Studies on Oxidative Dehydrogenation of Propane over Cesium Salts of 12-tunstophosphoric Acid and Hydroxylation of Benzene to Phenol over Cu-zeolite Catalysts with Molecular Oxygen
摘要 本学位论文首先利用稀溶液沉淀法制备了不同铯取代量的12-磷钨杂多酸铯盐(CsxH3-xPW12O40，x=0.9-3.0)系列催化剂，并研究了该系列催化剂在丙烷氧化脱氢反应中催化性能的变化规律。从XRD、FT-IR、低温N2吸脱附、SEM、H2-TPR和NH3-TPD表征结果可见，随着CsxH3-xPW12O40系列样品中铯含量的增加，样品中酸中心浓度逐渐降低，而且样品的微观形貌从具有平整紧实表面的块状固体(CsxH3-xPW12O40，x2.2)。关联CsxH3-xPW12O40(x=0.9-3.0)系列催化剂的催化活性与其物理化学性质后发现，CsxH3-xPW12O40系列催化...Abstract This dissertation first studied the oxidative dehydrogenation of propane over Cs salts of Keggin-type CsxH3-xPW12O40 which were synthesized by precipitation between dilute aqueous solutions of H3PW12O40 and Cs2CO3. From XRD, IR, N2-adsorption, SEM, H2-TPR and NH3-TPD characterizations, it is clear that along the increase in Cs content of CsxH3-xPW12O40 samples, the concentration of aci...学位：理学硕士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：2052006115200
