焦化脱硫废液中POPs的SCWO实验及动力学研究  

SCWO purification kinetics of POPs from coking desulphurizing wastewater

作　　者：程诚[1] 王黎[1] 

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《应用化工》2016年第11期2047-2051,共5页Applied Chemical Industry

基　　金：国家科技支撑计划(2012BAC02B04)

摘　　要：采用连续超临界水氧化（ SCWO ）工业化中试装置，对某工业焦化脱硫废液中代表性的主要5种持久性有机污染物（喹啉、吲哚、吡啶、萘和联苯）进行了超临界状态下（ P＝28 MPa，T＝380～530℃）的动力学研究。以COD为表征，研究5种POPs的去除率，建立了SCWO宏观动力学方程并确定相关动力学参数。结果表明，超临界状态下，当O2过量，停留时间为30～90 s时，5种POPs的去除率随着反应温度的升高和停留时间的延长而增加，去除率均在83．98％～99．46％之间，反应活化能 Ea 介于28．588～42．667 kJ／mol 之间，频率因子 k0介于11．278～86．403 s－1之间，反应级数a介于0．93443～1．09409，表明污染物分子结构影响降解效率。The degradative effect and reaction dynamics of the 5 Persistent Organic Pollutants （ POPs ） were conducted in purification of coking-desulphurizing wastewater under the supercritical condition of 28 MPa and 380-530 ℃by using SCWO pilot facility .The purification effect of quinoline ,benzpyrole, pyridine ,naphthaline and biphenyl were analyzed .Taking COD as the index the removal effect of the 5 POPs were researched ,and the macro kinetics equation of SCWO were stablished and the reaction kinetic parameters were determined .The results were shown that ,the removal rate of the 5 POPs increase with the increase of the reaction temperature and the extension of time in the supercritical conditions .Under the excess oxygen and the residence time 30-90 s, the removal rates of the 5 POPs are 83 .98% -99.46%,respectively.The activation energy are 28.588 -42.667 kJ/mol, the frequency factor are 11.278-86.403 s-1,and the reaction order are 0.934 43-1.094 09,which proves that the SCWO effects related to molecular structure of the POPs compounds .

关 键 词：焦化脱硫废液 持久性有机污染物 反应动力学 

分 类 号：TQ031.7[化学工程]