深部煤层对CO2地质处置机制及应用前景

CO2是重要的温室气体之一,CO2的有效处置对减缓全球变暖具有重大意义。由于煤介质具有特殊的双重孔隙结构、吸附性强等物性特征,对CO2具有很强的吸附能力,且大于煤介质吸附CH4的能力,因此,可将CO2注入深部不可开采煤层储存,在长久处置CO2的同时亦可促进深部煤层气的开采。在我国,深部不可开采煤层处置CO2显示了巨大的潜力,可以处置26-46年的CO2排放量,尤其在华北煤炭能源基地具有良好的应用前景。

MECHANISM AND APPLICATION POTENTIAL OF GEOLOGICAL SEQUESTRATION OF CARBON DIOXIDE IN DEEP COAL SEAMS

CO2 is one of the most important greenhouse gases.As a matter of fact,geological sequestration of CO2 is considered to be fairly significant to reduce CO2 emission and decrease global warming.Due to its special dual porosity and adsorption,coal has huge adsorption capacity for CO2.Further,it is clarified that CO2 adsorption is more efficient than CH4 adsorption of coals.Thus,CO2 can be sequestrated in the deep unminable coal seams which enhance coalbed methane(ECBM) production of the deep unminable coal seams synchronously.As the potential technique to reduce greenhouse effect,geological sequestration of CO2 in deep unminable coal seams is competent for storage of CO2 released during the forthcoming 26 to 46 years in China,especially in those coal energy bases in North China.