ASYMMETRIC PD-AG STAINLESS-STEEL CATALYTIC MEMBRANES FOR METHANE STEAM REFORMING

Pd-Ag/porous stainless steel asymmetric membranes were prepared by suc cessive palladium and silver platings in electroless hydrazine baths, followed by a thermal treatment in hydrogen of the as-deposited membra nes above the Tamman temperatures for the alloy formation. The prepare d membranes were permselective toward hydrogen separation. A membrane reactor made of stainless steel was designed to perform methane steam reforming. At mild reaction conditions, methane conversion is signific antly enhanced by partial removal of nydrogen from the reaction locati on as a result of diffusion through the Pd-based membrane. These effec ts were examined under a variety of experimental conditions.