Abstract: Method and power plant comprising a Solid Oxide Fuel Cell (SOFC) for production of electrical energy and H2 gas. The power plant is charged with a feed gas selected from the group consisting of natural gas, bio-gas and syngas. The feed gas, prior to being fed to the SOFC, is reformed in a reformer with a CaO containing CO2 absorber, thereby producing a carbon free H2 gas as feed for the SOFC while converting CaO to CaCO3. The latter is regenerated to CaO in an endothermic reaction in a CaO regenerator at a temperature of at least 850° C. utilizing heat from the SOFC to heat the regenerator. A heat exchange medium collects heat in the SOFC and is subjected to further temperature increase in a heating device before being subjected to heat exchange in the CaO regenerator.

Abstract: Method and device for biogas upgrading and hydrogen production from anaerobic fermentation of biological material under production of energy rich gases selected among methane and hydrogen or a combination thereof. The method comprises addition of hydrogen gas to a fermentation step to enhance the methane: CO2 ratio in the raw biogas produced. At least part of the raw biogas is subjected to a step of sorption enhanced reforming without prior separation of CO2, using CaO as an absorbent to capture CO2 from the raw biogas as well as CO2 released in the reforming reaction. CaO is regenerated in an endothermic reaction using heat at least partially provided, directly or indirectly, by the bio-gas to be upgraded, thereby producing substantially pure hydrogen and substantially pure CO2.