The sintering of Ni/Al2O3 methanation catalyst for substitute natural gas production
文献类型：期刊论文
| 作者 | Bai, Xiaobo1,2; Wang, Sheng1; Sun, Tianjun1; Wang, Shudong1 |
| 刊名 | reaction kinetics mechanisms and catalysis
 |
| 出版日期 | 2014-08-01 |
| 卷号 | 112期号:2页码:437-451 |
| 关键词 | Methanation catalyst Sintering Co-precipitation Substitute natural gas |
| 通讯作者 | 王树东 |
| 英文摘要 | the sintering behavior of a co-precipitated ni/al2o3 methanation catalyst is studied by investigating the effect of treating time, temperature and atmosphere. fresh and sintered samples are characterized by n-2 physisorption, h-2 chemisorption, temperature programmed reduction, x-ray diffraction and transmission electron microscopy. a reduction both in total and nickel surface area has been observed, the extent depending on the experimental conditions. sintering of the studied catalyst, reflected by a significant decrease of nickel surface area, is a combined effect of primary encapsulation of metallic nickel due to the collapse of the support structure and sporadic agglomeration of nickel crystallites. the formation of a ni2+ doped alumina phase, induced by steam ambience, further accelerates loss of surface nickel atoms. it is found that the sintering rate obeys a simple power law expression, with the apparent activation energy value of 118 kj/mol. the sintered methanation catalyst suffers considerable decay of co hydrogenation activity in a simulated industrial atmosphere, which suggests that extraordinarily high temperatures should be avoided as much as possible in the practical operation. |
| 学科主题 | 物理化学 |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | steam-reforming catalysts ; alumina-supported nickel ; temperature ; deactivation ; precursors ; reduction ; stability ; reactor |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339378700012 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/143976]  |
| 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, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bai, Xiaobo,Wang, Sheng,Sun, Tianjun,et al. The sintering of Ni/Al2O3 methanation catalyst for substitute natural gas production[J]. reaction kinetics mechanisms and catalysis,2014,112(2):437-451. |
| APA | Bai, Xiaobo,Wang, Sheng,Sun, Tianjun,&Wang, Shudong.(2014).The sintering of Ni/Al2O3 methanation catalyst for substitute natural gas production.reaction kinetics mechanisms and catalysis,112(2),437-451. |
| MLA | Bai, Xiaobo,et al."The sintering of Ni/Al2O3 methanation catalyst for substitute natural gas production".reaction kinetics mechanisms and catalysis 112.2(2014):437-451. |
入库方式： OAI收割
来源：大连化学物理研究所
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