Abstract
Several trials were performed for the catalytic fixation of carbon dioxide by using hydrogen as well as methane as reductants in order to convert into useful chemicals, such as oxygenates and hydrocarbons and synthesis gas, respectively. As trials for the alleviation of chemical equilibrium limit in the CO 2 hydrogenation into methanol, the hybridized catalysts such as H-zeolites and K-doped Fe/L catalysts were prepared by mixing with the methanol catalyst, Cu/ZnO/Al 2O 3. And the formation of oxygenated compounds and hydrocarbons, and the formation of methylformate were confirmed with the enhanced CO 2 conversions, respectively. Another trial was the Fischer-Tropsch reaction approach to synthesize hydrocarbons directly with CO 2/H 2 over iron-based bimetallic catalysts. FeCo bimetallic catalysts showed over 60% CO 2 conversion. Finally, carbon dioxide reforming with methane was investigated over pentasil zeolite-supported nickel catalyst, which gave near equilibrium conversion of CO 2 and also near equilibrium yield on synthesis gas with high stability. And pentasil zeolite gave the superiority as a support, and alkaline promoters also attributed to have high dispersion and stability of nickel species.
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