(ZA9809201-A)   NOVELTY - The stable composite material includes a gas-tight ceramic having a composition exhibiting both ionic and electronic conductivity and good oxygen permeability for conversion of lower hydrocarbons to high value products.    USE - For use in conversion of methane and lower molecular weight alkanes into synthetic fuels of chemicals.    ADVANTAGE - The composite membrane exhibits improved stability when exposed to reducing atmosphere and other operating conditions for extended time periods.    (US5935533-A)   NOVELTY - The stable composite material includes a gas-tight ceramic having a composition exhibiting both ionic and electronic conductivity and good oxygen permeability for conversion of lower hydrocarbons to high value products.    USE - For use in conversion of methane and lower molecular weight alkanes into synthetic fuels of chemicals.    ADVANTAGE - The composite membrane exhibits improved stability when exposed to reducing atmosphere and other operating conditions for extended time periods.    (EP975415-A1)   NOVELTY - The stable composite material includes a gas-tight ceramic having a composition exhibiting both ionic and electronic conductivity and good oxygen permeability for conversion of lower hydrocarbons to high value products.    USE - For use in conversion of methane and lower molecular weight alkanes into synthetic fuels of chemicals.    ADVANTAGE - The composite membrane exhibits improved stability when exposed to reducing atmosphere and other operating conditions for extended time periods.    (CN1242715-A)   NOVELTY - The stable composite material includes a gas-tight ceramic having a composition exhibiting both ionic and electronic conductivity and good oxygen permeability for conversion of lower hydrocarbons to high value products.    USE - For use in conversion of methane and lower molecular weight alkanes into synthetic fuels of chemicals.    ADVANTAGE - The composite membrane exhibits improved stability when exposed to reducing atmosphere and other operating conditions for extended time periods.    (TW396148-A)   NOVELTY - The stable composite material includes a gas-tight ceramic having a composition exhibiting both ionic and electronic conductivity and good oxygen permeability for conversion of lower hydrocarbons to high value products.    USE - For use in conversion of methane and lower molecular weight alkanes into synthetic fuels of chemicals.    ADVANTAGE - The composite membrane exhibits improved stability when exposed to reducing atmosphere and other operating conditions for extended time periods.