Abstract
Most methanation reactions used basic catalysts to achieve high CO2 conversions. Therefore, in this study, praseodymium oxide was selected and synthesized using ratio Ru/Mn/Pr (5:30:65) and Al2O3 as support. From the result, it successfully converted 96 % of CO2 gas at calcination temperature of 800 °C using one series reactor. When the praseodymium-based loading is varied, the trend CO2 conversion is higher at 65 %wt and slightly decreased when increased to 85 wt%. Then, two series furnace reactors were applied and the Ru/Mn/Pr (5:30:65)/Al2O3 catalyst exhibited a slightly increased CO2 conversion with 98 %. According to X-ray diffraction analysis, the catalyst is amorphous with the presence of active species MnO2 and Pr2O3. In contrast, FESEM analysis showed that the catalyst surface was covered with large crystalline solids of irregular size which align with amorphous structure. Electron dispersive X-ray analysis shows the presence of all active element. Meanwhile, surface area of catalyst is 59.22 m2/g from Nitrogen analysis.
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