A study on platinum doped nickel oxide based catalysts for hydrogenation of carbon dioxide
In order to reduce excessive greenhouse effect as to prevent global warming, it is desired to decrease the amount of the most important anthropogenic greenhouse gas, that is, carbon dioxide (CO2) in the atmosphere. Sabatier process is capable of utilizing CO2 in huge amount by producing methane from...
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| Format: | Learning Object |
| Language: | English |
| Published: |
Universiti Malaysia Perlis
2012
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| Online Access: | http://dspace.unimap.edu.my/xmlui/handle/123456789/20625 |
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| Summary: | In order to reduce excessive greenhouse effect as to prevent global warming, it is desired to decrease the amount of the most important anthropogenic greenhouse gas, that is, carbon dioxide (CO2) in the atmosphere. Sabatier process is capable of utilizing CO2 in huge amount by producing methane from CO2 hydrogenation. In this project, series of platinum doped nickel oxide catalysts were synthesized. Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) characterizations were performed. The catalytic activities of the catalysts in CO2 hydrogenation were studied using a fixed-bed catalytic reactor. XRD analysis revealed that the crystallinity and mean crystallite size of the distinct phases (NiO and Pt) increased progressively with increasing calcination temperature. SEM analysis revealed that the particle shape became more defined cubical and the particle size of the catalysts increased progressively as the calcination temperature increased. Catalytic testing shown that Pt/NiO catalyst of atomic ratio 1:0.1, calcined at 600°C for 3 hours has the best catalytic activity. Pt/NiO catalyst with lower Pt loading had shown better catalytic activity in the reaction in which an 89.05% of CH4 yield was observed at reaction temperature of 400°C. |
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