Preparation of palladium membranes from the reaction of Pd(C3H3)(C5H5) with H-2: wet-impregnated deposition

A new technique to prepare a palladium membrane for high-temperature hydrog en permeation was developed: Pd(C3H3)(C5H5) an organometallic precursor rea cted with hydrogen at room temperature to decompose into Pd crystallites. T his reaction together with sintering treatment under hydrogen and nitrogen in sequence resulted in the formation of dense films of pure palladium on t he surface of the mesoporous stainless steel (SUS) support. Under H-2 atmos phere the palladium membrane could be sintered at 823 K to form a skin laye r inside the support pores. The hydrogen permeance was 5.16x10(-2) cm(3) cm (-2) cm Hg-1 s(-1) at 723 K. H-2/N-2 selectivity was 1600 at 723 K. (C) 199 9 Elsevier Science B.V. All rights reserved.