METHOD FOR PREPARING STANDBY GAS FOR A FUEL CELL ARRANGEMENT

摘要

The invention relates to a method for preparing standby gas for a fuel cell arrangement, and to a corresponding fuel cell arrangement. According to the invention, a combustible gas is mixed with air or another oxygen-containing gas to form a first mixture and is guided through a catalyst device (7, 8). The standby gas is obtained by transforming the oxygen part of the first gas mixture into carbon dioxide and water vapour and by transforming constituents of water vapour and higher hydrocarbons contained in the gas mixture into methane and hydrogen. Preferably, the combustible gas is mixed (5) with air or another oxygen-containing gas to form a first mixture and is guided through a first catalyst (7) at a pre-determined first temperature, a second gas mixture being obtained by transforming the oxygen part of the first gas mixture into carbon dioxide and water vapour. Said second gas mixture is guided through a second catalyst (8) at a pre-determined second temperature, the standby gas being obtained by transforming constituents of water vapour and higher hydrocarbons contained in the gas mixture into methane and hydrogen.