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Modeling the Formation and Properties of Traditional and Non-traditional Secondary Organic Aerosol: Problem Formulation and Application to Aircraft Exhaust : Volume 12, Issue 4 (18/04/2012)

By Jathar, S. H.

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Book Id: WPLBN0003982603
Format Type: PDF Article :
File Size: Pages 39
Reproduction Date: 2015

Title: Modeling the Formation and Properties of Traditional and Non-traditional Secondary Organic Aerosol: Problem Formulation and Application to Aircraft Exhaust : Volume 12, Issue 4 (18/04/2012)  
Author: Jathar, S. H.
Volume: Vol. 12, Issue 4
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Presto, A. A., Adams, P. J., Jathar, S. H., Miracolo, M. A., & Robinson, A. L. (2012). Modeling the Formation and Properties of Traditional and Non-traditional Secondary Organic Aerosol: Problem Formulation and Application to Aircraft Exhaust : Volume 12, Issue 4 (18/04/2012). Retrieved from http://ebooklibrary.org/


Description
Description: Engineering and Public Policy, Carnegie Mellon University, Pittsburgh PA, USA. We present a methodology to model secondary organic aerosol (SOA) formation from the photo-oxidation of low-volatility organics (semi-volatile and intermediate volatility organic compounds). The model is parameterized and tested using SOA data collected during two field campaigns that characterized the atmospheric evolution of dilute gas-turbine engine emissions using a smog chamber. Photo-oxidation formed a significant amount of SOA, much of which cannot be explained based on the emissions of traditional, speciated precursors; we refer to this as non-traditional SOA (NT-SOA). The NT-SOA can be explained by emissions of low-volatility organic vapors measured using sorbents. Since these vapors could not be speciated, we employ a volatility-based approach to model NT-SOA formation. We show that the method proposed by Robinson et al. (2007) is unable to explain the timing of NT-SOA formation because it assumes a very modest reduction in volatility of the precursors with every oxidation reaction. In contrast, a Hybrid method, similar to models of traditional SOA formation, assumes a larger reduction in volatility with each oxidation step and results in a better reproduction of NT-SOA formation. The NT-SOA yields estimated for the low-volatility organic vapor emissions are similar to literature data for large n-alkanes and other low-volatility organics. The yields vary with fuel composition (JP8 versus Fischer-Tropsch) and engine load (idle versus non-idle). These differences are consistent with the expected contribution of high (aromatics and n-alkanes) and low (branched alkanes and oxygenated species) SOA forming species to the exhaust.

Summary
Modeling the formation and properties of traditional and non-traditional secondary organic aerosol: problem formulation and application to aircraft exhaust

Excerpt
Atkinson, R. and Arey, J.: Atmospheric degradation of volatile organic compounds, Chem. Rev., 103, 4605–4638, 2003.; Bernstein, J. A., Alexis, N., Barnes, C., Bernstein, I. L., Bernstein, J. A., Nel, A., Peden, D., Diaz-Sanchez, D., Tarlo, S. M., and Williams, P. B.: Health effects of air pollution, J. Allergy Clin. Immun., 114, 1116–1123, 2004.; Chacon-Madrid, H. J. and Donahue, N. M.: Fragmentation vs. functionalization: chemical aging and organic aerosol formation, Atmos. Chem. Phys., 11, 10553–10563, doi:10.5194/acp-11-10553-2011, 2011.; Chacon-Madrid, H. J., Presto, A. A., and Donahue, N. M.: Functionalization vs. fragmentation: n-aldehyde oxidation mechanisms and secondary organic aerosol formation, Phys. Chem. Chem. Phys., 12, 13975–13982, doi:10.1039/c0cp00200c, 2010.; Corporan, E., Edwards, T., Shafer, L., DeWitt, M. J., Klingshirn, C., Zabarnick, S., West, Z., Striebich, R., Graham, J., and Klein, J.: Chemical, thermal stability, seal swell, and emissions studies of alternative jet fuels, Energ. Fuels, 25, 955–966, doi:10.1021/ef101520v, 2011.; Donahue, N., Robinson, A., Stanier, C., and Pandis, S.: Coupled partitioning, dilution, and chemical aging of semivolatile organics, Environ. Sci. Technol, 40, 2635–2643, doi:10.1021/es052297c, 2006.; Drozd, G. T., Miracolo, M. A., Presto, A. A., Corporan, E., Lipsky, E. M., and Robinson, A. L.: Particulate and organic vapor emissions from an in-use helicopter engine, in preparation, 2012.; Dzepina, K., Volkamer, R. M., Madronich, S., Tulet, P., Ulbrich, I. M., Zhang, Q., Cappa, C. D., Ziemann, P. J., and Jimenez, J. L.: Evaluation of recently-proposed secondary organic aerosol models for a case study in Mexico City, Atmos. Chem. Phys., 9, 5681–5709, doi:10.5194/acp-9-5681-2009, 2009.; Dzepina, K., Cappa, C. D., Volkamer, R. M., Madronich, S., DeCarlo, P. F., Zaveri, R. A., and Jimenez, J. L.: Modeling the multiday evolution and aging of secondary organic aerosol during milagro 2006, Environ. Sci. Technol., 45, 3496–3503, doi:10.1021/es103186f, 2010.; Farina, S. C., Adams, P. J., and Pandis, S. N.: Modeling global secondary organic aerosol formation and processing with the volatility basis set: Implications for anthropogenic secondary organic aerosol, J. Geophys. Res., 115, D09202, doi:10.1029/2009JD013046, 2010.; Goldstein, A. H. and Galbally, I. E.: Known and unexplored organic constituents in the earth's atmosphere, Environ. Sci. Technol., 41, 1514–1521, doi:10.1021/es072476p, 2007.; Grieshop, A. P., Donahue, N. M., and Robinson, A. L.: Laboratory investigation of photochemical oxidation of organic aerosol from wood fires 2: analysis of aerosol m

 

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