Abstract:

A high-performance Pd membrane for H₂ separation was prepared by the modified electroless plating method.In order to obtain pure H2 for fuel cell use,the NH3 cracker was integrated with a Pd membrane-based purifier and the permeation performance of Pd membrane (H₂ flux, recovery yield and purity)was investigated at 510℃ and a pressure range from 0.1 MPa to 0.5 MPa.High separation efficiency was achieved with such an intergrated system.A 75 cm³·cm^-2·min^-1H₂ flow with purity as high as 99.93% could be obtained.Throughout a 120 h stability test, the H₂ flux and recovery yield were maintained at 63 cm³·cm^-2·min^-1and 85% respectively.