杂多酸盐催化剂用于催化氧化有机废水的反应动力学研究

Study on Reaction Kinetics of Heteropolyacid Salt Catalysts for Catalytic Oxidation of Organic Wastewater

通过催化湿式氧化法处理煤气化废水,并且选用Cu-HPW/TiO_(2)-ZrO_(2)催化剂、Cu-HPMo/TiO_(2)-ZrO_(2)催化剂以及Cu-HsiW/TiO_(2)-ZrO_(2)催化剂进行了研究,比较了不同反应体系在相同反应条件下COD去除率随温度的变化情况。针对这三种反应体系,分别建立了反应动力学模型,结果表明均符合两阶段一级反应动力学模型。此外,分别对各反应体系的活化能和反应速率常数进行比较,得出各种催化剂活性由高到低的顺序是:Cu-HPW/TiO_(2)-ZrO_(2)>Cu-HPMo/TiO_(2)-ZrO_(2)>Cu-HsiW/TiO_(2)-ZrO_(2)。

The catalytic wet oxidation process was used to treat coal gasification wastewater,Cu-HPW/TiO_(2)-ZrO_(2) catalyst,Cu-HPMo/TiO_(2)-ZrO_(2) catalyst and Cu-HsiW/TiO_(2)-ZrO_(2) catalyst were used in this study,and the different reaction systems were compared in COD removal rate with temperature under the same reaction conditions.For these three reaction systems,a reaction kinetic model was established respectively.The results showed that they were in line with the two-stage first-order reaction kinetic model.In addition,the activation energy and reaction rate constant of each reaction system were compared,and the order of the activity of each catalyst was as follows:Cu-HPW/TiO_(2)-ZrO_(2)>Cu-HPMo/TiO_(2)-ZrO_(2)>Cu-HsiW/TiO_(2)-ZrO_(2).