连续式超临界水氧化装置处理苯酚溶液的试验研究

利用自建的一套连续式装置，在高于水的临界点的温度和压力（６７３～８７３Ｋ，２６～３５ＭＰａ）下，以氧气为氧化剂对苯酚溶液进行氧化处理，对苯酚的超临界水氧化进行了试验研究。结果表明，在氧气过量的条件下，停留时间是影响苯酚在超临界水中氧化分解的主要因素。提高反应温度和压力能增加苯酚的去除率，只要有足够的氧气，增加苯酚初始浓度对苯酚转化率的影响就不明显。在试验条件下，溶液中苯酚的去除动力学对苯酚是一级，对氧气是零级。

EXPERIMENTAL STUDY ON PHENOL OXIDATION IN SUPERCRITICAL WATER

A continuous now reactor for the oxidative decomposition of organic compound in supercritical water was established. Aqueous solutions of phenol were oxidized at 673~873 K and 26~35 MPa. The experimental results show that retention period under the condition of excess oxygen is the main factor affecting the decomposition of phenol. Increasing temperature or pressure results in high removal efficiency. The increase of phenol concentration has no effect on the decomposition rate of phenol. The kinetics of phenol removal by supercritical water oxidation(SCWO) is studied in the established apparatus under the experimental temperature and pressure taking oxygen as an oxidant. The oxidation reaction is first-order for phenol and zero order for oxygen.