典型含氮有机化合物超临界水氧化脱氮过程  

Denitrogenation Processes of Typical N-containing Organic Compounds in Supercritical Water Oxidation

作　　者：王瀚 徐东海 王瑜 杨万鹏 孙韶艳 Wang Han;Xu Donghai;Wang Yu;Yang Wanpeng;Sun Shaoyan(Key Laboratory of Thermo-Fluid Science&Engineering,Ministry of Education,School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an Shanxi 710049)

机构地区：[1]西安交通大学能源与动力工程学院热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《东北电力大学学报》2021年第5期1-8,F0002,F0003,共10页Journal of Northeast Electric Power University

基　　金：陕西省自然科学基础研究计划联合基金项目(2019JLM-21);国家自然科学基金(22078258);中央高校基本科研业务费(xtr042019015,xjh012019005)。

摘　　要：超临界水氧化技术在处理高浓度难生化降解有机废水方面具有光明的发展前景.含氮有机物的高效转化去除通常是过程速率的控制步骤.文中总结分析了甲胺、苯胺、硝基苯、喹唑啉这四种典型含氮有机化合物超临界水氧化过程中氮的迁移转化路径,阐明了相应的超临界水氧化脱氮机理.结果表明:甲胺主要发生C-中心脱氢,苯胺氧化主要存在六种潜在转化路径,硝基苯脱氮主要通过高温热解产生·NO_(2)及·C_(6)H_(5)形成苯胺,喹唑啉开环以苯环开环为主.这些信息有助于深入认识和优化含氮有机物超临界水氧化过程.Supercritical water oxidation has a promising future in degrading high concentration bio-refractory organic wastewater.Efficient conversion and removal of N-containing organic matters are commonly the ratelimiting step in the process above.The work summarizes and analyzes transformation approaches of nitrogen in supercritical water oxidation of four types of typical N-containing organic compounds(i.e.,methylamine,aniline,nitrobenzene and quinazoline),and reveals their corresponding denitrogenation mechanisms.The results show that methylamine majorly takes place C-center dehydrogenation,there are six kinds of potential conversion pathways in aniline oxidation,nitrobenzene can transform into aniline mainly through·NO_(2) and·C_(6)H_(5) derived from pyrolysis to remove nitrogen,and the ring opening of quinazoline is primarily benzene ring opening.This information helps to deeply understand and optimize supercritical water oxidation of N-containing organic matters.

关 键 词：含氮有机物 超临界水氧化 脱氮 反应机理 

分 类 号：O0622.6[理学]