Thermolysis of hydrogen sulfide in a metalmembrane reactor

The effect of H2S on the performance of Pd and Pd/Au composite membrane

“…Kulprathipanja et al [8] reported the failure of a 4 m Pd/ceramic composite membrane with the loss of selectivity upon exposing to a 115 ppm H 2 S in a 50% H 2 -N 2 mixture within 2 h at 450 • C with the formation of numerous pinholes. Edlund and Pledger [9] observed a rapid failure (within seconds) of the Pd/SiO 2 /V composite membrane by a catastrophic rupture with the formation of pinholes and large cracks upon exposure to pure H 2 S at 115 psia and 700 • C. Kajiwara et al [10] also observed the rupture and cracks formation of the Pd/porous alumina composite membranes after exposure to a 6200 ppm H 2 S/H 2 mixture at 400 • C within 1 h, resulting in the membrane losing its ability to separate H 2 from other gases.…”