Economic assessment of CO2 sequestration in coal seams

This paper reports on the cost and environmental load analysis of CO2 sequestration systems in coal scams. Two types of injection gas were considered, CO2 and flue gas. For the CO2 injection, the system is composed of combustion of natural gas and/or coal in a power station, CO2 separation from flue gas, CO2 injection into a coal seam, CH4 production by the CO2 replacement in the coal seam and CH4 Supply for power generation. For the flue gas injection, produced CH4 with N-2 is separated after production from a well. To estimate the amount of CO2 sequestration and CH4 production, Enhanced CBM Recovery Simulator (ECOMERS) is under developing. The environmental load of this system was evaluated by LCA.