气候变化领域集成服务门户(CCPortal): Inversely modeling homogeneous H2SO4-H2O nucleation rate in exhaust-related conditions

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DOI	10.5194/acp-19-6367-2019
	Inversely modeling homogeneous H2SO4-H2O nucleation rate in exhaust-related conditions
	Olin M.; Alanen J.; Palmroth M.R.T.; Rönkkö T.; Dal Maso M.
发表日期	2019
ISSN	16807316
起始页码	6367
结束页码	6388
卷号	19 期号:9
英文摘要	The homogeneous sulfuric acid-water nucleation rate in conditions related to vehicle exhaust was measured and modeled. The measurements were performed by evaporating sulfuric acid and water liquids and by diluting and cooling the sample vapor with a sampling system mimicking the dilution process occurring in a real-world driving situation. The nucleation rate inside the measurement system was modeled inversely using CFD (computational fluid dynamics) and the aerosol dynamics code, CFD-TUTMAM (Tampere University of Technology Modal Aerosol Model for CFD). The nucleation exponents for the concentrations of sulfuric acid and water and for the saturation vapor pressure of sulfuric acid were found to be 1:9±0:1, 0:50±0:05, and 0:75±0:05, respectively. These exponents can be used to examine the nucleation mechanisms occurring in exhaust from different combustion sources (internal combustion engines, power plant boilers, etc.) or in the atmosphere. Additionally, the nucleation rate can be expressed with the exponents as a function of the concentrations of sulfuric acid and water and of temperature. The obtained function can be used as a starting point for inverse modeling studies of more complex nucleation mechanisms involving extra compounds in addition to sulfuric acid and water. More complex nucleation mechanisms, such as those involving hydrocarbons, are observed with real vehicle exhaust and are also supported by the results obtained in this study. Furthermore, the function can be used to improve air quality models by using it to model the effect of sulfuric acid-emitting traffic and power generation on the particle concentration in urban air. © Author(s) 2019.
语种	英语
scopus关键词	air quality; atmospheric chemistry; computational fluid dynamics; concentration (composition); homogeneity; hydroxyl radical; modeling; saturation; sulfuric acid
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144415
作者单位	Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, Tampere, 33014, Finland; Bio and Circular Economy, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, 33014, Finland; AGCO Power, Linnavuorentie 8-10, Linnavuori, 37240, Finland
推荐引用方式 GB/T 7714	Olin M.,Alanen J.,Palmroth M.R.T.,et al. Inversely modeling homogeneous H2SO4-H2O nucleation rate in exhaust-related conditions[J],2019,19(9).
APA	Olin M.,Alanen J.,Palmroth M.R.T.,Rönkkö T.,&Dal Maso M..(2019).Inversely modeling homogeneous H2SO4-H2O nucleation rate in exhaust-related conditions.Atmospheric Chemistry and Physics,19(9).
MLA	Olin M.,et al."Inversely modeling homogeneous H2SO4-H2O nucleation rate in exhaust-related conditions".Atmospheric Chemistry and Physics 19.9(2019).