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Cu/γ-Al 2 O 3 catalysts for methanol synthesis from CO 2 are prepared and modified by metal oxides via impregnation in the present work. Results indicate that promoters modification leads to the formation of small Cu 0 particles with a high dispersion, improves catalytic performance of Cu-based catalysts in methanol synthesis. Moreover, the activation temperature is...
To study the influence of the circulation distribution principle to the centrifugal pump, the present paper studied the pump head character, efficiency character and NPSH character of the pump under three circulation distribution laws. And 2D-design method is adopted. The rules how the circulation distribution influences the performance of centrifugal pump is obtained through the research.
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