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题名: High temperature desorbed hydrogen in Ni/La2O3/alpha-Al(2)O(3)improves the initial reaction rate of CH4/CO2 reforming
作者: Cui Yuehua;  Xu Hengyong;  Ge Qingjie;  Bi Yadong;  Wang Yuzhong;  Hou Shoufu;  Li Wenzhao
关键词: high-temperature desorbed hydrogen ;  nickel-based catalyst ;  lanthana ;  methane reforming reaction ;  initial rate
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2006-08-01
卷: 27, 期:8, 页:659-663
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
英文摘要: The hydrogen desorbed at high temperature (high-temperature hydrogen) over the hydrogen reduced catalyst Ni/La2O3/alpha-Al2O3 was observed by H-2 temperature-programmed desorption. Kinetic experiments show that the activity of the reforming reaction is initially increased with the amount of high-temperature hydrogen in Ni/La2O3/alpha-Al2O3 and finally reaches a constant value due to the in situ generation of the high-temperature hydrogen. Pulse results indicate that the high-temperature hydrogen in Ni/La2O3/alpha-Al2O3 is prone to form CH. species with high x values, which has higher activity for the reaction of CHx with CO2. The Ni/La2O3/alpha-Al2O3 catalyst with plenty of high-temperature hydrogen can increase the x values of CHx species and decrease the activation energy for the reaction between CHx and CO2, leading to a higher reaction rate. The addition of La2O3 on the Ni/alpha-Al2O3 catalyst promotes the reverse water-gas shift reaction and slightly improves the activation of CO2. La2O3 also increases the amount of high-temperature hydrogen and its stability, resulting in higher x values of CHx species and improving the reforming reaction rate.
关键词[WOS]: NI-H ;  NICKEL-CATALYSTS ;  METHANE ;  CARBON ;  CO2 ;  BEHAVIOR ;  CH4 ;  ADSORPTION ;  SPILLOVER ;  MECHANISM
语种: 英语
WOS记录号: WOS:000240609300005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140230
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Cui Yuehua,Xu Hengyong,Ge Qingjie,et al. High temperature desorbed hydrogen in Ni/La2O3/alpha-Al(2)O(3)improves the initial reaction rate of CH4/CO2 reforming[J]. CHINESE JOURNAL OF CATALYSIS,2006,27(8):659-663.
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