CO2 hydrogenation on Fe-based catalysts doped with potassium in gas phase and under supercritical conditions

New catalysts FeK/Sibunit and FeCuK/Sibunit were prepared and applied for the CO₂ hydrogenation in the temperature range of 250–400°C and under the pressures of 1, 20 and 85atm. The reverse water gas shift reaction prevailed under the atmospheric pressure (i.e., CO₂ was selectively converted into CO), while the formation of C₁–C₁₂ hydrocarbons occurred under the increased pressures. The Cu-containing catalyst exhibited the higher activity and selectivity towards C₁–C₁₂ hydrocarbons.