FCC废催化剂用于含胺污水臭氧催化氧化处理及其反应动力学研究

以FCC废催化剂作为臭氧催化氧化催化剂对含胺污水进行处理，考察臭氧浓度、FCC废催化剂添加量、污水pH、反应温度等因素对含胺污水化学需氧量（COD）降低效果的影响，并与工业常用臭氧催化氧化催化剂进行对比，分析采用FCC废催化剂时臭氧催化氧化有机胺反应动力学的影响因素，测定不同条件下的表观速率常数。结果显示：增大臭氧浓度和废催化剂添加量能快速降低污水COD；碱性条件会促进臭氧分解产生羟基自由基（.OH），提高氧化反应速率；适当升高反应温度有利于氧化反应的进行，但温度过高会降低臭氧溶解度；FCC废催化剂协同臭氧的催化氧化效果明显优于工业常用臭氧催化氧化催化剂。动力学分析表明，在不同pH、温度和废催化剂添加量下臭氧催化氧化含有机胺污水过程均符合表观一级反应动力学。

APPLICATION OF WASTE FCC CATALYST IN CATALYTIC OZONATION OF AMINE-CONTAINING WASTEWATER AND ITS KINETICS STUDY

The waste FCC catalyst was used as catalyst for catalytic ozonation of amine-containing wastewater. The effects of ozone concentration, waste FCC catalyst addition, wastewater initial pH value, and reaction temperature on the reduction efficiency of COD in amine-containing wastewater were investigated, and the catalytic oxidation effect of waste FCC catalyst was compared with conventional ozonation catalysts used in industry. The factors affecting the kinetics of the ozone catalytic oxidation of organic amines by waste FCC catalyst were analyzed, and the apparent reaction rate constants under different conditions were determined. The results show that increasing the ozone concentration and the amount of waste catalyst can accelerate the reduction rate of COD in wastewater; alkaline conditions will promote the decomposition of ozone to produce hydroxyl radicals (.OH) and speed up the oxidation reaction rate; the appropriate increase of the reaction temperature is beneficial to the oxidation reaction, but too high temperature will reduce the solubility of ozone; the synergistic catalytic oxidation effect of waste FCC catalyst is obviously better than conventional ozonation catalysts. The results of kinetic analysis show that ozone catalytic oxidation of wastewater containing amine at different pH, temperature and the amount of waste catalyst addition is consistent with the first-order reaction kinetics.