METHOD AND APPARATUS FOR SEQUESTERING CO2 GAS AND RELEASING NATURAL GAS FROM COAL AND GAS SHALE FORMATIONS

摘要

A system for sequestering CO₂ gas and releasing natural gas from underground coal and/or gas shale formations using CO₂ gas captured from the flue gas of a coal burning power plant, and processing it to produce cold liquid pressurized CO₂, and injecting the cold liquid CO₂ under pressure to create fractures within the formation and causing the CO₂ to be adsorbed into the coal or gas shale and CH₄ to be desorbed, released and recovered.