Temperature dependence of secondary organic aerosol formation by photo-oxidation of hydrocarbons
Temperature dependence of secondary organic aerosol formation by photo-oxidation of hydrocarbons
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DOI：
10.1016/s1352-2310(03)00359-5
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发表时间：
2003-08
影响因子：
5
通讯作者：
H. Takekawa;H. Minoura;S. Yamazaki
中科院分区：
文献类型：
--
作者：
H. Takekawa;H. Minoura;S. Yamazaki
利用温控烟雾箱进行了碳氢化合物的光氧化实验，研究了二次有机气溶胶（SOA）形成的温度依赖性。在较低的温度和较高的SOA浓度下，获得了较高的SOA产率。SOA产率与温度和SOA浓度的关系由考虑温度依赖性的气体/颗粒分配吸收模型表示。在SOA浓度相同的条件下，283 K时的SOA产额约为303 K时的2倍。实验表明，温度是影响SOA形成的重要因素之一。实验不仅用三种芳烃（甲苯、间二甲苯和1，2，4-三甲基苯）和一种生物烯烃（α-蒎烯）进行，而且用一种烷烃（正十一烷）进行，对SOA的形成进行了很少的实验。正十一烷表明SOA产率低于本研究中研究的任何其他烃。
Photo-oxidation experiments on hydrocarbons were performed with a temperature-controlled smog chamber to study the temperature dependence of secondary organic aerosol (SOA) formation. A higher SOA yield was obtained at lower temperature and with a higher concentration of SOA generated. The relationship of SOA yield to temperature and SOA concentration is expressed by a gas/particle partitioning absorption model considered with temperature dependence. Under the condition of the same SOA concentration, the SOA yield at 283K was approximately twice that at 303K. It has been clarified experimentally that temperature is one of the most important factors in SOA formation. The experiments were performed not only with three aromatic hydrocarbons (toluene, m-xylene and 1,2,4-trimethylbenzene) and one biogenic alkene (α-pinene), but also with one alkane (n-undecane) on which few experiments for SOA formation have been performed. n-Undecane indicates a lower SOA yield than any other hydrocarbon investigated in this study.