分子筛固载双金属Fenton催化剂的制备及其反应性能

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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。 The Fe-Cu-Y heterogeneous Fenton catalyst was prepared by ion exchange method using Fe2 + and Cu2 + supported on NaY zeolite. The catalytic oxidation of phenol with different Fe / Cu molar ratios was compared. The results showed that when the catalyst molar ratio of Fe / Cu was 2.40, the catalytic reaction rate was the fastest, the phenol degradation rate was 99.07% after 2 hours reaction, and the catalyst was stable and recyclable. In the catalyst calcination temperature test, it was found by BET, SEM, XRD characterization and activity measurement that increasing the calcination temperature decreased the specific surface area of ​​the catalyst and decreased the catalytic activity. The calcination at 700 ℃ also resulted in the sintering of the catalyst. The heterogeneous Fenton system of phenol degradation reaction within 60 min in line with quasi-1 reaction kinetics, the apparent activation energy of 47.56 kJ / mol.
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