Catalytic CO₂/H₂ Methanation Reaction over Alumina Supported Manganese/Cerium Oxide Based Catalysts

Abstract:

The methanation reaction is a promising method for the purification of natural gas, in which the acid gases of CO_2, is eliminated by catalytic conversion. The advantage of catalytic technology is the utilization of CO₂ present in the production of methane gas. The used of alumina supported cerium oxide as the based catalyst in CO₂/H₂ methanation reaction have been investigated in this research by using manganese as the dopant and ruthenium as the co-dopant via wet impregnation technique. The series of cerium oxide catalysts were calcined at 400 °C for 5 hours had been prepared at the screening stage. Then, the catalysts were optimized by different calcination temperatures and different based oxide loadings. The potential catalysts of Ru/Mn/Ce (5:35:60)/Al₂O₃ calcined at 700 °C gave 100 % of CO₂ conversion by using FTIR and yielded about 24 % of CH₄ respectively at reaction temperature of 400 °C. X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM) showed that the supported catalysts were amorphous in structure. FESEM analysis illustrated the surface of the catalysts were covered with small and dispersed spherical particles. EDX analysis revealed that there was 1.02 % reduction of Ru in the Ru/Mn/Ce (5:35:60)/Al₂O₃ used catalysts compared to fresh catalysts. Meanwhile NA analysis showed that Ru/Mn/Ce (5:35:60)/Al₂O₃ catalysts attained surface area of 143.10 m²/g respectively.

• Periodical: Advanced Materials Research (Volume 1107)
• Pages: 67-72
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1107.67
• Online since: June 2015
• Authors: Salmiah Jamal Mat Rosid, Wan Azelee Wan Abu Bakar*, Rusmidah Ali
• Keywords: Calcination Temperature, Cerium, Methanation, Morpholoy

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