乙酸乙酯废水催化氧化工艺及宏观反应动力学研究  

Study on apparent kinetics and reaction processes of catalytic oxidation of wastewater from ethyl acetate production

作　　者：周洋 蒲霄 崔咪芬[1] 刘清[1] 陈献[1] 费兆阳[2] 汤吉海[1,2] 张竹修 乔旭[1,2] ZHOU Yang;PU Xiao;CUI Mi-fen;LIU Qing;CHEN Xian;FEI Zhao-yang;TANG Ji-hai;ZHANG Zhu-xiu;QIAO Xu(College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China;State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学化工学院,江苏南京210009 [2]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《高校化学工程学报》2020年第1期157-162,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家重点研发项目(2017YFC0210903,2017YFB0307304);国家自然科学基金(21606130,21306089);材料化学工程国家重点实验室项目(ZK201610);江苏高校优势学科建设工程项目(PAPD);2016年度省第五期“333工程”资助科研项目

摘　　要：乙酸乙酯生产过程中产生大量高浓度有机废水,研究提出将乙酸乙酯废水先汽化,然后在自制复合氧化物催化剂上,在固定床反应器中进行催化氧化净化处理的方法,研究了其反应工艺,并在消除催化剂外扩散影响的前提下,在反应温度为290~410℃,氧气浓度为j=4%下,测定了乙酸乙酯废水催化氧化宏观反应动力学数据,建立了以耗氧速率为变量的宏观反应动力学模型,并拟合得到了动力学模型参数,计算得到的宏观反应活化能为50.17 kJ·mol^-1,模型计算值和实验值吻合较好。表明该模型是显著可信的,可为乙酸乙酯废水催化氧化工业反应器的设计提供参考依据。Ethyl acetate production usually comes with a large amount of high concentration organic wastewater.This study proposed a method for treating ethyl acetate wastewater by vaporization followed with catalytic oxidation in a fixed-bed reactor using a self-made composite oxide catalyst.The reaction process was optimized and the apparent reaction kinetic data were obtained at 290~410℃ and j=4% oxygen concentration after eliminating the effects of catalyst external diffusion.The apparent reaction kinetic model based on oxygen consumption rate was established and its parameters were obtained via data fitting.The calculated apparent activation energy was 50.17 kJ·mol^-1.The calculated results were in agreement with the experimental data,and the model was verified with good accuracy.This study provides guidelines for the design of industrial catalytic oxidation reactors.

关 键 词：乙酸乙酯废水 催化氧化 动力学 耗氧速率 

分 类 号：O643[理学—物理化学]