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- W2801354998 abstract "It is attempted to optimize preparation of ZrO2 as support of the nickel catalysts for selective methanation of CO in H2-rich gas (CO-SMET). Therefore, the supports ZrO2 were prepared at first by thermal decomposition method from zirconium oxynitrate and zirconium oxychloride at the calcination temperature of 400 °C and 800 °C, respectively. It is illustrated that the salt kind and calcination temperature affected phase state (tetragonal, monoclinic), crystallite size and specific surface area (SSA) of the supports. The difference in property of the supports influenced catalytic performance of the catalysts Ni/ZrO2 for CO-SMET reaction. Especially, the chlorine ion residues in the support ZrO2 prepared from zirconium oxychloride was beneficial for CO removal selectively. Furthermore, a precipitation method was adopted to prepare ZrO2 for comparison with the thermal decomposition method with use of the zirconium oxychloride as starting material. It is found that the supports ZrO2 prepared by the precipitation method induced a better dispersion of metallic Ni on its surface. The catalyst Ni/ZrO2 with use of the support ZrO2 prepared by the precipitation method and calcination at 400 °C exhibited a good performance at the reaction temperature of 220 °C in the 100 h durability test, where CO outlet concentration was kept below 10 ppm and the selectivity remained constant at 100%. Relation of Ni crystallite size and chlorine ion residues with the catalytic performance was discussed." @default.
- W2801354998 created "2018-05-17" @default.
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- W2801354998 date "2018-05-01" @default.
- W2801354998 modified "2023-10-11" @default.
- W2801354998 title "Influence of the supports ZrO 2 on selective methanation of CO over the nickel supported catalysts" @default.
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- W2801354998 doi "https://doi.org/10.1016/j.ijhydene.2018.03.185" @default.
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