分子筛固载双金属Fenton催化剂的制备及其反应性能  

PREPARATION OF BIMETALLIC FENTON CATALYST SUPPORTED ON ZEOLITE AND ITS REACTION EFFICIENCY

作　　者：陈娴[1] 叶招莲[1] 李蔚[1] 陆金[1] 徐银慧[1] 

机构地区：[1]江苏技术师范学院化学与环境工程学院,江苏常州213001

出　　处：《水处理技术》2013年第2期65-68,共4页Technology of Water Treatment

基　　金：国家自然科学基金项目(51108211)

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。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.

关 键 词：非均相Fenton反应 双金属催化剂 苯酚 

分 类 号：TQ031.7[化学工程] X783[环境科学与工程—环境工程]