Petrographic and Geochemical Controls on Methane Genesis, Pore Fractal Attributes, and Sorption of Lower Gondwana Coal of Jharia Basin, India.

19 , 25 , 54 , 62 The sorption time (τ, days) showed a positive trend with the depth of coal samples ( Figure 8 g, R 2 = 0.49), validating the above results that deeper coal seams have better gas diffusion characteristics controlled by local geology and do not have an impact on gas recovery.

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The GSL displays a negative trend with increasing depth ( Figure 8 c) of coal seams, specifying that accumulation of gas is influenced by restructural and igneous intrusive activities in the basin. 25 , 35 , 56 , 57 Figure 8 d presents the direct relationship of ash content with total gas content ( R 2 = 0.47), specifying the inorg

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