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Methane Diffusion Properties in Different Anthracite Coals
DOI:10.1021/acs.energyfuels.6c00221.png)
摘要
En 中文
甲烷在煤中的扩散特性是评价煤层气运移和产出的关键参数。本研究选取4个无烟煤样品进行变温变压条件下的等温吸附实验。利用等温吸附数据,计算了甲烷的有效扩散系数(D e)。建立了D e的Langmuir方程,并计算了相关参数。研究表明,在不同实验条件下甲烷的有效扩散系数遵循Langmuir曲线规律。这允许计算和拟合Langmuir有效扩散系数(D eL)。在不同温度和压力条件下,无烟煤样品的D eL计算值范围为4.33 × 10⁻⁵至8.57 × 10⁻⁵ s⁻¹。甲烷在无烟煤中的扩散特性与压力、温度、煤质特性及孔隙结构密切相关且呈正相关。通过整合Langmuir参数、压力、温度、煤质特性及总微孔体积,建立了预测无烟煤中D e的计算模型。该模型结合了D e的多种影响因素,为煤层中扩散特性的计算提供了理论依据和新的方法。
Keyword:
ADSORPTION CAPACITY
GAS-DIFFUSION
CH4
CO2
期刊
E
IF:
0
论文数:
533
被引数:
0
机构
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