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The wet H2-rich gas was used as reducing gas instead of the H2/N2 gas in the reduction step of the catalyst preparation. It is found that the selectivity for CO methanation over the catalysts 0.4Ni/ZrO2 so-obtained was decreased in comparison to the case of the H2/N2 gas used as reducing gas. Even though, the samples with the different feed atomic ratios of Ni/Zr prepared by the impregnation method...
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