Operating process for a fuel cell stack has first reformer producing excess hydrogen endothermically and second cooled reformer processing the excess exothermically

摘要

An operating process for a fuel cell stack (1) comprises partly converting fuel gas into hydrogen in an internal reformer (4) in thermal contact with the fuel cells (2) in an endothermic reaction receiving heat from the cells. More hydrogen than needed by the cells for sending to the anodes is formed, the excess being sent to a second reformer (3) where an exothermic reaction occurs and the heat liberated is removed by cooling. An independent claim is also included for a fuel cell arrangement as above.