| It is important to explore a suitable catalyst to remove CO from raformate gas in order to stimulate the application of hydrogen produced by reforming of liquid hydrocarbon in PEMFC. In this thesis, supported gold catalysts were prepared and applied in the CO selective oxidation in H2-rich gas. The catalysts were characterized by BET, XRD, TG-DTA and XPS. The results are as following:A series of Au/MOx)M=Fe, Co, Zr, Zr-Ce) catalysts were prepared by deposition-precipitation (DP) method and their performance in CO selective oxidation in H2-rich gas were compared to find that Au/Fe2O3 was the best catalyst, which can remove CO from H2-rich gas effectively at temperature of less than 100℃.The influence of preparation condition of Au/Fe2O3 on its physio- chemical properties and catalytic performance in CO selective oxidation in H2-rich gas was systematically investigated. It was found that the performance of Au/Fe2O3 prepared by deposition-precipitation (DP) was better than that prepared by co-precipitation or impregnation. And the catalyst prepared by DP with a solution whose pH was 6.3-8.5 showed the best performance. The dispersion of Au can be increased with suitable Au loading, calcination temperature and manners. But the addition of La2O3 seemed can not improve the catalytic performance.The influence of pre-treatment of catalyst and the reactant flow rate on catalytic performance in CO selective oxidation in H2-rich gas was also investigated. Au/Fe2O3 reduced in H2 flow other than calcinated in air at 300℃did not show significant activity. The best flow rate was determined to be 30-40ml/min when 0.5g catalyst was loaded.The stability of Au/Fe2O3 prepared in this thesis was quite good. Its performance at 60℃was almost kept unchanged during the experimental 70h with 1.5wt% Au/Fe2O3 calcinated at 300℃.
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