Smog chamber study on aging of combustion soot in isoprene/SO₂/NOx system: Changes of mass, size, effective density, morphology and mixing state

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• 作者：Kangwei Li ; Linghong Chen ; ^{chenlh@zju.edu.cn} ; Ke Han ; Biao Lv ; Kaiji Bao ; Xuecheng Wu ; Xiang Gao ; Kefa Cen
• 关键词：Smog chamber ; Complex air pollution ; Soot aging ; SOA ; Heterogeneous reaction
• 刊名：Atmospheric Research
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：184
• 期：Complete
• 页码：139-148
• 全文大小：1659 K
• 卷排序：184

文摘

We firstly proposed possible aging pathways of soot in isoprene/SO2/NOx complex system. A competitive mechanism between H2SO4(g) and isoprene oxidation vapor may exist on soot aging process. SO2 and isoprene may have synergetic effect on soot aging and lead to significant increase of secondary particle formation. High RH condition was found to accelerate soot aging and contribute to new particle formation in isoprene/NOx/SO2 system.