中文摘要：

采用不同分子量的聚乙二醇（400、600、800和1 000）作为浆态床反应介质,工业甲醇合成催化剂C302作为催化剂进行一氧化碳加氢反应,运用XRD、H_2-TPR、NH_3-TPD-MS、BET、XPS等方法对催化剂进行表征,考察催化剂C302在不同浆态床反应介质中进行一氧化碳加氢反应后其结构及性能的变化.结果表明浆态床反应介质对催化剂性能的发挥具有显著的影响,以聚乙二醇作为浆态床反应介质,C302用于一氧化碳加氢反应时产物中均出现了乙醇,同时催化剂表现出良好的稳定性.其中以聚乙二醇600作为浆态床反应介质时,反应后催化剂C302中Cu晶粒尺寸降低,存在两种形态的Cu2O且两者数量匹配,同时其弱酸中心增多,表面Zn富集,这些为催化剂高选择性合成乙醇提供了适宜结构,活性评价显示乙醇选择性达到25.21%.

英文摘要：

Polyethylene glycol（ PEG） with different molecular weight（ 400,600,800 and 1 000） was used as reaction medium. CO hydrogenation reaction was carried out over the industrial methanol synthesis catalyst C302 in slurry reactor. The catalysts were characterized by powder X-ray diffraction（ XRD）,H_2temperature-programmed reduction（ H_2-TPR）,temperature-programmed desorption of ammonia（ NH_3-TPD）,N2 adsorption and X-ray photoelectron spectroscopy. The effect of reaction medium on catalyst structure and performance was investigated. Results showed that the slurry bed reaction medium had a significant effect on the catalytic performances. When PEG was adopted as the slurry bed reaction medium,ethanol was an unexpected product over the C302 catalyst,which exhibited the outstanding stability. Using PEG600 as reaction medium,Cu average grain size reduced after reaction and there were two forms of Cu_2 O with the favorable ratio. What＇s more,the weak acid sites increased and the Zn was enriched on the surface,which provided suitable structure for high ethanol selectivity. The activity tests showed that ethanol selectivity reached up to 25. 21%.