连续式超临界水氧化装置处理苯酚溶液的动力学讨论  

KINETICS OF PHENOL OXIDATION IN SUPERCRITICAL WATER

作　　者：鞠美庭[1] 冯成武[1] 

机构地区：[1]石油大学炼制系,山东东营257062

出　　处：《水处理技术》2000年第2期105-109,共5页Technology of Water Treatment

基　　金：中国石油天然气总公司"九五"重点科技项目

摘　　要：本文利用自建的一套连续式装置进行了苯酚的超临界水氧化研究。在高于水的临界点的温度和压力 (5 73～ 873 ,2 5～ 35 MPa)下 ,用氧气作为氧化剂对苯酚溶液进行氧化处理。对影响苯酚分解转化率的各种因素如停留时间、温度、压力、氧化剂浓度及苯酚初始浓度等进行了条件实验 ,研究了超临界水氧化处理苯酚时的去除动力学。在实验条件下 ,溶液中苯酚的去除动力学对苯酚是一级、氧气是零级 ;其速率常数与温度的关系符合 Arrhenius公式 ;压力也明显影响速率常数 。The continuous flow reactor for the oxidative decomosition of organic compound in supercritical water was established. Aqueous solutions of phenol were oxidized at 673-873 and 28-35MPa. The results showed that residence time and excess oxygen are the main factors which affect the decomposition of phenol. The increasing of the temperature or pressure will result in the higher removal efficiency and the increase of concentration of phenol will not affect the decomposition rate of phenol. The kinetics of the phenol removal by supercritical water oxidation (SCWO) was studied in the apparatus at the experimental temperature and pressure with oxygen as the oxidant. The global raet law of phenol are first order in phenol and zero order in oxygen. The relation between the global rate constant and temperature could be satisfactorily described by Arrhenius Law. The increment of pressure could obviously enlarge the global constant. The activation volume of the reaction is not a constant.

关 键 词：超临界 水氧化 动力学 苯酚溶液 废水处理 

分 类 号：X783.03[环境科学与工程—环境工程]