New Discovery on Supercritical CO2-H2O Treated Coal： Pore Structure and Methane Adsorption

Nowadays, the governments and worldwide energy and environmental scientists have been focusing on CO2 enhanced coalbed methane recovery （CO2-ECBM） to reduce greenhouse gas emissions and to increment coalbed methane production. Previous researches have confirmed that CO2 can react with minerals in coal seams to transform the permeability of coal. However, few studies have paid attention to the influence of the reaction of CO2 with minerals on the pore distribution and methane adsorption of coals.