Abstract
Abstract Filament-like ZnO and rod-like ZnO were synthesized by hydrothermal method, and used as a component in CuO/ZnO catalysts. These catalysts were tested in hydrogenation of CO 2 to CH 3 OH and compared with the CuO/ZnO catalyst prepared via conventional coprecipitation process. It was found that the activities of these catalysts depended strongly on the morphology of ZnO. CuO/ZnO catalyst prepared with filament-like ZnO exhibited the best activity, the space time yield of methanol reached 0.55 g -MeOH /(g -cat h) with a 78.2% selectivity of methanol at H 2 /CO 2 = 3, 240 °C, 3.0 MPa and 0.54 mol/(g -cat h). Characterizations found that CuO/ZnO catalyst with filament-like ZnO exhibited stronger interaction between ZnO and Cu, and more oxygen vacancies. The performances of these catalysts for CO 2 hydrogenation were compared and discussed with their structure.
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