Effect of potassium promoter on reaction performance of Rh/Al2O3 catalyst for CO selective oxidation in H-2-rich streams
文献类型：期刊论文
| 作者 | Chen, GW; Li, SL; Yuan, Q; Jiao, FJ |
| 刊名 | chinese journal of catalysis
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 26期号:9页码:809-814 |
| 关键词 | potassium promoter rhodium alumina supported catalyst carbon monoxide selective oxidation hydrogen surface hydroxyl group chemical adsorption |
| 英文摘要 | it is indispensable to remove co to less than 50 x 10(-6) from a h-2-rich feed gas for proton exchange membrane fuel cells. the promoting effect of potassium on the rh/al2o3 catalyst has been found in the co preferential oxidation with o-2 under h-2-rich streams, co conversion as high as 99.82% can be achieved, and methanation can be restrained. in this paper, the effect of potassium promoter on co adsorption states and surface chemisorbed species in the co selective oxidation process under h-2-rich streams over rh/al2o3 was investigated by in situ temperature-programming and ft-ir, co-tpd and xrd. the results indicate that co adsorption states on rh/al2o3 are not changed, but the co adsorption intensity is weakened when potassium is added. the linear and bridged co adsorbed on active sites of rh-k/al2o3 is fully desorbed at 120 and 180 degrees c, respectively. the mechanism of formate and carbonate species formation is also discussed. the experimental results of catalytic activity show that there exists an optimum loading of potassium on the rh/al2o3 catalyst to obtain both higher co conversion and less methane product. |
| 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] | fuel-cell applications ; carbon-monoxide ; microchannel reactor ; hydrogen ; removal |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000232474800018 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/139834]  |
| 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, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, GW,Li, SL,Yuan, Q,et al. Effect of potassium promoter on reaction performance of Rh/Al2O3 catalyst for CO selective oxidation in H-2-rich streams[J]. chinese journal of catalysis,2005,26(9):809-814. |
| APA | Chen, GW,Li, SL,Yuan, Q,&Jiao, FJ.(2005).Effect of potassium promoter on reaction performance of Rh/Al2O3 catalyst for CO selective oxidation in H-2-rich streams.chinese journal of catalysis,26(9),809-814. |
| MLA | Chen, GW,et al."Effect of potassium promoter on reaction performance of Rh/Al2O3 catalyst for CO selective oxidation in H-2-rich streams".chinese journal of catalysis 26.9(2005):809-814. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。