Key words: carbon dioxide, reduction of CO2, reverse water gas shift reaction, Fe,Cr-containing catalysts
The reduction of carbon dioxide with molecular hydrogen in the presence of Fe,Cr-containing
catalysts supported on Sibunit carbon material at 400°C and pressures of 0,1
and 8,5 MPa was studied. Selective formation of carbon monoxide is possible over the
catalysts with the ratio Fe : Cr = 1—5. C1—C4 hydrocarbons with a predominance of
methane are formed along with CO at decreasing chromium content in the catalyst
(5Fe—0,25Cr/C sample). It was shown by transmission electron microscopy that the
main phase in 5Fe—5Cr/C catalyst is iron chromite FeCr2O4 (spinel structural type),
which prevents the reduction of iron and the formation of its carbides, which, in turn,
provide the formation of hydrocarbons upon the interaction of CO2 and H2.