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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
关键词Methane Carbon Dioxide Reforming Rhodium Metal-support Interaction Oxygen Vacancy Temperature-programmed Oxidation
刊名CHINESE JOURNAL OF CATALYSIS
2007-10-01
28期:10页:865-869
收录类别SCI
文章类型Article
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
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.
语种英语
WOS记录号WOS:000250972600006
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被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140638
专题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
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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.
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