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C02/H2 methanation on nickel oxide based catalyst doped with various elements for the purification of natural gas

Buang, Nor Aziah and Wan Abu Bakar, Wan Azelee and Mohd. Marsin, Faridah and Razali, Mohd. Hasmizam (2008) C02/H2 methanation on nickel oxide based catalyst doped with various elements for the purification of natural gas. The Malaysian Journal of Analytical Sciences, 12 (1). 217 - 223. ISSN 1394-2506

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Official URL: http://www.ukm.my/mjas/v12_n1/30.pdf

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 CO2 elimination in the presence of H2 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 CO2 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 CH4 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 CO2 to CH4 . Single point BET analysis showed that Ni/Co/Pr did not have any changes in the surface area, as it did not adsorb CO2 . This statement is in agreement with the XRD and EDX results obtained whereby there are no traces of carbon deposition. From TPD results showed CO2 desorption peaks at low and high temperature indicated intermediate bonding of CO2 on the surface of the catalyst. This shows the presence of dopant will result in the enhancement of CO2 elimination to a 100%.

Item Type:Article
Uncontrolled Keywords:nickel based catalyst, cobalt, CO2 elimination, methanation
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:18874
Deposited By: Kamariah Mohamed Jong
Deposited On:19 Nov 2012 03:42
Last Modified:19 Nov 2012 06:19

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