Predictions for Isothermal Adsorption of CH_4/CO_2 Binary Gas for the Late Paleozoic Coals from the Kailuan Coalfield of Hebei
DAI Shi-feng
ZHANG Bei-bei
ZENG Rong-shu
CHEN Hua-jie
SONG Xian-cun
ZHANG Li-li
Abstract：The total adsorbed amounts of CH_4/CO_2 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 low-rank coal. Due to the relatively higher deviation (as high as 49.22%) of the prediction results for the low-rank coal (the No. 11 from the Linnancang Mine), the isothermal adsorption exper-iments on CH_4/CO_2 mixed gas needs to be done for the more accurate data.
Keywords：Kailuan coalfieldadsorption isothermbinary-component gaspredictiondevia-tion analysis
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 351-356 )