燃煤排放正构烷烃类有机化合物的特征与形成演化机理研究

对云南阳宗海电厂、贵州贵阳电厂、北京清华大学实验电厂等三家电厂烟气降温过程排放的正构烷烃的含量分布与特征变化进行了分析 ,并与烟道下风向气溶胶样品中的正构烷烃含量分布与特征变化进行了对比。研究认为煤燃烧过程中正构烷烃的形成与演变是复杂有机污染物形成的重要组成阶段 ,其在煤粉燃烧以及烟气降温过程中分子特征的变化规律是有机自由基聚合与裂解的重要指示标志。

An Investigation on the Characteristics of the Discharge of Normal Paraffin Organic Compounds During a Coal-burning Process and Their Related Formation/evolution Mechanism

An analysis was conducted of the content distribution and characteristic changes of normal paraffin compounds discharged during the process of flue-gas temperature reduction at Yunnan Yangzonghai Power Plant, Guizhou Guiyang Power Plant and the Experimental Power Plant of Beijing Tsinghua University. The above-mentioned content distribution and characteristic changes identified during the analysis were compared with those in the aerosol sample taken at the flue duct leeward side. After an investigation the authors hold that the formation and evolution of the normal paraffin compounds during a coal-burning process represents an important formative stage of complicated organic pollutants. In addition, the mechanism of the change of molecular characteristics in the process of coal burning and flue gas temperature reduction constitutes a major distinguishing feature specific to a free radical polymerization and cracking.