Canadian Journal of Pure & Applied Sciences

Abstract: The Thar Coalfield is located in the Sindh Province of South East Pakistan some 400km east of Karachi. It is world’s largest coalfield which is now being studied from Coalbed Methane resources point of view. Thar coal was deposited in Domain to Mountain/Bara Formation of Paleocene to early Eocene age. The pore diameter in coal helps tounderstand the formation Coalbed Methane. The studies conducted for Thar coalfield shows that coal has dual porosity, as some coal seams have nearly micropores or meso-pores, while other seams possess meso pore, on the basis of pore micropore, pore volume is also determined that shows that the samples from Thar coalfield pore volume vary between 0.06 and 2.36 cc/g. For the determination of adsorption capacity of methane, surface area of pores in coal is also calculated which shows that investigated coal has low values of surface area in coal. The investigation shows that, the Thar coal has smaller size of pore, therefore metane will diffuse in these pores, and based on surface area results it shows that the Thar coal has low adsorption capacity.