制备条件对山梨醇氢解CuO-ZnO催化剂的影响  

Influence of preparation condition on the behaviours of CuO-ZnO sorbitol hydrogenolysis catalyst

作　　者：李仲良[1] 李小年[1] 

机构地区：[1]浙江工业大学资源与环境催化研究所绿色化学合成技术国家重点实验室培育基地,浙江杭州310032

出　　处：《工业催化》2006年第10期40-43,共4页Industrial Catalysis

基　　金：教育部新世纪优秀人才资助计划

摘　　要：研究了并流共沉淀法制备的CuO-ZnO催化剂在山梨醇催化氢解反应中的催化性能,考察了催化剂制备时不同沉淀温度和不同pH对催化剂性能的影响。采用XRD、H2-TPR和SEM等手段对催化剂及其前驱体的分散状态、还原性能和表面形貌进行了表征。结果表明,沉淀pH显著影响催化剂的分散程度和表面形貌,而沉淀温度则影响催化剂及其前驱体中CuO、ZnO的分散状态和分子组成形式;当pH=8.0和沉淀温度为70℃时,催化剂的活性最佳。CuO-ZnO catalyst for sorbitol hydrogenolysis were prepared by co-precipitation method. Influence of precipitation temperature and pH was investigated. Dispersion, reduction behavior and surface morphology of the catalyst and its precursor were characterized by XRD, H2-TPR and SEM. The results showed that the dispersion and surface morphology of the catalyst were remarkably influenced by precipitation pH, and dispersion of CuO and ZnO in the catalyst and its precursor and their molecular composition were affected by precipitation temperature. Optimum catalytic activity was attained at pH of 8.0 and precipitation temperature of 70 ℃.

关 键 词：山梨醇 CuO—ZnO催化剂 氢解 C4~C6多元醇 

分 类 号：TQ426.94[化学工程] TQ223.166