We addressed the development of novel catalyst supports membrane with penetration microchannels of ∼1–3.5 μm using wet-etched aluminum.

We used membrane for flow-through catalyst and investigated activity of catalyst with methanol steam-reforming.

We confirmed whether reactions occur in the ∼1–3.5 μm membrane microchannels.

We evaluated the performance of this membrane compared with alumina granular.

We present that there is no diffusive resistance at all temperatures because the membrane microchannel diffusive length is short.