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Open AccessArticle

Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation

1
Instituto de Investigación en Combustión y Contaminación Atmosférica, Universidad de Castilla-La Mancha, Camino de Moledores s/n, 13071 Ciudad Real, Spain
2
Departamento de Química Física, Universidad de Castilla-La Mancha, Avda, Camilo José Cela 1B, 13071 Ciudad Real, Spain
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(7), 715; https://doi.org/10.3390/atmos11070715
Received: 25 May 2020 / Revised: 1 July 2020 / Accepted: 2 July 2020 / Published: 5 July 2020
The gas-phase reaction between trans-2-methyl-2-butenal and chlorine (Cl) atoms has been studied in a simulation chamber at 298 ± 2 K and 760 ± 5 Torr of air under free-NOx conditions. The rate coefficient of this reaction was determined as k = (2.45 ± 0.32) × 10−10 cm3 molecule−1 s−1 by using a relative method and Fourier transform infrared spectroscopy. In addition to this technique, gas chromatography coupled to mass spectrometry and proton transfer time-of-flight mass spectrometry were used to detect and monitor the time evolution of the gas-phase reaction products. The major primary reaction product from the addition of Cl to the C-3 of trans-2-methyl-2-butenal was 3-chloro-2-butanone, with a molar yield (YProd) of (52.5 ± 7.3)%. Acetaldehyde (Y = (40.8 ± 0.6)%) and HCl were also identified, indicating that the H-abstraction by Cl from the aldehyde group is a reaction pathway as well. Secondary organic aerosol (SOA) formation was investigated by using a fast mobility particle sizer spectrometer. The SOA yield in the Cl + trans-2-methyl-2-butenal reaction is reported to be lower than 2.4%, thus its impact can be considered negligible. The atmospheric importance of the titled reaction is similar to the corresponding OH reaction in areas with high Cl concentration. View Full-Text
Keywords: Cl atom; branched unsaturated aldehyde; kinetics; gas-phase products; secondary organic aerosol (SOA) Cl atom; branched unsaturated aldehyde; kinetics; gas-phase products; secondary organic aerosol (SOA)
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MDPI and ACS Style

Antiñolo, M.; Asensio, M.; Albaladejo, J.; Jiménez, E. Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation. Atmosphere 2020, 11, 715. https://doi.org/10.3390/atmos11070715

AMA Style

Antiñolo M, Asensio M, Albaladejo J, Jiménez E. Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation. Atmosphere. 2020; 11(7):715. https://doi.org/10.3390/atmos11070715

Chicago/Turabian Style

Antiñolo, María; Asensio, María; Albaladejo, José; Jiménez, Elena. 2020. "Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation" Atmosphere 11, no. 7: 715. https://doi.org/10.3390/atmos11070715

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