| 초록 |
The study of the conversion of CO2 to other materials (e.g., CO, CH3OH, CH4, hydrocarbon) has been attracting great interest to many scientists. In this study, we carried out the CO2 hydrogenation in the presence of H2 using mesoporous bimetallic aluminum spinel oxide (i.e., ZnAl2O4, CuAl2O4, CoAl2O4, MgAl2O4) as heterogeneous catalysts. Most catalysts produced CO as the major product (> 80%). We carried out the reaction at 300 – 400 oC for each catalyst, and as a result, CuAl2O4 showed the highest CO2 conversion. Correlating with the CO2-TPD profiles of all catalysts, the relationship shows that the larger the amount of the strong basic site, the higher the CO2 conversion. We suggested that the sufficiently strong basic sites could bind CO2 efficiently. In addition, due to the high surface area of the mesopores of the catalysts, the catalyst has high catalytic activity. We obtained the activation energies of all catalysts through the Arrhenius plot. The results demonstrated that CuAl2O4 presented the lowest activation energy. |
