Cu–Al–Zn/Magnetite Nanoparticle Composite Catalysts for Steam Reforming of MeOH by Magnetic Induction

We explore the use of a mechanical mixture comprising a commercial Cu–Al–Zn catalyst (CZA, HiFuel W220) and 160 nm magnetite nanoparticles as a susceptor for methanol steam reforming powered by induction heating. By the generation of heat locally near catalytic sites, this approach reduces thermal transfer limitations typically encountered in externally heated systems. The optimized mixture achieved 46% methanol conversion at 150 °C under induction heating compared to the 225 °C required for similar performance using conventional oven heating. The stability and performance of the mixture were assessed under both inert and reactive conditions. A solid-state reaction between the catalyst and magnetite was observed during inert gas heating, but this was effectively suppressed under the reducing methanol reforming stream. Durability tests showed stable activity with no significant copper sintering or performance loss over a period of 3 h. Magnetite-mediated localized heating enabled an efficient reaction while maintaining a low overall bed temperature. This work demonstrates the potential of catalyst–susceptor integration to enhance thermal efficiency in heterogeneous catalysis. The findings highlight design strategies for applying induction heating to catalytic systems, offering improved energy utilization and operational control for gas-phase reactions.