A high surface area K-promoted bulk Fe-catalyst is prepared without using structural stabilizers or other heteroatoms.
The catalyst is active in CO2 hydrogenation to C2–C4 olefins at 300 °C and 5 barg.
The catalyst is more active than materials based on commercial α-Fe2O3 and Fe3O4.
CO is the primary product of CO2 hydrogenation and acts as intermediate.
3 types of active sites exist, each one responsible for a different functionality.