coke that locates in the zeolite's large cages.
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]surface ; benzene
收录类别SCI
语种英语
WOS记录号WOS:000170359000007
公开日期2015-11-10
源URL[http://159.226.238.44/handle/321008/138846]  
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, Key State Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Tian, BL,Liu, HM,Su, LL,et al. Methane dehydro-aromatization over Co-modified Mo/MCM-22 catalysts in the absence of oxygen and coke deposition[J]. chinese journal of catalysis,2001,22(2):124-128.
APA Tian, BL,Liu, HM,Su, LL,Shu, YY,&Xu, YD.(2001).Methane dehydro-aromatization over Co-modified Mo/MCM-22 catalysts in the absence of oxygen and coke deposition.chinese journal of catalysis,22(2),124-128.
MLA Tian, BL,et al."Methane dehydro-aromatization over Co-modified Mo/MCM-22 catalysts in the absence of oxygen and coke deposition".chinese journal of catalysis 22.2(2001):124-128.

入库方式: OAI收割

来源:大连化学物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。