【摘要】 采用离子交换法,将Fe2+和Cu2+负载在NaY分子筛上,制备了Fe-Cu-Y非均相Fenton催化剂。比较了具有不同Fe/Cu摩尔比的催化剂对苯酚的催化氧化性能。结果显示,当催化剂的Fe/Cu摩尔比为2.40时,其催化反应速率最快,反应2 h后苯酚降解率达99.07%,并且该催化剂稳定性较高,可循环使用。在催化剂的焙烧温度试验中,通过BET、SEM、XRD表征及活性测定发现,提高焙烧温度使得催化剂比表面积减小、催化活性降低,700℃焙烧还会造成催化剂的烧结。该非均相Fenton体系对苯酚的降解反应在60 min内符合准1级反应动力学,其表观活化能为47.56 kJ/mol。更多还原

【Abstract】 One kind of heterogeneous Fenton catalyst,named as Fe-Cu-Y,was prepared with Fe2+ and Cu2+ supported on NaY zeolite by ion-exchanged method.The efficiency of catalysts with different Fe/Cu molar ratios were compared on catalytic oxidation of phenol.Result showed that the phenol removal reached 99.07% after 2 h reaction time catalyzed by the catalyst with 2.40 Fe/Cu molar ratio,which had the quickest reaction rate,and could be reused with preferable stability.The catalysts calcinated at different temperatures were characterized by means of BET,SEM,XRD and activity determining.It demonstrated that a decrease in the specific surface area and catalytic activity was obtained at higher calcination temperature.Moreover,catalyst could be sintered at 700 ℃.The kinetics of phenol degradation in the system of heterogeneous Fenton reaction were well-fitted to a pseudo-first-order model within 60 min,and the apparent activation energy was 47.56 kJ/mol.更多还原