超临界水催化氧化降解邻氨基苯酚  

Degradation of o-aminophenol by catalytic oxidation with supercritical water

作　　者：潘晟哲 黄体斌 陈禹 公彦猛[2] 刘树洋 徐宁 PAN Shengzhe;HUANG Tibin;CHEN Yu;GONG Yanmeng;LIU Shuyang;XU Ning(College of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211800,China;Jiangsu Province Key Laboratory of Environmental Engineering,Jiangsu Provincial Academy of Environmental Science,Nanjing 210036,China)

机构地区：[1]南京工业大学环境科学与工程学院,江苏南京211800 [2]江苏省环境科学研究院,江苏省环境工程重点实验室,江苏南京210036

出　　处：《南京工业大学学报（自然科学版）》2020年第2期207-213,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：水体污染控制与治理科技重大专项(2018ZX07208004);国家自然科学基金青年基金(51708262);江苏省环境工程重点实验室开放基金(ZX2017002)。

摘　　要：本实验通过超临界水氧化的方式对邻氨基苯酚进行催化氧化研究。探讨了以浸渍法所制备的CuO/CeO2/γ-Al2O3、Fe2O3/CeO2/γ-Al2O3和Mn2O3/CeO2/γ-Al2O3 3种催化剂对超临界水氧化降解邻氨基苯酚的影响。设计正交实验探究最佳的催化剂的制备方案以进行对邻氨基苯酚的超临界水氧化反应。本实验采用的实验装置为盐浴间歇式超临界水氧化(SCWO)实验装置、通过浸渍焙烧的材料作为超临界水氧化的催化剂,氧气作为实验的氧化剂,并以化学需氧量(COD)去除率反映超临界水氧化效果,本次实验通过催化剂Mn2O3/CeO2/γ-Al2O3的COD降解效果最佳,达到71.42%,比无催化剂的超临界水氧化降解效果提升33.6%。通过X线衍射(XRD)、扫描电子显微镜(SEM)分析发现Mn2O3有着良好的热稳定性,有助于提升良好的热稳定性。The catalytic oxidation of o-aminophenol was studied by means of supercritical water oxidation(SCWO). The effects of CuO/CeO2/γ-Al2O3, Fe2O3/CeO2/γ-Al2O3 and Mn2O3/CeO2/γ-Al2O3 catalysts prepared by impregnation on the degradation of o-aminophenol by supercritical water were investigated. Orthogonal experiments were designed to explore the optimal catalyst preparation scheme for the oxidation of o-aminophenol with supercritical water. The experimental device used in this experiment was salt bath intermittent SCWO experimental device. The impregnated material was used as the catalyst for supercritical water oxidation, and oxygen was used as the oxidant. The removal rate of chemical oxygen demand(COD)was used to reflect the effect of supercritical water oxidation. Finally, the COD degradation effect using the catalyst of Mn2O3/CeO2/γ-Al2O3 was the best, reaching 71.42%, which was 33.6% higher than that of the catalyst-free supercritical water. Through X-ray diffraction(XRD) and scanning electron microscope(SEM)analysis showed that Mn2O3 had good thermal stability, which was helpful to improve the thermal stability.

关 键 词：超临界水 降解 COD 催化剂 邻氨基苯酚 

分 类 号：X703[环境科学与工程—环境工程]