Low-temperature selective oxidation of CO in H-2-rich gases over Ag/SiO2 catalysts
文献类型：期刊论文
| 作者 | Qu, ZP; Cheng, M; Shi, C; Bao, X |
| 刊名 | journal of molecular catalysis a-chemical
 |
| 出版日期 | 2005-09-14 |
| 卷号 | 239期号:1-2页码:22-31 |
| 关键词 | Ag/SiO2 CO selective oxidation H-2-rich gas |
| 英文摘要 | factors influencing basic catalytic activity of ag/sio2 catalysts for co selective oxidation in h-2-rich gases, such as support, silver loading, oxygen concentration and reaction temperature, etc. were investigated. among the supports used, sio2 and the pure silica zeolite are better supports for silver catalyst. ag/sio2 catalyst has a better stabilization for co selective oxidation at low temperatures. carbon monoxide in the presence of large excess of hydrogen can be stoichiometrically oxidized by oxygen over ag/sio2 catalysts at low temperatures, and the catalytic activities increase with the increase of the silver loading. low reaction temperature favors this process of selective oxidation of co in h-rich gas, and the selectivity of o-2 to oxidize co can reach 60-80%. the maximum conversion of co under such selectivity levels for oxygen to oxidize co also increases with the silver loading. xrd results show that the main species on all catalysts is crystallite silver, and the size of the silver particles increases with the silver loading. it is found that the co conversion increases with increasing oxygen contents properly, however, co is not consumed completely even when the overall concentration of o-2 is increased to 3%. pretreatment conditions have been found to strongly influence the activity and selectivity of the catalysts. the catalysts deactivate after pretreatment with hydrogen at 500 degrees c, whereas a better activity is obtained after pretreatment with oxygen or he at the same temperature. (c) 2005 published by elsevier b.v. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | carbon-monoxide oxidation ; silver particles ; nox reduction ; fuel-cells ; oxygen ; epoxidation ; stability ; kinetics ; ethylene ; removal |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000231401000004 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/139863]  |
| 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, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, ZP,Cheng, M,Shi, C,et al. Low-temperature selective oxidation of CO in H-2-rich gases over Ag/SiO2 catalysts[J]. journal of molecular catalysis a-chemical,2005,239(1-2):22-31. |
| APA | Qu, ZP,Cheng, M,Shi, C,&Bao, X.(2005).Low-temperature selective oxidation of CO in H-2-rich gases over Ag/SiO2 catalysts.journal of molecular catalysis a-chemical,239(1-2),22-31. |
| MLA | Qu, ZP,et al."Low-temperature selective oxidation of CO in H-2-rich gases over Ag/SiO2 catalysts".journal of molecular catalysis a-chemical 239.1-2(2005):22-31. |
入库方式： OAI收割
来源：大连化学物理研究所
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