文章摘要
王帅,崔洪友,谭洪梓.常低压湿空气催化氧化氯乙酸降解机理[J].精细化工,2021,38(7):
常低压湿空气催化氧化氯乙酸降解机理
Catalytic Wet Air Oxidation Degradation Mechanism of Chloroacetic Acid under Low Pressure
投稿时间:2021-01-02  修订日期:2021-03-10
DOI:
中文关键词: 无机熔盐水合物  氯乙酸  湿空气催化氧化  降解机理
英文关键词: Inorganic Molten Salt Hydrate  Chloroacetic Acid  Catalytic Wet Air Oxidation  Degradation Mechanism
基金项目:淄博市校城融合计划项目
作者单位E-mail
王帅 山东理工大学 961439749@qq.com 
崔洪友 山东理工大学 cuihy@sdut.edu.cn 
谭洪梓 山东理工大学 hztan@sdut.edu.cn 
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中文摘要:
      利用无机熔盐水合物的温升效应,研究了氯乙酸废水在常低压下湿空气催化氧化降解效果,分别考察了催化剂种类、反应温度、反应时间对氯乙酸和COD去除率的影响,并对反应机理进行了初步探讨。研究表明,在CaCl2·2H2O熔盐水合物中CuCl2对氯乙酸的降解效果最佳,温和压力条件下氯乙酸去除率可达95%,COD去除率可达90%。自由基抑制实验和中间产物分析发现,在羟基自由基的协同催化下,氯乙酸依次降解为羟基乙酸、二羟基乙酸、甲酸、CO2和水。
英文摘要:
      Taking advantage of the temperature-increasing effect of inorganic molten salt hydrates, catalytic wet air oxidation of chloroacetic acid (CAA) wastewater under low pressures was conducted. The effects of catalyst type, reaction temperature and reaction time on the removal of CAA and COD were investigated. It was found that CuCl2 has the highest catalytic performance in dihydrate of CaCl2 among the tested catalysts. The removal rates of CAA and COD can reach up to 95% and 90% respectively. The free radical inhibition experiments and intermediate products analysis revealed that the catalytic oxidation mechanism is that CAA degrades to glycolic acid, formic acid and finally to CO2 and water in turns under the synergistic catalysis of hydroxyl free radicals that is generated by the interaction of oxygen with the catalyst cycle of Cu(Ⅱ)-Cu(Ⅰ)-Cu(Ⅱ).
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