Sequestration of C02 in coal Seams: a few thoughts

Abstract

With global targets of the decrease of greenhouse gas emissions, attention has turned to the capture and storage of carbondioxide in geological media. Proposals for C 0 2 storage have included plans to sequester C0₂ in deep, unminable coals seams, with the possibility for enhanced coal bed methane recovery. However, the extent to which coal can adsorb C0₂ is affected by a number of factors. The nature of the coal will determine the maximum adsorption capacity under a given set of conditions, but the sequestra­tion environment will determine the extent to which thatultim ate capacity will be realized. The effect of both physical and chemical changes need to be understood. Parameters such as tem perature, pressure, and pH might be expected to have a moder­ate to large influence.