TNT在超临界水中的氧化反应动力学  

Oxidation Reaction Kinetics of TNT in Supercritical Water

作　　者：常双君[1] 刘玉存[1] 董国庆 于国强[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]晋西工业集团公司,山西太原030027

出　　处：《火炸药学报》2010年第1期53-56,共4页Chinese Journal of Explosives & Propellants

基　　金：山西省自然科学基金资助项目(2007011034)

摘　　要：利用超临界水氧化（SCWO）实验装置，氧气为氧化剂，对废水中的TNT在超临界水中的氧化反应进行了研究，用幂函数法则建立TCOD去除率宏观动力学方程。结果表明，SCWO技术可有效消除废水中的TNT，随着反应温度的升高和停留时间的延长，TNT模拟废水的COD去除率显著增大。在温度为673-823K、压力24MPa、300％过氧量、TNT浓度为5．7×10^-4mol／L的实验条件下，有机物的反应级数为1．18，活化能Ea为96．85kJ／mol，指前因子A为4．87×10^3s^-1。The supercritical water oxidation （SCWO） experimental facility was used to investigate the degradation rules of TNT in wastewater with O2 as oxidant. The global kinetic equation for COD removal rate was established by using a power-law. The results show that SCWO technology can eliminate TNT from wastewater effectively. On the supercritical condition, the COD removal rate of TNT improved obviously as reaction temperature and residence time rising. Under the condition of 673-823K,24MPa,300% excess oxygen,5. 7×10^-4mol · L^-1,the reaction can proceed in 1.18 order with organics and 0.24 order with oxygen. The activation energy is 96.85kJ · mol^-1 with the Arrhenius pre-exponential factor being 4.87 × 10^3 s^-1.

关 键 词：物理化学 超临界水氧化 TNT废水 动力学 

分 类 号：O646.5[理学—物理化学] TQ564[理学—化学]