Effect of Ni/Co Ratio on Bimetallic Oxide Supported Silica Catalyst in CO₂ Methanation

Abstract:

Five series of silica supported bimetallic oxide (NiCo/SiO₂) catalysts have been synthesized through successive reverse co-precipitation and wet impregnation methods at different metal loadings (i.e. 80Ni20Co/SiO_2,, 60Ni40Co/SiO_2, 50Ni50Co/SiO_2, 40Ni60Co/SiO_2, 20Ni80Co/SiO₂). The catalytic performance of these catalysts were tested for the CO₂ methanation catalysis using microactivity fixed bed reactor. Nickel rich catalyst (80Ni20Co/SiO₂) exhibited the highest catalytic activity in the CO₂ methanation with 47.1% of CO₂ conversion. Meanwhile, the CH₄ selectivity and yield was found to be at 99.9% and 27%, respectively.

• Periodical: Applied Mechanics and Materials (Volume 802)
• Pages: 431-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.802.431
• Online since: October 2015
• Authors: Siti Aminah Md Ali, Ku Halim Ku Hamid, Kamariah Noor Ismail
• Keywords: CH4 Selectivity, CO₂ Conversion, CO₂ Methanation, NiCo/SiO₂

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