SO_2对模拟燃煤烟气中汞形态分布影响的实验研究  

Effect of sulfur dioxide on the speciation of mercury in flue gases

作　　者：高洪亮[1] 周劲松[1] 骆仲泱 午旭杰[1] 倪明江[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用与环境工程教育部重点实验室,杭州310027

出　　处：《环境科学学报》2004年第2期204-209,共6页Acta Scientiae Circumstantiae

基　　金：国家高技术研究发展计划项目 (2 0 0 1AA5 2 90 4 0 );国家自然科学基金资助项目 (5 990 6 0 10 ) ;国家重点基础研究发展规划项目 (G19990 2 2 2 12 0 8)

摘　　要：采用OntarioHydro方法作为检测方法 ,在小型模拟燃煤烟气Hg形态转化实验台上研究了烟气中SO2 浓度、HCl浓度、O2 浓度变化对燃煤烟气中Hg形态分布的影响 .结果表明 :在CO2 O2 N2 的烟气体系中 ,加入SO2 后 ,Hg的转化率略有增加 ,随反应温度升高Hg的转化率逐渐降低 ,较高的O2 浓度可以促进Hg的氧化 .加入HCl后 ,随反应温度的升高Hg的转化率升高 ,SO2 的存在会降低Hg的转化率 ,HCl的浓度越大 ,转化率越大 ,较高的O2 浓度也可以促进Hg的氧化 .An experimental set-up was built, on which a bench-scale experimental was conducted to study the effects of SO_2 on the speciation distribution of mercury in simulated flue gases. The test method used here for mercury speciation was Ontario Hydro Method. The conclusions are as follows: In the CO_2-O_2-N_2-SO_2 system, conversion ratio of Hg^(2+) to total Hg became lower at higher reaction temperature, SO_2 could increase the conversion ratio of Hg^(2+) to total Hg and higher concentration of O_2 could enhance oxidation of Hg. In the CO_2-O_2-N_2-SO_2-HCl system, conversion ratio of Hg^(2+) to total Hg became higher at higher reaction temperature, but decreased at higher SO_2 concentration. The conversion ratio of Hg^(2+) to total Hg increased at higher HCl concentration and higher concentration of O_2 could enhance oxidation of Hg.

关 键 词：SO2 燃煤烟气 汞 转化率 反应温度 大气污染 

分 类 号：X784.01[环境科学与工程—环境工程] X132