Injections of carbon dioxide (CO2) into unmineable coalbeds can both enhance coalbed methane recovery (ECBM), a high-efficiency energy, and realize underground storage of CO2. In these processes, the diffusion and sorption of methane (CH4) and carbon dioxide are key dominant processes. In this...

Impurities such as N2 and O2 can be co-injected with CO2 to cut the overall cost of carbon capture and geological storage by lowering the CO2 capture cost. However, only few field-scale studies have focused on the effect of these impurities, such as N2 and O2, with low solubility and a low...