【摘要】 用静态去除燃煤产生的CO2气体,经冷阱两步浓缩,气相色谱-质谱对燃煤产生的烟气样品进行了检测,近100种物质被检测出,其中,二氟二氯甲烷与当地大气背景相比呈显著异常。随着燃烧温度的变化,二氟二氯甲烷具规律性变化,当燃炉温度达到400℃左右时,氟里昂释放达到峰值。燃煤过程中,二氟二氯甲烷含量变化表现出与氯甲烷有明显的正相关关系,表明氟里昂的生成同氯甲烷有着密切的内在联系。除了氟里昂外,燃煤过程中产生的氯甲烷对大气环境的影响也不容忽视。更多还原

【Abstract】 The smoke from burning coal were analyzed by GC-MS after separation of CO₂ and condensed by cold trap. More than 100 organic substances were determined. The fact that the concentration of CFC-12 in the smoke from burning coal containing fluorine was significantly higher than the background value in local atmosphere was found and varied from furnace temperature. When the furnace temperature reached to 400℃, the concentration of CFC-12 increased to a peak value and then went down gradually with further rising of the furnace temperature. During the burning process the concentration of CFC-12 and CH₃Cl exhibited a close correlation. CFC-12 and CH₃Cl produced from coal combustion cause considerable impact on environment and great concern should be taken.更多还原