【摘要】 以五家燃煤电厂为例 ,实验分析了飞灰总碳、元素碳、有机碳含量 ,并与飞灰中多环芳烃类 (PAHs)有机污染物吸附量作了相关分析 ;此外对比研究了燃煤排放PAHs与炉前煤中PAHs的关联性 ,从煤化学、煤燃烧学角度探讨了PAHs的吸附反应机制 ,提出煤粉燃烧过程中PAHs的一种重要形成机制 -未燃碳颗粒吸附反应机制 ,指出飞灰中的碳位不仅是PAHs的重要吸附位 ,同时也是PAHs的重要反应位。更多还原

【Abstract】 With five coal fired power plants serving as objects of study an experimental analysis was conducted of the content of total carbon, elemental carbon and organic carbon in fly ash. On this basis a study has been performed of the correlation of the content of the above items and the adsorption quantity of polycyclic aromatic hydrocarbons (PAHs) in fly ash. Furthermore, also studied was the correlation of PAHs given off by the burned coal and the PAHs in coal located at the furnace front. From the perspective of coal chemistry and coal combustion science discussed and explored was the adsorption reaction mechanism of the PAHs organic pollutants. As a result, proposed was a kind of major mechanism of PAHs formation during the burning of pulverized coal, the so called adsorption reaction mechanism of unburned carbon particles. It is noted that the carbon in fly ash serves not only as a major adsorption location but also as an important reaction location for PAHs.更多还原