金属化合物催化多环芳烃合成二口恶英的机理  

Mechanism of PCDD/Fs formation from PAHs catalyzed by metal compounds

作　　者：严密[1] 李晓东[1] 张晓翔[1] 刘科[1] 严建华[1] 岑可法[1] 

机构地区：[1]能源清洁利用国家重点实验室(浙江大学),浙江杭州310027

出　　处：《化工学报》2009年第5期1254-1259,共6页CIESC Journal

基　　金：教育部新世纪优秀人才支持计划( NECT/05/0524);国家自然科学基金项目(50576082);国家高技术研究发展计划项目(2007AA06Z336)~~

摘　　要：为研究飞灰中金属化合物催化多环芳烃合成二口恶英的机理,进行了不同催化剂和苊的燃烧试验,同时进行了X射线衍射试验(XRD)和热重试验(TGA)。根据试验结果分析得到:多环芳烃主要以denovo反应合成二口恶英,PCDFs占主要成分;在无氯气氛下,CuCl2绝大部分还原生成CuCl,金属氯化物主要通过金属配位体提供氯源;CuCl2和FeCl3对催化裂解氧化苊的作用相似;CuCl2在150～200℃就可以和苊催化反应生成二口恶英或氯代有机物。In order to understand the effect of different metal compounds on polychlorinated dibenzo-pdioxins and polychlorinated dihenzofurans （PCDD/Fs） formation from polycyclic aromatic hydrocarbons （PAHs）, a series of experiments were conducted with different metal compounds as catalysts and acenaphthylene （AcPy） on a fixed-bed reactor. X-ray diffraction and thermogravimetry were made to monitor the reaction. The experimental results revealed that PCDD/Fs from PAHs were mainly formed by de novo synthesis. Without the presence of C12, most of cupric chloride were reduced to cuprous chloride. Metal chloride offered chlorine through metal complex. CuCl2 and FeCl3 played a similar role in activating the formation of organic chlorinated compounds. AcPy could form dioxins or other chlorinated compounds catalyzed by CuCl2 at 150-200℃.

关 键 词：二噁英 苊 金属化合物 催化剂 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]