| The preparation processes of Ni-Ru bimetallic active component catalysts are studied and some factors that influence the activity of the catalysts are researched in this dissertation. The goal is to improve the reforming performance of the traditional Ni-metal catalysts through the modification of active components, so as to reduce the preparation cost, improve the rate and efficiency for producing hydrogen.A series of supported Ni, Ru and Ni-Ru bimetallic active component catalysts have been prepared by the wetness impregnation and their catalytic performances for methane steam reforming at three different temperatures have been studied. It is confirmed that the fittest calcination temperature for the alumina-calcium aluminate carrier should be 1150℃. The Ni and Ru catalysts supported on the former carrier have excellent activity for methane steam reforming. The activity of Ru catalysts is higher than Ni catalysts under lower temperatures. Also, it is confirmed that the best impregnation sequence is firstly Ni, then Ru. Forthermore, the loading contents of Ni and Ru for Ni-Ru bimetallic catalysts have been optimized, and it is found that the optimized catalyst has excellent activity. On the basis of above researches, the promotion of La and Cu on the activity of Ni-Ru bimetallic catalysts has been investigated. It is found that the suitable addition of La or Cu could increase the activity of the former catalyst. The results of characterization on La-Ni-Ru and Cu-Ni-Ru catalysts indicated that the two catalysts possess the suitable surface area, suitable pore size distribution, therefore, are applicable to the hydrocarbon steam reforming. Moreover, the fittest calcination temperature and reductive temperature for Ni-Ru bimetallic catalysts are confirmed. Finally, the Cu-Ni-Ru catalyst with active components is prepared at the optimized methods and conditions. The process conditions for hydrocarbon steam reforming are studied using the optimized catalyst.
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