Effect of metal-support interaction on coking resistance of Rh-based catalysts in CH4/CO2 reforming

	Effect of metal-support interaction on coking resistance of Rh-based catalysts in CH4/CO2 reforming
	Wang Rui ; Liu Xuebin ; Chen Yanxin ; Li Wenzhao ; Xu Hengyong
刊名	chinese journal of catalysis
	2007-10-01
卷号	28 期号:10 页码:865-869
关键词	methane carbon dioxide reforming rhodium metal-support interaction oxygen vacancy temperature-programmed oxidation
英文摘要	the effects of metal-support interaction on coking resistance of rh/al2o3, rh/sio2, and rh/ceo2 catalysts during ch4/co2 reforming were investigated. temperature-programmed reduction and temperature-programmed oxidation (tpo) over fresh and used catalysts suggested that for rh/al2o3 and rh/sio2, the strong interaction between the metal and support led to a high dispersion of rh after reduction. the ch, species formed on well-dispersed rh with small rh crystals could act as active intermediates to react with co2 to form co and h-2 . on the other hand, the carbon species formed on isolated rh with large rh crystals had a relatively low reactivity with co2, which was attributed to the deactivation of catalysts. for the rh/ceo2 catalyst, tpo and co2 pulse experiment results indicated that the ch, species formed were more reactive than those formed on rh/al2o3 and rh/sio2. the unique rh-ceo2 interaction resulted in the creation of ceo2-x and oxygen vacancies after partial reduction of ceo2, which facilitated the co2 dissociation. as a result, the dissociated surface oxygen could readily react with ch, species, thereby inhibiting the carbon deposition over rh/ceo2.
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]	carbon-dioxide ; synthesis gas ; rhodium catalysts ; methane ; co2 ; deactivation ; oxidation ; pathways ; oxide ; ch4
收录类别	SCI
语种	英语
WOS记录号	WOS:000250972600006
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/140638]
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, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ Beijing, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang Rui,Liu Xuebin,Chen Yanxin,et al. Effect of metal-support interaction on coking resistance of Rh-based catalysts in CH4/CO2 reforming[J]. chinese journal of catalysis,2007,28(10):865-869.
APA	Wang Rui,Liu Xuebin,Chen Yanxin,Li Wenzhao,&Xu Hengyong.(2007).Effect of metal-support interaction on coking resistance of Rh-based catalysts in CH4/CO2 reforming.chinese journal of catalysis,28(10),865-869.
MLA	Wang Rui,et al."Effect of metal-support interaction on coking resistance of Rh-based catalysts in CH4/CO2 reforming".chinese journal of catalysis 28.10(2007):865-869.