Displacement and Diffusion of Methane and Carbon Dioxide in SBA-15 Studied by NMR
文献类型：期刊论文
| 作者 | Bao, Xinhe1; Hu, Yuanli1,2; Pan, Xiulian1; Han, Xiuwen1 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2017-02-02 |
| 卷号 | 121期号:4页码:2481-2486 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/acs.jpcc.6b12250 |
| 文献子类 | Article |
| 英文摘要 | With increasing concern about the environmental impact of shale gas exploitation, nonaqueous fracturing with carbon dioxide has emerged as a promising alternative to increase gas production and, at the same time, to store large amounts of CO2. The key process of CH4 displacement by CO2 is worth a systematic investigation from aspects of both experiment and simulation. In this work, the CH4 and CO2 displacement was studied with in situ C-13 NMR in the pores of silica (SBA-15), which were functionalized with organic groups such as phenyl and cyclohexyl, in order to model the organic matter in shale with different aromaticity. Due to the stronger adsorption strength and higher capacity of CO2 in SBA-15, CH4 can be easily stripped out of the pores by CO2, while the reverse process to displace CO2 with CH4 is not effective. Even though the displacement effect in the pores of SBA-15 with a higher aromaticity is relatively better at room temperature, the superiority is eliminated by high temperature. Furthermore, the results of pulse field gradient (PEG) NMR demonstrate that the self-diffusion coefficient of CO2 is an order of magnitude smaller than that of CH4, and the existence of CO, slows down the diffusion of CH4 slightly. The gas diffusion in both scenarios follows the trend: SBA-15 > SBA-phenyl > SBA-cyclohexyl. |
| WOS关键词 | MOLECULAR-DYNAMICS SIMULATIONS ; SHALE GAS ; CO2 ; ADSORPTION ; RECOVERY ; MONTMORILLONITE ; SEQUESTRATION ; CHALLENGES ; INJECTION ; PORES |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000393443200052 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169674]  |
| 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 |
| 通讯作者 | Bao, Xinhe; Pan, Xiulian |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bao, Xinhe,Hu, Yuanli,Pan, Xiulian,et al. Displacement and Diffusion of Methane and Carbon Dioxide in SBA-15 Studied by NMR[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(4):2481-2486. |
| APA | Bao, Xinhe,Hu, Yuanli,Pan, Xiulian,&Han, Xiuwen.(2017).Displacement and Diffusion of Methane and Carbon Dioxide in SBA-15 Studied by NMR.JOURNAL OF PHYSICAL CHEMISTRY C,121(4),2481-2486. |
| MLA | Bao, Xinhe,et al."Displacement and Diffusion of Methane and Carbon Dioxide in SBA-15 Studied by NMR".JOURNAL OF PHYSICAL CHEMISTRY C 121.4(2017):2481-2486. |
入库方式： OAI收割
来源：大连化学物理研究所
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