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Preparation of a novel Pd/layered double hydroxide composite membrane for hydrogen filtration and characterization by thermal cycling

By Yen-Hsun Chi, Jun-Yen Uan, Meng-Chang Lin, Yu-Li Lin and Jin-Hua Huang


A layered double hydroxide (LDH) layer was grown directly on a porous stainless steel (PSS)surface to reduce the pore opening of the PSS and to be a middle layer retarding Pd/Feinterdiffusion. A thin Pd film (w7.85 mm) was plated on the modified PSS tube by an electrolessplating method. A helium leak test proved that the thin Pd on the LDH-modified PSSsubstrate was free of defects. The membrane had a H2 flux of 28e36 m3/(m2 h) and H2/Heselectivity larger than 2000 at a pressure difference of 1 bar. Thermal cycling between roomtemperature and 673 K was performed and showed that the membrane exhibited goodpermeance and selectivity. Long-term evaluation (1500 h) of the membrane at 673 Kshowed static results of H2 flux (w30 m3/(m2 h)) and H2/He selectivity (w2000) over the1500 h test period

Topics: Pd membrane, Porous stainless steel, Electroless plating, Layered double hydroxide, Hydrogen
Year: 2014
DOI identifier: 10.1016/j.ijhydene.2013.08.052
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