| 초록 |
Hydrogenative direct conversion of CO2 to hydrocarbons by the combination of CuAl2O4 and iron oxide as reverse water-gas shift (RWGS) and Fischer-Tropsch (FT) catalyst, respectively, was investigated by supporting iron oxide on CuAl2O4 (i.e., Fe/CuAl2O4). This integrated catalyst enabled the direct conversion of CO2 to large molecular weight hydrocarbons, which might occur via consecutive pathways of RWGS (CO2 to CO) and FT (CO to hydrocarbons). The loading of iron oxide and the effect of alkali promoter have been investigated in this reaction. The higher the loading of iron oxide, the higher the CO2 conversion and C2+ hydrocarbon selectivity. The introduction of potassium into Fe/CuAl2O4 catalyst significantly promoted selectivity for long-chained hydrocarbons in the range of C5 ~ C12 with high selectivity, and the CH4 formation was suppressed at the same time. Depending on the composition of bifunctional spinel oxide catalysts, the C2+ hydrocarbon yield can increase up to 41.9%. |
