Abstract: A methanation assembly for use with a water supply and a gas supply containing gas to be methanated in which a reactor assembly has a plurality of methanation reactors each for methanating gas input to the assembly and a gas delivery and cooling assembly adapted to deliver gas from the gas supply to each of said methanation reactors and to combine water from the water supply with the output of each methanation reactor being conveyed to a next methanation reactor and carry the mixture to such next methanation reactor.

Abstract: A fuel processing system and method for processing fuel for a fuel cell having a first adsorbent bed for adsorption of high molecular weight organic sulfur-containing compounds and inorganic sulfur-containing compounds, and a second adsorbent bed for adsorption of low molecular weight organic sulfur-containing compounds, where the adsorbent beds are arranged such that the fuel to be processed passes through one of the adsorbent beds and, thereafter through the other adsorbent bed.

Abstract: A fuel cell system having a fuel cell with an anode compartment and a cathode compartment. The fuel cell system is also provided with a partial-pressure pressure swing adsorption assembly operating at low pressure which uses supply gas for the cathode compartment of the fuel cell to separate carbon dioxide from the anode exhaust gas exiting from the anode compartment of the fuel cell. The partial-pressure pressure swing adsorption assembly is adapted to carry out this separation based on the difference in partial pressures of the carbon dioxide in the anode exhaust gas and the oxidant gas in the supply gas. The fuel cell system utilizes a further unit to recycle the exhaust gas, after separation of the carbon dioxide, to the anode compartment and to feed the supply gas with the carbon dioxide to the cathode compartment.

Abstract: A fuel cell system having a fuel cell with an anode compartment and a cathode compartment. The fuel cell system is also provided with a partial-pressure pressure swing adsorption assembly operating at low pressure which uses supply gas for the cathode compartment of the fuel cell to separate carbon dioxide from the anode exhaust gas exiting from the anode compartment of the fuel cell. The partial-pressure pressure swing adsorption assembly is adapted to carry out this separation based on the difference in partial pressures of the carbon dioxide in the anode exhaust gas and the oxidant gas in the supply gas. The fuel cell system utilizes a further unit to recycle the exhaust gas, after separation of the carbon dioxide, to the anode compartment and to feed the supply gas with the carbon dioxide to the cathode compartment.