物理化学学报 >> 2006, Vol. 22 >> Issue (05): 596-601.doi: 10.3866/PKU.WHXB20060516

研究论文 上一篇    下一篇

乙苯光氧化产生二次有机气溶胶的化学成分及反应机理分析

黄明强;郝立庆;周留柱;顾学军;王振亚;方黎;张为俊   

  1. 中国科学院安徽光学精密机械研究所环境光谱学实验室, 合肥 230031
  • 收稿日期:2005-11-24 修回日期:2006-01-17 发布日期:2006-04-28
  • 通讯作者: 张为俊 E-mail:wjzhang@aiofm.ac.cn

Chemical Composition and Reaction Mechanisms for Secondary Organic Aerosol from Photooxidation of Ethylbenzene

HUANG Ming-Qiang;HAO Li-Qing;ZHOU Liu-Zhou;GU Xue-Jun;WANG Zhen-Ya;FANG Li;ZHANG Wei-Jun   

  1. Laboratory of Environment Spectroscopy, Anhui Institute of Optics&Fine Mechanics,Chinese Academy of Sciences, Hefei 230031, P. R. China
  • Received:2005-11-24 Revised:2006-01-17 Published:2006-04-28
  • Contact: ZHANG, Wei-Jun E-mail:wjzhang@aiofm.ac.cn

摘要: 在自制的烟雾腔内,研究羟基自由基(OH·)启动的乙苯的光氧化反应和一系列后续反应,产生了二次有机气溶胶. 采用空气动力学直径粒谱分析仪分析了气溶胶粒子的尺寸分布;并用自制的气溶胶飞行时间质谱仪快速、实时地测量了单个二次有机气溶胶粒子的分子组分. 初步探讨了这些组分的可能反应机理.

关键词: 乙苯, 二次有机气溶胶, 烟雾腔, 激光解吸附电离, 反应机理

Abstract: A laboratory study was carried out to investigate the secondary organic aerosol (SOA) products from photooxidation of the aromatic hydrocarbon ethylbenzene. The experiments were conducted by irradiating ethylbenzene/CH3ONO/NOx mixtures in a home-made smog chamber. Size distribution of the secondary organic aerosol particles was detected with an aerodynamic particle sizer spectrometer. The aerosol time-of-flight mass spectrometer (ATOFMS) was used to measure the chemical composition of individual secondary organic aerosol particle in real time. According to a large number of single aerosol mass spectra, the chemical composition of SOA was obtained statistically. The possible reaction mechanisms leading to these products were also discussed.

Key words: Ethylbenzene, Secondary organic aerosol, Smog chamber, Laser desorption/ ionization, Reaction mechanisms