COMPOSITE MEMBRANE EXCELLENT IN PERMSELECTIVITY OF HYDROGEN AND ITS PRODUCTION

摘要

PURPOSE:To enhance H2 permselectivity of a membrane, by subjecting an inorganic porous membrane to vapor deposition treatment with Pd or Pd-Pt alloy and subjecting a (Pd(NH3)4)Cl2 soln. to evaculating and degassing treatment via the membrane and depositing Pd on the membrane. CONSTITUTION:An inorganic porous membrane such as Al2O3 is subjected to sputtering vapor deposition treatment with Pd or Pd-Pt alloy and the thickness of vapor deposition is regulated to 20-200Angstrom . Then the one surface of the inorganic porous membrane is brought into contact with a (Pd(NH3)4)Cl2 aq. soln. and this aq. soln. is vacuumized from the another surface and subjected to evacuating and degassing treatment and only water is evaporated and Pd is deposited on the inorganic porous membrane. The membrane obtained by such a way is excellent in permselectivity of H2 and separation efficiency of H2 is enhanced.