【摘要】 利用多层吸附管采样和热脱附/色谱/质谱系统研究了家用炉灶燃煤过程单环芳烃释放情况。结果显示,燃煤烟气中的单环芳烃组分主要以苯、甲苯为主,平均浓度分别达到1672.3和1631.3μg/m3。从烟气中单环芳烃水平来看,家用炉灶燃煤释放的单环芳烃大大超过电站燃煤和生物质能燃烧释放;烟气中的单环芳烃的组成形式也有别于电站燃煤、生物质能燃烧、机动车排放和油漆挥发的单环芳烃。研究中还分析了煤在氦气环境下热解释放的单环芳烃,并与家用炉灶燃煤释放的单环芳烃进行了比较。更多还原

【Abstract】 Monocyclic aromatic hydrocarbons(MAHS) from the smoke of coal-fired house stoves were collected by multi-bed adsorbent tube,and determined by GC/MSD after thermodesorption.Benzene and toluene were the main components of MAHS in the smoke,and their mean concentrations were as high as 1672.3 and 1631.3 ?g/m~3,respectively.The concentrations of MAHS in smoke from the coal-fired house stove largely exceeded those from coal-fired power station,biomass burning,motor vehicle and paint vapors.Also the MAHS composition was quite different compared to those from other sources.The MAHS from coal pyrolysis at 350℃ were tested and compared with that in the smoke from different combustion periods.更多还原