Temperature-staged methanation: An alternative method to purify hydrogen-rich fuel gas for PEFC
文献类型：期刊论文
| 作者 | Xu, Guangwen; Chen, Xin; Zhang, Zhan-Guo |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2006-08-15 |
| 卷号 | 121期号:2-3页码:97-107 |
| 关键词 | selective CO methanation PROX fuel cell hydrogen purification Ru catalyst |
| ISSN号 | 1385-8947 |
| 其他题名 | Chem. Eng. J. |
| 中文摘要 | The preferential CO oxidation (PROX) is considered to be the only reliable technology for purifying hydrogen-rich fuel gases applied to the polymer electrolyte fuel cells (PEFCs), but the technology demands a close control of its oxidant supply. In this article we devised an oxidant-free technology called the temperature-staged methanation. Over a 0.5%Ru/AI203 catalyst we found that the complete selective CO methanation without CO, methanation is possible for hydrogen-rich gases containing CO of up to 1.0 mol%, provided the reaction temperature is controlled to be lower than a critical value. This critical temperature decreased with decreasing the initial CO content in the gas. Consequently, with methanation high-selective CO removal from CO2-rich hydrogenous gases can be realized through dividing the required catalyst bed into more than one reaction zones that run at gradually lower temperatures. While at least one upstream zone at a higher reaction temperature performs to methanate most CO present in the treated gas under selectivity close to 1.0, the last zone at a lower temperature is conditioned to assure the desired outlet CO levels of lower than 100 ppm under selectivity above 0.5. The overall selectivity to methanate CO of the multi-staged reaction system depended on the number of the adopted reaction stages, which was shown to be possibly 0.95 in a three-stage system treating a simulated reformate consisting of (in volume) 69% H-2, 30% CO2, and 1.0% CO and with water steam of 55% of the dry gas. (c) 2006 Elsevier B.V. All rights reserved. |
| 英文摘要 | The preferential CO oxidation (PROX) is considered to be the only reliable technology for purifying hydrogen-rich fuel gases applied to the polymer electrolyte fuel cells (PEFCs), but the technology demands a close control of its oxidant supply. In this article we devised an oxidant-free technology called the temperature-staged methanation. Over a 0.5%Ru/AI203 catalyst we found that the complete selective CO methanation without CO, methanation is possible for hydrogen-rich gases containing CO of up to 1.0 mol%, provided the reaction temperature is controlled to be lower than a critical value. This critical temperature decreased with decreasing the initial CO content in the gas. Consequently, with methanation high-selective CO removal from CO2-rich hydrogenous gases can be realized through dividing the required catalyst bed into more than one reaction zones that run at gradually lower temperatures. While at least one upstream zone at a higher reaction temperature performs to methanate most CO present in the treated gas under selectivity close to 1.0, the last zone at a lower temperature is conditioned to assure the desired outlet CO levels of lower than 100 ppm under selectivity above 0.5. The overall selectivity to methanate CO of the multi-staged reaction system depended on the number of the adopted reaction stages, which was shown to be possibly 0.95 in a three-stage system treating a simulated reformate consisting of (in volume) 69% H-2, 30% CO2, and 1.0% CO and with water steam of 55% of the dry gas. (c) 2006 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Environmental ; Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CARBON-MONOXIDE ; CELL APPLICATIONS ; REFORMED GAS ; H-2-RICH GAS ; CO ; OXIDATION ; CATALYSTS ; SYSTEMS ; H-2 |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000239295800006 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4101]  |
| 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, Beijing 100080, Peoples R China 2.Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan |
| 推荐引用方式 GB/T 7714 | Xu, Guangwen,Chen, Xin,Zhang, Zhan-Guo. Temperature-staged methanation: An alternative method to purify hydrogen-rich fuel gas for PEFC[J]. CHEMICAL ENGINEERING JOURNAL,2006,121(2-3):97-107. |
| APA | Xu, Guangwen,Chen, Xin,&Zhang, Zhan-Guo.(2006).Temperature-staged methanation: An alternative method to purify hydrogen-rich fuel gas for PEFC.CHEMICAL ENGINEERING JOURNAL,121(2-3),97-107. |
| MLA | Xu, Guangwen,et al."Temperature-staged methanation: An alternative method to purify hydrogen-rich fuel gas for PEFC".CHEMICAL ENGINEERING JOURNAL 121.2-3(2006):97-107. |
入库方式： OAI收割
来源：过程工程研究所
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