State-of-the-art of supported metal membranes for gas separation

An extensive review of current research on supported metal membranes, espec ially for hydrogen separation is presented. Membrane material, methods for fabrication of thin metal layers on porous substrate and gas transport mech anisms through different types of membranes are summarized followed by a di scussion of problems with supported metal membranes. Further developments i n this research field are expected to the application for membrane reactor system as one of the environmentally-friendly chemical processes.