热门
A thermodynamic analysis of methanation reactions of carbon oxides for the production of synthetic natural gas
文献类型：期刊论文
| 作者 | Gao, Jiajian1,2; Wang, Yingli1; Ping, Yuan1; Hu, Dacheng1; Xu, Guangwen1; Gu, Fangna1; Su, Fabing1 |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2012 |
| 卷号 | 2期号:6页码:2358-2368 |
| 关键词 | SELECTIVE METHANATION HYDROGEN-PRODUCTION CATALYSTS DIOXIDE CO2 GLYCERIN |
| ISSN号 | 2046-2069 |
| 通讯作者 | Gao, JJ |
| 英文摘要 | Synthetic natural gas (SNG) can be obtained via methanation of synthesis gas (syngas). Many thermodynamic reaction details involved in this process are not yet fully understood. In this paper, a comprehensive thermodynamic analysis of reactions occurring in the methanation of carbon oxides (CO and CO2) is conducted using the Gibbs free energy minimization method. The equilibrium constants of eight reactions involved in the methanation reactions were calculated at different temperatures. The effects of temperature, pressure, ratio of H-2/CO (and H-2/CO2), and the addition of other compounds (H2O, O-2, CH4, and C2H4) in the feed gas (syngas) on the conversion of CO and CO2, CH4 selectivity and yield, as well as carbon deposition, were carefully investigated. In addition, experimental data obtained on commercial Ni-based catalysts for CO methanation and three cases adopted from the literature were compared with the thermodynamic calculations. It is found that low temperature, high pressure, and a large H-2/CO (and H-2/CO2) ratio are favourable for the methanation reactions. Adding steam into the feed gas could alleviate the carbon deposition to a large extent. Trace amounts of O-2 in syngas is unfavourable for SNG generation although it can lower carbon deposition. Additional CH4 in the feed gas almost has no influence on the CO conversion and CH4 yield, but it leads to the increase of carbon formed. Introduction of a small amount of C2H4, a representative of hydrocarbons in syngas, results in low CH4 yield and serious carbon deposition although it does not affect CO conversion. CO is relatively easy to hydrogenated compared to CO2 at the same reaction conditions. The comparison of thermodynamic calculations with experimental results demonstrated that the Gibbs free energy minimization method is significantly effective for understanding the reactions occurring in methanation and helpful for the development of catalysts and processes for the production of SNG. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | SELECTIVE METHANATION ; HYDROGEN-PRODUCTION ; CATALYSTS ; DIOXIDE ; CO2 ; GLYCERIN |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300828400035 |
| 公开日期 | 2013-10-25 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4120]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Jiajian,Wang, Yingli,Ping, Yuan,et al. A thermodynamic analysis of methanation reactions of carbon oxides for the production of synthetic natural gas[J]. RSC ADVANCES,2012,2(6):2358-2368. |
| APA | Gao, Jiajian.,Wang, Yingli.,Ping, Yuan.,Hu, Dacheng.,Xu, Guangwen.,...&Su, Fabing.(2012).A thermodynamic analysis of methanation reactions of carbon oxides for the production of synthetic natural gas.RSC ADVANCES,2(6),2358-2368. |
| MLA | Gao, Jiajian,et al."A thermodynamic analysis of methanation reactions of carbon oxides for the production of synthetic natural gas".RSC ADVANCES 2.6(2012):2358-2368. |
入库方式： OAI收割
来源：过程工程研究所
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。