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Α-pinene Photooxidation Under Controlled Chemical Conditions – Part 1: Gas-phase Composition in Low- and High-noX Environments : Volume 12, Issue 3 (01/03/2012)

By Eddingsaas, N. C.

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Book Id: WPLBN0003976275
Format Type: PDF Article :
File Size: Pages 37
Reproduction Date: 2015

Title: Α-pinene Photooxidation Under Controlled Chemical Conditions – Part 1: Gas-phase Composition in Low- and High-noX Environments : Volume 12, Issue 3 (01/03/2012)  
Author: Eddingsaas, N. C.
Volume: Vol. 12, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Eddingsaas, N. C., Wennberg, P. O., Yee, L. D., Loza, C. L., & Seinfeld, J. H. (2012). Α-pinene Photooxidation Under Controlled Chemical Conditions – Part 1: Gas-phase Composition in Low- and High-noX Environments : Volume 12, Issue 3 (01/03/2012). Retrieved from

Description: Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA. The OH oxidation of α-pinene under both low- and high-NOx environments was studied in the Caltech atmospheric chambers. Ozone was kept low to ensure OH was the oxidant. The initial α-pinene concentration was 20–50 ppb to ensure that the dominant peroxy radical pathway under low-NOx conditions is reaction with HO2 and under high-NOx conditions, reactions with NO. Here we present the gas-phase results observed. Under low-NOx conditions the main first generation oxidation products are α-pinene hydroxy hydroperoxide and pinonaldehyde, accounting for over 40% of the yield. In all, 65–75% of the carbon can be accounted for in the gas phase; this excludes first-generation products that enter the particle phase. We suggest that pinonaldehyde forms from RO2 + HO2 through an alkoxy radical channel that regenerates OH, a mechanism typically associated with acyl peroxy radicals, not alkyl peroxy radicals. The OH oxidation and photolysis of α-pinene hydroxy hydroperoxides leads to further production of pinonaldehyde, resulting in total pinonaldehyde yield from low-NOx OH oxidation of ~33%. The low-NOx OH oxidation of pinonaldehyde produces a number of carboxylic acids and peroxyacids known to be important secondary organic aerosol components. Under high-NOx conditions, pinonaldehyde was also found to be the major first-generation OH oxidation product. The high-NOx OH oxidation of pinonaldehyde did not produce carboxylic acids and peroxyacids. A number of organonitrates and peroxyacyl nitrates are observed and identified from α-pinene and pinonaldehyde.

Α-pinene photooxidation under controlled chemical conditions – Part 1: Gas-phase composition in low- and high-NOx environments

Alvarado, A., Tuazon, E. C., Aschmann, S. M., Atkinson, R., and Arey, J.: Products of the gas-phase reactions of O(^3P) atoms and O3 with alpha -pinene and 1,2-dimethyl-1-cyclohexene, J. Geophys. Res.-Atmos., 103, 25541–25551, doi:10.1029/98JD00524, 1998.; Arey, J., Atkinson, R., and Aschmann, S. M.: Produt study of the gas-phase reactions of monoterpenes with the OH radical in the presence of NOx, J. Geophys. Res., 95, 18539–18546, doi:10.1029/JD095iD11p18539, 1990.; Aschmann, S. M., Atkinson, R., and Arey, J.: Products of reaction of OH radicals with alpha-pinene, J. Geophys. Res.-Atmos., 107, D14, doi:10.1029/2001JD001098, 2002.; Atkinson, R.: Kinetics and mechanisms of the gas-phase reactions of the hydroxyl radical with organic compounds under atmospheric conditions, Chem. Rev., 86, 69–201, 1986.; Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., Troe, J., and IUPAC Subcommittee: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume II – gas phase reactions of organic species, Atmos. Chem. Phys., 6, 3625–4055, doi:10.5194/acp-6-3625-2006, 2006.; Baasandorj, M., Papanastasiou, D. K., Talukdar, R. K., Hasson, A. S., and Burkholder, J. B.: \chem{(CH_3)_3COOH} (tert-butyl hydroperoxide): OH reaction rate coefficients between 206 and 375 K and the OH photolysis quantum yield at 248 nm, Phys. Chem. Chem. Phys., 12, 12101–12111, doi:10.1039/C0CP00463D, 2010.; Berndt, T., Boge, O., and Stratmann, F.: Gas-phase ozonolysis of alpha-pinene: gaseous products and particle formation, Atmos. Environ., 37, 3933–3945, 2003.; Birdsall, A. W., Andreoni, J. F., and Elrod, M. J.: Investigation of the role of bicyclic peroxy radicals in the oxidation mechanism of toluene, J. Phys. Chem. A, 114, 10655–10663, 2010.; Blin-Simiand, N., Jorand, F., Sahetchian, K., Brun, M., Kerhoas, L., Malosse, C., and Einhorn, J.: Hydroperoxides with zero, one, two or more carbonyl groups formed during the oxidation of n-dodecane, Combust. Flame, 126, 1524–1532, doi:10.1016/s0010-2180(01)00264-4, 2001.; Capouet, M. and Müller, J.-F.: A group contribution method for estimating the vapour pressures of α-pinene oxidation products, Atmos. Chem. Phys., 6, 1455–1467, doi:10.5194/acp-6-1455-2006, 2006.; Capouet, M., Peeters, J., Noziere, B., and Müller, J.-F.: Alpha-pinene oxidation by OH: simulations of laboratory experiments, Atmos. Chem. Phys., 4, 2285–2311, doi:10.5194/acp-4-2285-2004, 2004.; Capouet, M., Mueller, J. F., Ceulemans, K., Compernolle, S., Vereecken, L., and Peeters, J.: Modeling aerosol formation in alpha-pinene photo-oxidation experiments, J. Geophys. Res.-Atmos., 113, D02308, doi:10.1029/2007JD008995, 2008.; Carter, W. P. L., Darnall, K. R., Graham, R. A., Winer, A. M., and Pitts, J. N.: Reactions of C2 and C4 alpha-hydroxy radicals with oxygen, J. Phys. Chem., 83, 2305–2311, 1979.; Chung, S. H. and Seinfeld, J. H.: Global distribution and climate forcing of carbonaceous aerosols, J. Geophys. Res.-Atmos., 107, D19, doi:10.1029/2001JD001397, 2002.; Cocker, D. R. I., Flagan, R. 


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