A method for separating CO2 from a gas stream comprised of CO2 and other gaseous constituents using a zeolite sorbent in a swing-adsorption process, producing a high temperature CO2 stream at a higher CO2 pressure than the input gas stream. The method utilizes CO2 desorption in a CO2 atmosphere and effectively integrates heat transfers for optimizes overall efficiency. H2O adsorption does not preclude effective operation of the sorbent. The cycle may be incorporated in an IGCC for efficient pre-combustion CO2 capture. A particular application operates on shifted syngas at a temperature exceeding 200° C. and produces a dry CO2 stream at low temperature and high CO2 pressure, greatly reducing any compression energy requirements which may be subsequently required.