Cryogenic method for H2 and CH4 recovery from a rich CO2 stream in pre-combustion carbon capture and storage schemes

► An efficient purification step before CO2 compression of pre-combustion CCS. ► The cryogenic system includes a flash separation or a distillation column. ► Evaluation of the effect it has on pre-combustion CCS systems' efficiency. ► The modeling study in AspenPlus™ with sensitivity on operating parameters.