关键词: 机械研磨燃烧法, Cu/ZnO/Al₂O₃催化剂, 一氧化碳加氢, 甲醇

Abstract: Cu/ZnO/Al₂O₃ catalysts were prepared by mechanical milling and combustion at different calcination temperatures and were tested for the synthesis of methanol from CO hydrogenation.Calcination of catalyst precursors was monitored with thermogravimetry differential scanning calorimeter(TG-DSC).These catalysts were characterized by X-ray diffraction(XRD),scanning electronic microscope(SEM),N₂ adsorption,temperature-programmed reduction with H₂(TPR) and N₂O oxidation followed by H₂ titration.The results showed that the physicochemical properties of the prepared catalysts depended strongly on calcination temperature,and BET surface area and dispersion of copper species decreased with increasing calcination temperature.The catalyst calcined at 350℃ exhibited the highest activity and stable catalytic performance.The method could be a promising alternative for the preparation of highly efficient Cu/ZnO/Al₂O₃ catalysts.

Key words: mechanical milling and combustion method, Cu/ZnO/Al₂O₃ catalysts, CO hydrogenation, methanol