EVOLUTION OF FUEL CELLS POWERED BY

The development of the process and electrochemical materials for conversion of H2S in a fuel cell to co-generate electrical power and benign products is out-lined. While the thermodynamic basis for the process was clear, it was neces-sary to perform extensive research into the development of materials as cata-lysts and electrolytes, and to determine the optimal process and operating con-ditions. Through the use of composite anode catalysts and compatible new protonic electrolytes that are both chemically and thermally stable in the opera-ting environment, we have achieved good and sustainable power densities. The only products are power, elemental sulfur and steam. Key words: hydrogen sulfide; fuel cell; anode catalyst; electrolyte; ca-thode catalyst. Each year large amounts of H2S are generated worldwide, mostly as by-products from petroleum, natu-ral gas and coal gasification industries. The adverse effects of H2S on industrial processes, human healt