摘要
采用基于中心复合设计(CCD)的响应面分析方法,以H2O2为氧化剂,对超临界水氧化降解喹啉废水的影响因素进行了探讨和分析,考察了温度、压力、停留时间、氧化剂过量倍数对废水降解的影响。在温度380~460℃,压力24~28 MPa,停留时间20~60 s,氧化剂过量倍数0%~400%的条件下分析了TOC去除率的变化。由Design-Expert7.0软件设计分析了实验数据,得到一个二次响应曲面模型,通过实验对模型进行了验证,结果表明,响应面模型的预测值与实验值吻合较好。在最佳操作点温度441℃,压力25 MPa,停留时间60 s,氧化剂过量2.48倍的条件下,TOC去除率达到最高值(95.19%)。
The effects of operating conditions on the supercritical water oxidation of quinoline wastewater were investigated by using response surface methodology(RSM)and central composite design(CCD),the H2O2 was used as the oxidation.RSM was also used to analyze the effects of temperature,pressure,residence time and excess oxidation on TOC removal.The low and high levels of temperature,pressure,residence time and excess oxidation were 380 to 460℃,24 to 28 MPa,20 to 60 s and 0% to 400%,respectively.Using the software of Design-Expert 7.0,a response surface quadratic model was obtained based on the experimental data.Additional experiments were performed to check the model,which showed that the predicted value agreed well with the experimental results.The optimum temperature,pressure,residence time and excess oxygen were found to be 441℃,25 MPa,60 s and 248%,respectively and the highest TOC removal efficiency(95.19%)could be achieved.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第10期3568-3572,共5页
Chinese Journal of Environmental Engineering
关键词
超临界水氧化
喹啉
响应面法
H2O2
TOC
supercritical water oxidation
quinoline
response surface methodology
H2O2
TOC