When CO2/H2 and CO2/H2/toluene as the reactant passed through the iron catalyst bed respectively, the CO2 conversion and hydrocarbon product distribution were essentially the same with methane and olefins as the main products, indicating that the iron catalyst could catalyze the CO2 hydrogenation reaction, and does not work for the alkylation of toluene reaction (Fig. ). When CO2/H2 as the reactant passed through the Fe|3Z5 catalyst bed, the CO2 conversion remained at around 27% with the C1-C6 paraffins and C7-C10 aromatics as the dominant products, indicating that the light olefins generated over the Fe based catalyst would undergo oligomerization and aromatization reaction over Z5 catalyst . By contrast, when CO2/H2/toluene as the reactant passed through the Fe|3Z5 catalyst bed, the selectivity of jet fuel component (C8-C16) increased to 67.7%, while the selectivity of C1-C7 hydrocarbons decreased significantly, suggesting that the light olefins generated over the Fe-based catalysts would preferentially undergo alkylation with toluene forming the aromatic component in jet fuel .