Abstract
Hydrogenation of carbon dioxide was studied by rare earth compound catalysts, hybrid catalysts and Fe-Cu catalysts in order to convert carbon dioxide to fuel. Methanation of carbon dioxide was carried out by using rare earth metal alloys at 200-400° under 1-5MPa. The order of activity was LaNi5»LaNi4Cr>Ni>LaNi4Al. Methane was obtained in high yield (93%) and in rapid reaction (STY = 890 mol/l.h). It was observed that LaNi5 changed to metallic Ni and amorphous La2O3 during reaction from XRD analysis. Next, hydrocarbons (C1 to C5) were obtained in 16% by using hydrid catalyst composed of Cu-Zn-Cr and zeolite HY at 400° via methanol. Longer hydrocarbons (C1∼C8) were also obtained in 43% yield by using Fe-Cu catalyst at 400° under 5MPa.
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