Hydrogen recovery from methylcyclohexane as a chemical hydrogen carrier using a palladium membrane reactor

A Pd membrane has been prepared by electroless plating on the surface of a porous TiO₂ tube in this work. The mean thickness of the resulting Pd membrane on the modified tube was 13 µm. The hydrogen permeation flux was as high as 0.16 mol m^?2 s^?1 with a pressure difference of 108.75 Pa at 648 K. H₂ permeances were 1.6 × 10^?7–6.4 × 10^?7/molm^?2 s^?1 Pa^?1/at 580–650 K. The separation factor of H₂/N₂ was over 1,000. Measurements of the temperature coefficient for hydrogen permeation through the membrane gave a value of 9.49 kJ mol^?1 in good agreement with previous reports. The results showed that the prepared membranes can be used in membrane reactors for H₂ permeation in the dehydrogenation of methylcyclohexane.