蜡烛燃烧产生的亚微米颗粒物的数量排放因子
THE NUMBER EMISSION FACTOR OF SUBMICRON PARTICLES FROM CANDLE COMBUSTION
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摘要: 蜡烛燃烧产生的亚微米颗粒物(在10nm—500nm范围内),稳定燃烧排放的颗粒物呈单峰正态分布,而非稳定燃烧呈近似双峰正态分布.将现场测得的浓度数据通过气溶胶动力方程转化为排放因子.结果表明,蜡烛燃烧产生的颗粒物在经过一段时间历程后,粒径谱会发生较大的变化,纳米级颗粒物逐渐消失,颗粒物的粒径有所增大.蜡烛在稳定燃烧环境下产生的亚微米颗粒物的数量排放因子为4.05×1012±0.73×1012个·g-1,在非稳定燃烧下的排放因子为1.49×1012±0.32×1012个·g-1.Abstract: Large amount of submicron particles are found from candle combustion,and within the range of 10nm—500nm,the size spectrum is log-normally distributed for a stable burning candle,and a bimodal log-normal distribution is found under unstable combustion.The field concentration data can be translated into emission factor through an aerosol dynamic model.The results indicate,the size spectrum of candle particles changes significantly after a segment time of evolution,and the nano-particles disappear gradually with the diameter increase.Under the current stable combustion environment,the emission factor is 4.05 1012±0.73×1012units·g-1 for a steady burning candle,and that the unstable burning candle is 1.49×1012±0.32×1012units·g-1.
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Key words:
- candle /
- submicron particle /
- emission factor /
- size distribution
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