conditions including catalyst employed were the same as those in Table A) Conventional Membrane Reactor Reactor ______________________________________ CH.sub.4 conv. (%) 18.4 22.9 O.sub.2 conv. (%) .apprxeq.100 .apprxeq.100 CO sel. (mol %) t 10.5 H.sub.2 sel. (mol %) 24.0 55.0 CO yield (mol %) t 2.3 H.sub.2 yield (mol %) 4.4 13.8 H.sub.2 /CO mole ratio -- 11.9 _____________________________________