Citation:
LI Tao, WANG Sheng, GAO Dian-nan, WANG Shu-dong. Effect of support calcination temperature on the catalytic properties of Ru/Ce0.8Zr0.2O2 for methanation of carbon dioxide[J]. Journal of Fuel Chemistry and Technology,
;2014, 42(12): 1440-1446.
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A series of Ru/Ce0.8Zr0.2O2 catalysts were prepared by the impregnation method with Ce0.8Zr0.2O2 homoprecipitated and calcined at different temperatures as supports. The supports and the catalysts were characterized with TG-DSC, BET and H2-TPR techniques. It was shown that the Ce0.8Zr0.2O2 calcined at 500 ℃ formed Ce-Zr solid solution and had a proper surface area and pore opening and a weak interaction with Ru species, leading to a significant increase in the catalytic activity. A suitable reduction methods promoted distribution of active species. The Ru/Ce0.8Zr0.2O2 prepared with the Ce0.8Zr0.2O2 calcined at 500 ℃ showed high activity after calcination at 400 ℃ and successive reduction with H2N·NH2·H2O and H2. It gave a H2 conversion of 93.57%, approaching to the equilibrium value under the conditions of 290 ℃, 0.1 MPa, 10 000 h-1 and H2/CO2 mol ratio of 3.5.
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Keywords:
- Ru/Ce0.8Zr0.2O2,
- calcination temperature,
- CO2,
- methanation,
- supported catalyst
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