However, CO2 sequestration technology is a promising method to develop CBM in depth.As we know, CO2 has a higher adsorbability than CH4.If CO2 is injected into coal seam, CH4 can be replaced by CO2.

• CO2的吸附能力是CH4的4倍以上，如果把CO2通过钻井注入到深部煤层中，由于其吸附能力的差异，CH4会被优先置换出来，利用该技术一方面实现封存CO2的目的，同时还能够开发深部CH4。