Abstract: A process for the generation of electricity and the production of a concentrated carbon dioxide stream using a molten carbonate fuel cell. Anode off-gas is at least partly fed to a catalytic afterburner wherein it is oxidized with an oxidant consisting of part of the cathode off-gas and/or part of a molecular oxygen containing external oxidant stream, which external oxidant stream has at most 20% (v/v) nitrogen. The oxidized anode off-gas is brought into heat exchange contact with the remainder of the cathode off-gas and the remainder of the external oxidant stream to obtain cooled anode off-gas and a heated mixture of cathode off-gas and external oxidant which are fed to the cathode chamber as the cathode inlet gas. As soon as a set point in the carbon dioxide concentration at the cathode chamber outlet is reached, part of the cooled anode off-gas is withdrawn from the process.

Abstract: A fuel cell is constructed as anode-supported solid oxide fuel cell, but can also be used with electrolyte- and metal-supported solid oxide fuel cells. The anode and electrolyte are larger than the cathode and the portion of the anode/electrolyte protruding beyond the cathode is provided with a peripheral seal. The anode-/electrolyte/cathode combination is provided with a flow/gas distribution grid on both the anode and the cathode side. The anode/cathode combination including the flow/gas distribution grids is enclosed between two separator plates, an auxiliary plate and a spacer. The auxiliary plate is designed for external feeding and discharge of a cathode gas, while the separator plate and the auxiliary plate are provided with openings for internal feeding/discharge of anode gas. The auxiliary plate and spacer are solder joined to the separator plate. Several fuel cells of the invention can be used to form a cell stack.

Abstract: Method for determining the utilization of a reactant at the anode side or cathode side of a fuel cell. To this end a low flow with high utilization is applied at the side to be measured and an appreciable flow with low utilization is applied at the other side. A table is compiled in which the relationship between the Nernst voltage under the outlet conditions, such as the temperature, and the utilization of the reactant to be measured is incorporated. Cell voltage is then measured at the outlet and is equated to the Nernst voltage. The utilization can be determined from the table. This method can be used for determination of the flow rate and the flow distribution in a stack of electrochemical cells.