Technologies such as direct electrification and use of clean hydrogen could play a role in defossilizing energy sector and chemical industries. Anyway, for some specific areas, like maritime or aviation transport or carbon based chemical intermediates production, it will be necessary to replace fossil molecules by renewable ones. Reverse water gas shift (RWGS), consisting in a catalytic hydrogenation of highly stable CO2 molecule into a more common CO rich syngas , is a key for a retrofit of various fossil based infrastructure. Indeed, such syngas is used in chemical industry for about a century to synthesize chemicals and fuels.
Anyway, RWGS being an endothermal equilibrated reaction favoured at high temperature, the thermal management of the reaction is still an issue, particularly the heat input to the reactor, which in this context should be efficient and from a decarbonized source.