超临界水氧化法降解废水中的对叔丁基邻苯二酚  

Supercritical water oxidation for p-tert-butylcatechol degradation in wastewater

作　　者：闫泽[1] 张敏卿[1] 韩优[1] 张金利[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工程》2016年第5期70-74,78,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21576205)

摘　　要：为了高效处理废水中的对叔丁基邻苯二酚,采用超临界水氧化法对其进行降解。探讨了温度、压力和氧过量率在对叔丁基邻苯二酚废水的超临界水氧化降解中的影响,并采用恒定温度改变压力的方式进行考察,温度设置为400,450,500,550℃,压力考察范围为18—27 MPa。COD检测作为重要的评价手段得到应用,并通过COD降解结果来说明对叔丁基邻苯二酚的去除。由结果可知:超临界水氧化法对废水中对叔丁基邻苯二酚的降解有很高的效率,达到了快速降解,其COD去除率能够达到99.3%,COD剩余量可稳定控制在50 mg/L以下。与此同时,该过程的工艺参数得到了优化,当废水质量分数≤0.15%时,其最优温度和最优压力分别为550℃和25 MPa,最优氧过量率区间为2—3。In order to efficiently remove the TBC in the wastewater sample,SCWO（ supercritical water oxidation）was used for degradation. The effects of temperature,pressure and oxygen excess on degradation were investigated.The method that the pressure is changed with constant temperature was used,the temperature sets were 400,450,500 and 550 ℃,and the pressure was 18-27 MPa. The COD test was used to be the main evaluation method. The results show that the SCWO is high efficiency on the treatment of the wastewater which contains TBC,and the COD removal can reach 99. 3%. The amount of COD remaining in the samples after SCWO can be steadily controlled under 50 mg / L. Meanwhile,these process parameters can be optimized. When the mass fraction of TBC is ≤0. 15%,the optimum temperature and pressure are 550 ℃ and 25 MPa,respectively. Its optimum oxygen excess is within 2-3.

关 键 词：超临界水 氧化 废水 对叔丁基邻苯二酚 

分 类 号：X703[环境科学与工程—环境工程]