Abstract
Abstract The problems connected with the sorption capacity of methane in hard coals are constantly subject to various research. In this paper, the influence of the content of macerals mainly vitrinite for the sorption capacity of chosen samples of Polish hard coals was analysed. The analysis was conducted on basis of available from the literature results of resarches of petrographic composition of this coals and methane sorption isotherms. The samples of grained coals contained from 7 ro 76% of vitrinite and their sorption capacity was obtained in the scope of high pressures; 0 < p < 80 bars, on the basis of the equation of Langmuire. In effect, it turned out that the maceral content has a little influence on the methane sorption capacity of coals. This refers mainly to high volatile and middle volatile coals. In the literature concerning this issue simillar effect may be encountered for other coals.
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