Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/45572
標題: A theoretical evaluation on the HNO3 artifact of the annular denuder system due to evaporation and diffusional deposition of NH4NO3-containing aerosols
作者: Chang, K.F.
盧重興
Lu, C.S.
Bai, H.L.
Fang, G.C.
關鍵字: annular denuder system
measurement artifact
HNO3
NH4NO3
evaporation
mass accommodation coefficient
ammonium-nitrate aerosol
filter pack
acidic aerosols
air-pollutants
particle-size
performance
taiwan
collection
chloride
model
期刊/報告no:: Atmospheric Environment, Volume 36, Issue 27, Page(s) 4357-4366.
摘要: (A) mathematical model was developed to evaluate HNO3 artifact of the annular denuder system due to evaporation and diffusional deposition of nitrate-containing aerosols. The model performance was validated by comparing its numerical solutions with laboratory and numerical data available in the literature for evaporation and diffusional deposition of monodisperse and polydisperse NH4NO3 aerosols. Measurement artifacts were evaluated by varying typical sampling ranges of ambient temperature, HNO3 gas concentration, aerosol number concentration, aerosol mass median diameter, and nitrate mass fraction of < 2.5 mum aerosols to see their respective effects. Potential application of the present model on estimating HNO3 artifacts was demonstrated using literature data sampled in USA, Taiwan, Netherlands, Korea and Japan. Significant measurement artifact could be found in Taiwan and Netherlands due either to low HNO3 gas concentration and high nitrate concentration in < 2.5 mum aerosols or to high ambient temperature. (C) 2002 Elsevier Science Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/45572
ISSN: 1352-2310
文章連結: http://dx.doi.org/10.1016/s1352-2310(02)00352-7
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