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| 论文编号: |
122214O120110255 |
| 第一作者所在部门: |
904组 |
| 中文论文题目: |
A Study on Permeability of CH4 Pre-Adsorbed Yangquan Coal Matrix-Plug to CO2 and He
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| 英文论文题目: |
A Study on Permeability of CH4 Pre-Adsorbed Yangquan Coal Matrix-Plug to CO2 and He
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| 论文题目英文: |
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| 作者: |
杨建丽
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| 论文出处: |
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| 刊物名称: |
The 28th Annual International Pittsburgh Coal Conferenc
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| 年: |
2011
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| 卷: |
0 |
| 期: |
0 |
| 页: |
59 |
| 联系作者: |
杨建丽 |
| 收录类别: |
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| 影响因子: |
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| 摘要: |
The CO2 permeability of a CH4 saturated coal matrix-plug（？ 6 mm, length 13mm）, from Yangquan, China, was studied by carrying out CO2 breakthrough tests at 40°C. The similar tests were performed with respect to the inert gas He for comparison. The breakthrough tests were carried out in a self-confining flow cell equipped with an online thermal conductivity detector for continuous monitoring the CO2 or He signal. The retention of gas by coal and the influence of the pore gas pressure were investigated. It was found that unlike He there was significant residual CO2 left in the coal matrix even after CO2 was flushedby CH4 for 36 hours. It reveals that coal has a relative stronger retention capacity for CO2, which leads to the difference in its breakthrough time for different CH4 flushing time. No notable residual He was found during the breakthrough tests. The He permeability of the test coal plug was found to be significantly higher than for CO2. The obtained permeability coefficients of the coal plug with respect to CO2 or He at steady state are similar for the repeat breakthrough tests. This implies that no significant structural changes occurred during the tests. The permeability coefficients varied with pore gas pressure due to changes in pore wall interactions (Klinkenberg effect), the swelling of coal and the adsorption boundary layer. |
| 英文摘要: |
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关闭窗口 |
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