Effects of promoter La2O3 and supports on kinetic parameters of dissociation activation of CH4 over ni-based catalysts
文献类型：期刊论文
| 作者 | Cui Yuehua; Xu Hengyong; Ge Qingjie; Wang Yuzhong; Hou Shoufu; Li Wenzhao |
| 刊名 | chinese journal of catalysis
 |
| 出版日期 | 2006-06-01 |
| 卷号 | 27期号:6页码:479-484 |
| 关键词 | methane dissociation nickel-based catalyst lanthana activation energy pre-exponential factor |
| 英文摘要 | the influence of mgal2o4 and alpha-al2o3 supports, and la2o3 promoter on the ch4 dissociation was studied by pulsing ch4 over catalysts ni/alpha-al2o3 (a), ni/la2o3/alpha-al2o3 (a-l), ni/mgal2o4 (m), and ni/la2o3/mgal2o4 (m-l). in these unsteady pulse reactions, the carbon species coverage on the catalysts was kept less than 100% and the information about ch4 dissociation on the fresh ni active sites was disclosed. kinetic parameters for the ch4 dissociation over these catalysts were obtained under reaction conditions free from heat and mass transfer limitations. the ch4 dissociation activation energy (e.) on catalysts a, a-l, m, and m-l is 90.9, 111.8, 79.5, and 85.9 kj/mol, respectively. the e-a values on catalysts m and m-l are lower than those on catalysts a and a-l. the la2o3 promoter increases the e. of ch4 dissociation. there is a compensation effect between the activation energy and the pre-exponential factor in the ch4 dissociation on the ni-based catalysts, which reduces the influence of the supports and promoter on the ch4 dissociation. |
| 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] | nickel-catalysts ; methane ; carbon ; co2 ; mechanism ; ni(111) ; decomposition ; explanation ; cracking ; growth |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000239190800007 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140050]  |
| 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, Lab Nat Gas Utilizat & Appl Catalysis, Dalian 116023, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui Yuehua,Xu Hengyong,Ge Qingjie,et al. Effects of promoter La2O3 and supports on kinetic parameters of dissociation activation of CH4 over ni-based catalysts[J]. chinese journal of catalysis,2006,27(6):479-484. |
| APA | Cui Yuehua,Xu Hengyong,Ge Qingjie,Wang Yuzhong,Hou Shoufu,&Li Wenzhao.(2006).Effects of promoter La2O3 and supports on kinetic parameters of dissociation activation of CH4 over ni-based catalysts.chinese journal of catalysis,27(6),479-484. |
| MLA | Cui Yuehua,et al."Effects of promoter La2O3 and supports on kinetic parameters of dissociation activation of CH4 over ni-based catalysts".chinese journal of catalysis 27.6(2006):479-484. |
入库方式： OAI收割
来源：大连化学物理研究所
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