Influence of CO2 and H2O on the separation of hydrogen over two types of Pd membranes: Thin metal membrane and pore-filling-type membrane

▸ Influence of CO2 and H2O on the permeation of H2 over Pd membrane was investigated. ▸ Thin metal Pd membrane and pore-filling type Pd membrane were prepared. ▸ Pore-filling type Pd membrane showed the high tolerance for mixing of CO2 and H2O. ▸ Significant influence of CO2 was observed over thin metal Pd membrane at 573 K. ▸ Surface adsorbed species by the reaction of CO2 and H2 inhibited the H2 permeation.