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题名: Mechanism and Kinetics of Heterogeneous Reactions of Unsaturated Organic Acids on alpha-Al2O3 and CaCO3
作者: Wu, Lingyan1, 2; Liu, Qifan3, 4; Tong, Shengrui3; Jing, Bo3; Wang, Weigang3; Guo, Yucong3; Ge, Maofa3, 4, 5
关键词: acrylic acid ; diffuse reflectance infrared Fourier transform spectroscopy ; Knudsen cells ; methacrylic acid ; uptake coefficients
刊名: CHEMPHYSCHEM
发表日期: 2016-11-01
卷: 17, 期:21, 页:3515-3523
收录类别: SCI
英文摘要: Heterogeneous reactions have a vital role in the atmosphere due to their significant effects on the evolution of atmospheric aerosols, which in turn contribute to air pollution. However, the mechanism and kinetics of these processes involving unsaturated organic acids, important types of volatile organic compounds, are still unclear. In this work, the heterogeneous uptake of two representative atmospheric unsaturated organic acids (acrylic acid and methacrylic acid) on mineral aerosols including alpha-Al2O3 and CaCO3 are investigated using a Knudsen cell reactor and an in situ diffuse reflectance infrared Fourier transform spectrometry (DRIFTS) reactor. The corresponding reaction pathways are proposed from the DRIFTS analysis. In addition, the initial uptake coefficients of unsaturated organic acids and their heterogeneous fate are obtained for the first time. Our results suggest that heterogeneous reactions on alpha-Al2O3 and CaCO3 can be important sinks for acrylic acid and methacrylic acid, as well as possible contributors to the organic coating found on atmospheric aerosols, especially in high-pollution events.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/36514
Appears in Collections:分子动态与稳态结构实验室_期刊论文

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作者单位: 1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, CMA, Beijing 100081, Peoples R China
2.Chinese Acad Meteorol Sci, Key Lab Atmospher Chem, CMA, Beijing 100081, Peoples R China
3.Chinese Acad Sci, BNLMS, State Key Lab Struct Chem Unstable & Stable Speci, Inst Chem, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, CAS Ctr Excellence Urban Atmospher Environm CEUAE, Inst Urban Environm, Xiamen 361021, Peoples R China
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