Effect of preparation parameters on catalytic properties of Pt/graphite |
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Authors: | Liu Zhengqian Ma Jun and Zhao Lei |
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Institution: | (1) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China |
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Abstract: | Catalytic ozonation of aqueous solutions of oxalic acid was examined in the presence of graphite-supported platinum catalysts.
The catalytic activity of graphite was significantly enhanced by loading platinum. The removal efficiency of oxalic acid was
3.0%, 47.6% and 99.3% for ozonation alone, graphite catalytic ozonation and Pt/graphite catalytic ozonation in 30 min under
the experimental condition, respectively. The influence of support pretreatment, solvent, impregnation time, platinum loading
amount and reduction temperature on the activity of Pt/graphite catalyst was investigated. The pretreatment of graphite support
had no effect on activity improvement of Pt/graphite catalyst. Solvent and impregnation time also no great effect on the activity.
Platinum loading amount and reduction temperature influenced the catalyst activity significantly. The optimal catalytic performance
of Pt/graphite was obtained when 1.0% platinum loading and 623 K of reduction temperature was adopted. The Pt/graphite catalyst
was used for five times with no significant decrease in its activity and more than 90% oxalic acid removal was obtained.
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Translated from Environmental Science, 2007, 28(6): 1258–1263 译自: 环境科学] |
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Keywords: | catalytic ozonation Pt/graphite catalyst oxalic acid degradation |
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