Highly active and stable Ni/gamma-Al2O3 catalysts selectively deposited with CeO2 for CO methanation dagger
文献类型：期刊论文
| 作者 | Liu, Qing1; Gao, Jiajian1; Zhang, Meiju1; Li, Huifang1; Gu, Fangna1; Xu, Guangwen1; Zhong, Ziyi2; Su, Fabing1 |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2014 |
| 卷号 | 4期号:31页码:16094-16103 |
| 关键词 | SYNTHETIC NATURAL-GAS ATOMIC LAYER DEPOSITION NI/AL2O3 CATALYSTS CARBON-DIOXIDE SYNGAS METHANATION OXIDATION OXIDE DEACTIVATION HYDROGEN PERFORMANCE |
| ISSN号 | 2046-2069 |
| 其他题名 | RSC Adv. |
| 中文摘要 | We report the preparation of highly active, coking-and sintering-resistant CeO2-decorated Ni/gamma-Al2O3 catalysts by an impregnation method followed by a modified deposition-precipitation (DP) of CeO2. The samples were characterized by nitrogen adsorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, H-2 temperature-programmed reduction, H2 temperature-programmed desorption and zeta potential analysis. The results revealed that compared with the Ni catalysts with a NiO loading of 40 wt% prepared by co-impregnation (CI) and sequential impregnation (SI) methods, the Ni catalyst synthesized by DP method showed enhanced catalytic performance for CO methanation at atmospheric pressure and an extremely high weight hourly space velocity (WHSV) of 240 000 mL g(-)1 h(-1). In a 50 h high-pressure life-test, this catalyst showed a high resistance to both coking and sintering. It was found that CeO2 nanoparticles were selectively deposited on the surface of NiO rather than on Al2O3 due to the electrostatic interaction during the DP process, effectively preventing Ni particles from sintering during the reduction and reaction at high temperatures, and inhibiting coke formation by increasing the supply of active oxygen species on the nickel surface. As a result, the formed CeO2-decorated Ni/Al2O3 catalyst exhibited excellent catalytic performance and stability in CO methanation. This work demonstrated that catalytic properties could be much improved for a usual catalyst with a well-designed structure. |
| 英文摘要 | We report the preparation of highly active, coking-and sintering-resistant CeO2-decorated Ni/gamma-Al2O3 catalysts by an impregnation method followed by a modified deposition-precipitation (DP) of CeO2. The samples were characterized by nitrogen adsorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, H-2 temperature-programmed reduction, H2 temperature-programmed desorption and zeta potential analysis. The results revealed that compared with the Ni catalysts with a NiO loading of 40 wt% prepared by co-impregnation (CI) and sequential impregnation (SI) methods, the Ni catalyst synthesized by DP method showed enhanced catalytic performance for CO methanation at atmospheric pressure and an extremely high weight hourly space velocity (WHSV) of 240 000 mL g(-)1 h(-1). In a 50 h high-pressure life-test, this catalyst showed a high resistance to both coking and sintering. It was found that CeO2 nanoparticles were selectively deposited on the surface of NiO rather than on Al2O3 due to the electrostatic interaction during the DP process, effectively preventing Ni particles from sintering during the reduction and reaction at high temperatures, and inhibiting coke formation by increasing the supply of active oxygen species on the nickel surface. As a result, the formed CeO2-decorated Ni/Al2O3 catalyst exhibited excellent catalytic performance and stability in CO methanation. This work demonstrated that catalytic properties could be much improved for a usual catalyst with a well-designed structure. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | SYNTHETIC NATURAL-GAS ; ATOMIC LAYER DEPOSITION ; NI/AL2O3 CATALYSTS ; CARBON-DIOXIDE ; SYNGAS METHANATION ; OXIDATION ; OXIDE ; DEACTIVATION ; HYDROGEN ; PERFORMANCE |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000334681800036 |
| 公开日期 | 2014-08-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/10939]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.ASTAR, Inst Chem Engn & Sci, Singapore 627833, Singapore |
| 推荐引用方式 GB/T 7714 | Liu, Qing,Gao, Jiajian,Zhang, Meiju,et al. Highly active and stable Ni/gamma-Al2O3 catalysts selectively deposited with CeO2 for CO methanation dagger[J]. RSC ADVANCES,2014,4(31):16094-16103. |
| APA | Liu, Qing.,Gao, Jiajian.,Zhang, Meiju.,Li, Huifang.,Gu, Fangna.,...&Su, Fabing.(2014).Highly active and stable Ni/gamma-Al2O3 catalysts selectively deposited with CeO2 for CO methanation dagger.RSC ADVANCES,4(31),16094-16103. |
| MLA | Liu, Qing,et al."Highly active and stable Ni/gamma-Al2O3 catalysts selectively deposited with CeO2 for CO methanation dagger".RSC ADVANCES 4.31(2014):16094-16103. |
入库方式： OAI收割
来源：过程工程研究所
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