二元气体等温吸附实验及其对煤层甲烷开发的意义

唐书恒; 汤达祯; 杨起

二元气体等温吸附实验及其对煤层甲烷开发的意义

中国地质大学能源地质系, 北京 100083

基金项目:

国家重点基础研究发展规划项目 2002CB211702

国家自然科学基金项目 40272069

高等学校博士学科点专项科研基金项目 20020491003

详细信息

作者简介:
唐书恒(1965-), 男, 博士, 主要研究方向为煤层气地质与煤层气开发.E-mail: tangshuhen@263.net

中图分类号: P618.11
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出版历程
- 收稿日期: 2003-06-11
- 刊出日期: 2004-03-25

Binary-Component Gas Adsorption Isotherm Experiments and Their Significance to Exploitation of Coalbed Methane

Energy Geology Department, China University ofGeosciences, Beijing 100083, China

摘要

摘要: 分别进行了CH₄-CO₂和CH₄-N₂二元混合气体的等温吸附实验, 并且分析了二元气体在吸附过程中各组分浓度的变化规律.结果表明, 在CH₄-N₂二元气体的吸附过程中, 吸附相中CH₄组分的相对浓度逐渐增加, N₂组分的相对浓度逐渐减少.在CO₂-CH₄二元气体的吸附过程中, 吸附相中CO₂组分的相对浓度逐渐增加, CH₄组分的相对浓度逐渐减少.实验结果证实了CO₂在与CH₄的竞争吸附中占据优势, 而N₂在与CH₄的竞争吸附中处于劣势.注入CO₂比注入N₂可以更有效地置换或驱替煤层甲烷, 提高煤层甲烷的采收率.
- 二元气体 /
- 等温吸附实验 /
- 竞争吸附 /
- 煤层甲烷 /
- 提高采收率
Abstract: The adsorption isotherm experiments of CH₄-CO₂ and CH₄-N₂ binary-component gas were carried out respectively, and the variation regularity of each component concentration in the experiments were analyzed. The experiment results indicate that the relative concentration of CH₄ component in absorbed phase increases gradually while the relative concentration of N₂ component in absorbed phase decreases gradually in the adsorption isotherm experiment of CH₄-N₂ binary-component gas. Whereas the relative concentration of CO₂ component in absorbed phase shows a gradual increase and the relative concentration of CH₄ component shows a gradual decrease in the adsorption isotherm experiment of CO₂-CH₄ binary-component gas. These results confirm that CO₂ occupies the predominant position and N₂ locates at inferior position as they compete for adsorption with CH₄ respectively. Therefore, CO₂-injection can replace or displace coalbed methane and enhance methane recovery more effectively than N₂-injection.
- binary-component gas /
- adsorption isotherm experiment /
- competitive adsorption /
- coalbed methane /
- enhancing recovery

HTML全文

图 1 CH₄与N₂二元气体吸附实验中吸附相浓度

Fig. 1. Absorbed-gas concentration in CH₄-N₂ binary-component gas adsorption isotherm experiment

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图 2 CH₄与CO₂二元气体吸附实验中吸附相浓度

Fig. 2. Absorbed-gas concentration in CH₄-CO₂ binary-component gas adsorption isotherm experiment

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图 3 CH₄与N₂二元气体吸附实验中的吸附量

Fig. 3. Absorbed amount of each component in CH₄-N₂ binary-component gas adsorption isotherm experiment

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图 4 CH₄与CO₂二元气体吸附实验中的吸附量

Fig. 4. Absorbed amount of each component in CH₄-CO₂ binary-component gas adsorption isotherm experiment

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表 1 3种纯气体的等温吸附实验结果

Table 1. Adsorption isotherm experiments results of three pure gases

表 2 二元气体等温吸附实验中游离组分浓度

Table 2. Free-gas concentration in adsorption isotherm experiments of binary-component gas

表 3 二元气体等温吸附实验中吸附相组分浓度

Table 3. Absorbed-gas concentration in adsorption isotherm experiments of binary-component gas

表 4 二元气体等温吸附实验中各组分的吸附量

Table 4. Absorbed amount of each component in adsorption isotherm experiments of binary-component gas

参考文献(10)

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唐书恒, 杨起, 汤达祯, 2003. 二元混合气体等温吸附实验结果与扩展Langmuir方程预测值的比较. 地质科技情报, 22(2): 68-70. doi: 10.3969/j.issn.1000-7849.2003.02.014