Co 2 / H 2 Methanation on Nickel Oxide Based Catalyst Doped With Various Elements for the Purification

  • Buang N
  • Wan W
  • Bakar A
 et al. 
  • 36

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Abstract

Nickel possess characteristics similar to noble metals, apart from being easily deactivated by carbon deposition and poisoning. In this study, the activity of prepared nickel based catalysts doped with selected elements (Mg, Zr, Mo, Mn, Co, Fe, and Cu) that were presumed to help nickel active sites has been investigated for the CO 2 elimination in the presence of H 2 in the hopes for a methanation reaction. With the addition of lanthanide series as co-dopant in the catalyst, the synthesized catalysts were tested for its catalytic activity and reproducibility by FTIR spectroscopy. It was found that only several elements can boost CO 2 elimination, namely magnesium, cobalt and ferum, with cobalt showing the highest conversion for both ratios, Ni/Co/Pr 60:30:10 and 60:10:30. Furthermore, Ni/Co/Pr with the ratio of 60:30:10 was proven superior as it yielded highest CH 4 in the lowest conversion temperature of approximately 350 °C. Further characterization on Ni/Co/Pr with the ratio of 60:30:10 showed the supremacy towards the conversion of CO 2 to CH 4 . Single point BET analysis showed that Ni/Co/Pr did not have any changes in the surface area, as it did not adsorb CO 2 . This statement is in agreement with the XRD and EDX results obtained whereby there are no traces of carbon deposition. From TPD results showed CO 2 desorption peaks at low and high temperature indicated intermediate bonding of CO 2 on the surface of the catalyst. This shows the presence of dopant will result in the enhancement of CO 2 elimination to a 100%.

Author-supplied keywords

  • CO 2 elimination
  • co 2 elimination
  • cobalt
  • methanation
  • nickel based catalyst

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Authors

  • Nor Aziah Buang

  • Wan Azelee Wan

  • Abu Bakar

  • Faridah Mohd Marsin

  • Hasmizam Razali

  • Wan Azelee

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