Platinum - Cobalt- loaded NaY zeolite ( Pt - Co/ NaY) membranes were synthesized for continuous, single- step nonoxidative conversion of methane to higher hydrocarbons ( C2+) and hydrogen. During isothermal operation at 300 degrees C, CH4. owed on the feed side of the membrane whilst H-2. owed through the sweep side of the membrane. The C2+ products formed continuously on the H-2 sweep side. The results indicate that the Pt - Co/ NaY catalytic membrane can overcome the two-step limitation for nonoxidative CH4 conversion.