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开滦矿区晚古生代煤CH_4/CO_2二元气体等温吸附预测 被引量:4

Predictions for Isothermal Adsorption of CH_4/CO_2 Binary Gas for the Late Paleozoic Coals from the Kailuan Coalfield of Hebei
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摘要 用扩展Langmuir方程、理想吸附溶液理论和数值分析方法对开滦矿区不同变质程度煤对CO2/CH4二元气体的吸附量进行了预测,并用平均相对误差检验了其预测精度。结果表明:同一预测方法对开滦矿区不同变质程度煤的总吸附量预测准确度存在明显差异,理想吸附溶液理论法相对于扩展Langmuir方程法和数值分析法,其预测结果与实验值的拟合程度较好;理想吸附溶液理论对混合气体吸附预测的准确度取决于所预测的煤样煤质指标和煤样对纯气体的Langmuir等温吸附常数。在同样使用理想吸附溶液理论预测时,相对于低变质程度煤,中等变质程度煤的预测结果与实验值吻合程度更好。开滦矿区低变质程度林南仓矿11号煤预测的平均相对误差高到49.22%,所以还需对其进行混合气体的等温吸附实验,才能获得较准确的吸附特性参数. The total adsorbed amounts of CH4/CO2 binary gas on two coals with different rank from the Kailuan coalfield of Hebei province were predicted using the extended Langmuir, ideal adsorbed solution theory (IAST) and the numerical analysis method, and their deviations of the prediction accuracy were analyzed as well. The results show that the prediction accuracy of the total absorption was significantly different between the different rank coals using the same prediction method in Kailuan coalfield. For three methods, the prediction results using IAST were much similar to the practical data. The prediction accuracy of the mixed gas using IAST depends on coal characteristics and its Langmuir isotherm adsorption constants (pressure and volume). The prediction results of the moderate-rank coal were better than that of the lowrank coal. Due to the relatively higher deviation (as high as 49.22%) of the prediction resultsfor the low-rank coal (the No. 11 from the Linnancang Mine), the isothermal adsorption experiments on CH4/CO2 mixed gas needs to be done for the more accurate data.
出处 《中国矿业大学学报》 EI CAS CSCD 北大核心 2009年第3期351-356,共6页 Journal of China University of Mining & Technology
基金 欧盟第六框架的计划项目 国家重点基础研究发展规划(973)项目(2006CB202201)
关键词 开滦矿区 等温吸附 二元气体 预测 误差分析 Kailuan coalfield adsorption isotherm binary-component gas prediction deviation analysis
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参考文献13

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