六氯苯碱催化分解脱氯效果及影响因素研究  

Study on base-catalyzed decomposition of hexachlorobenzene and influencing factors

作　　者：肖叶[1] 蒋建国[1] 杨勇 黄泳锋[1] 

机构地区：[1]清华大学环境学院,固体废物处理与环境安全教育部重点实验室,北京100084 [2]北京鼎实环境工程有限公司,北京100029

出　　处：《中国环境科学》2012年第12期2213-2218,共6页China Environmental Science

基　　金：国家“863”项目(2009AA064001)

摘　　要：采用自主设计开发的碱催化设备研究了碱催化分解技术(BCD)对六氯苯(HCB)脱氯的效果.考察了反应温度、氢氧化钠投加比例以及不同催化剂对六氯苯去除效率、脱氯效率以及中间代谢产物的影响.提高反应温度和氢氧化钠投加比例能够有效提高六氯苯的脱氯解毒效率,当六氯苯与氢氧化钠投加质量比为1:5时,在360℃下反应4h后,六氯苯的去除率为99.97%,脱氯效率达到91.08%.还原铁粉作为催化剂时,在330℃反应1h后,能够将六氯苯的脱氯效率由38.99%提高至77.51%.Base-catalyzed decomposition（BCD） of hexachlorobenzene（HCB） was studied in an independent-designed reactor.The effect of reaction temperature,sodium hydroxide proportion and different catalysts on the HCB removal efficiency,dechlorination efficiency and intermediates has been investigated.The HCB dechlorination efficiency improved with the increasing of reaction temperature and sodium hydroxide proportion.When the sodium hydroxide proportion was 1：5（HCB： sodium hydroxide,m/m） and the reaction temperature was 360℃,the removal efficiency and dechlorination efficiency of HCB reached 99.97% and 91.08% respectively in 4h.The HCB dechlorination efficiency was up to 77.51% instead of 38.99% by using iron power as the catalyst in 1h at 330℃.

关 键 词：六氯苯 碱催化分解技术(BCD) 反应温度 催化剂 

分 类 号：X705[环境科学与工程—环境工程]