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Title: Gas phase fractionation method using porous ceramic membrane

Flaw-free porous ceramic membranes fabricated from metal sols and coated onto a porous support are advantageously used in gas phase fractionation methods. Mean pore diameters of less than 40 .ANG., preferably 5-20 .ANG. and most preferably about 15 .ANG., are permeable at lower pressures than existing membranes. Condensation of gases in small pores and non-Knudsen membrane transport mechanisms are employed to facilitate and increase membrane permeability and permselectivity.
 [1];  [1];  [1]
  1. (Madison, WI)
Issue Date:
OSTI Identifier:
Wisconsin Alumni Research Foundation (Madison, WI) OSTI
Patent Number(s):
US 5487774
Contract Number:
Country of Publication:
United States
gas; phase; fractionation; method; porous; ceramic; membrane; flaw-free; membranes; fabricated; metal; sols; coated; support; advantageously; methods; mean; pore; diameters; 40; ang; preferably; 5-20; 15; permeable; pressures; existing; condensation; gases; pores; non-knudsen; transport; mechanisms; employed; facilitate; increase; permeability; permselectivity; transport mechanism; ceramic membranes; gas phase; ceramic membrane; porous support; porous ceramic; mean pore; pore diameters; pore diameter; phase fractionation; /95/96/