超临界水中乙酸氧化的研究进展  

Acetic acid oxidation in supercritical water

作　　者：潘志彦[1] 俞尚清[1] 周红艺[1] 林春绵[1] 

机构地区：[1]浙江工业大学环境工程系,杭州310032

出　　处：《现代化工》2002年第12期14-17,共4页Modern Chemical Industry

基　　金：国家自然科学基金资助项目 (2 96770 1 5)

摘　　要：超临界水氧化技术是一种快速彻底降解废水中有机物质的新型处理技术。在超临界水氧化有机物中 ,乙酸被认为是一种中间产物 ,乙酸氧化是反应速率的控制步骤 ,其氧化动力学的研究对反应器设计具有重要意义。大部分研究都集中在动力学参数和反应条件如温度、压力、密度和停留时间上。最近的研究发现加入二氧化锰等催化剂 ,可缓和反应温度、压力条件 ,以达到高效节能的目的。综述了目前在超临界水氧化乙酸动力学方面的研究进展。对连续平推流或间歇反应器中实验数据用幂指数曲线拟合得到的动力学方程表明 。The supercritical water oxidation (SCWO) is an innovative technology for fast,complete and efficient destruction of organics in wastewater.Acetic acid is identified as a refractory or rate-control byproduct of the complex organic compound's oxidation in supercritical water.In order to design or improve existing reactors,the oxidation kinetics of a given oxidation reaction must be well studied.Most researchers focused on kinetic parameters and reaction conditions including temperature,pressure,density,and residence time.Recently there has been increasing attention to heterogeneous catalysts,e.g.manganese dioxide,in SCWO to lower the process temperature and pressure and thereby reduce the processing cost.Latest advances in the research of oxidation kinetics are reviewed.Most researchers fit experimental data by power exponent curve on the basis of plug-flow or batch reactors.The results show that the oxidation kinetics of acetic acid is a first-order reaction equation.

关 键 词：超临界水 乙酸 氧化 研究进展 动力学 有机废水处理 

分 类 号：X783[环境科学与工程—环境工程] X703.1