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题名: Influence of the nanoscale support on carbon deposition and carbon elimination over Ni/gamma-Al2O3 catalyst for CH4 conversion
作者: Yang, YL;  Xu, HY;  Li, WZ
关键词: Ni/gamma-Al2O3 catalyst ;  nanoscale support ;  carbon deposition ;  carbon elimination ;  metal-support interaction
刊名: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
发表日期: 2004-09-01
DOI: 10.1166/jnn.2004.118
卷: 4, 期:7, 页:891-895
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Characteristics of carbon deposition by CH4 and carbon elimination by CO2 over conventional and nanoscale Ni/gamma-Al2O3 catalysts were investigated by using a pulse reaction, as well as by TGA, TEM, TPO-MS, H-2-TPR and H-2-chemisorption techniques. It was found that the behaviors of carbon deposition by CH4 decomposition and carbon elimination by CO2 depend on the active metal dispersion and the metal-support interaction. The filamentous carbon was formed on the conventional Ni/gamma-Al2O3 catalyst with low metal dispersion and relatively large particles, this type of filamentous carbon was far from the active centers and difficult to eliminate by CO2. On the other hand, the carbon deposition originated from CH4 decomposition on the nanoscale Ni/gamma-Al2O3 catalyst would mainly cover the surface of active centers, this type of highly active carbon was easily eliminated by CO2 because it is close to the active center Ni atoms. As a result, the improvement of coking-resistance was ascribed to the high metal dispersion and strong metal-support interaction, a model of CH4 decomposition carbon deposition on Ni/gamma-Al2O3 catalyst was proposed.
关键词[WOS]: SYNTHESIS GAS ;  SOL-GEL ;  NI/AL2O3 CATALYST ;  PARTIAL OXIDATION ;  METHANE ;  DIOXIDE ;  SYNGAS ;  METALS ;  CO2 ;  NI
语种: 英语
WOS记录号: WOS:000224611300034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139377
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, Peoples R China

Recommended Citation:
Yang, YL,Xu, HY,Li, WZ. Influence of the nanoscale support on carbon deposition and carbon elimination over Ni/gamma-Al2O3 catalyst for CH4 conversion[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2004,4(7):891-895.
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