Atmospheric Degradation of CH2═C(CH3)C(O)OCH3 Initiated by OH Radicals: Mechanistic Study and Quantification of CH3C(O)C(O)OCH3 in NOx Free Air

2015 ◽  
Vol 119 (33) ◽  
pp. 8775-8783 ◽  
Author(s):  
Rodrigo G. Gibilisco ◽  
Jorge G. Uranga ◽  
Ana N. Santiago ◽  
Mariano A. Teruel
Keyword(s):  
Mechanistic Study ◽  
Oh Radicals ◽  
Free Air ◽  
Atmospheric Degradation

Atmospheric Degradation of CF3OCFCF2:  Kinetics and Mechanism of Its Reaction with OH Radicals and Cl Atoms

2000 ◽  
Vol 104 (13) ◽  
pp. 2925-2930 ◽  
Author(s):  
M. Mashino ◽  
M. Kawasaki ◽  
T. J. Wallington ◽  
M. D. Hurley
Keyword(s):  
Kinetics And Mechanism ◽  
Oh Radicals ◽  
Atmospheric Degradation ◽  
Cl Atoms

scholarly journals Evaluation of the daytime tropospheric loss of 2-methylbutanal

2021 ◽  
Author(s):  
María Asensio ◽  
María Antiñolo ◽  
Sergio Blázquez ◽  
José Albaladejo ◽  
Elena Jiménez
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Degradation Products ◽  
Rate Coefficients ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Gaseous Products ◽  
Flight Mass Spectrometry ◽  
Atmospheric Degradation ◽  
The Impact

Abstract. Saturated aldehydes, e.g. 2-methylbutanal (2MB, CH3CH2CH(CH3)C(O)H), are emitted into the atmosphere by several biogenic sources. The first step in the daytime atmospheric degradation of 2MB involves gas-phase reactions initiated by hydroxyl (OH) radicals, chlorine (Cl) atoms and/or sunlight. In this work, we report the rate coefficients for the gas-phase reaction of 2MB with OH (kOH) and Cl (kCl) together with the photolysis rate coefficient (J) in the ultraviolet solar actinic region in Valencia (Spain) at different times of the day. The temperature dependence of kOH was described in the 263–353 K range by the following Arrhenius expression: kOH(T)=(8.88±0.41)×10-12 exp[(331±14)/T] cm3 molecule-1 s-1. At 298 K, the reported kOH and kCl are (2.68±0.07)×10-11 cm3 molecule-1 s-1 and (2.16±0.16)×10-11 cm3 molecule-1 s-1. Identification and quantification of the gaseous products of the Cl-reaction and those from the photodissociation of 2MB were carried out in a smog chamber by different techniques (Fourier transform infrared spectroscopy, proton transfer time-of-flight mass spectrometry, and gas chromatography coupled to mass spectrometry). The formation and size distribution of secondary organic aerosols formed in the Cl-reaction was monitored by a fast mobility particle sizer spectrometer. A discussion on the relative importance of the first step in the daytime atmospheric degradation of 2MB is presented together with the impact of the degradation products in marine atmospheres.

scholarly journals Atmospheric degradation of pyridine: UV absorption spectrum and reaction with OH radicals and O3

2016 ◽  
Vol 662 ◽  
pp. 141-145 ◽  
Author(s):  
M. Errami ◽  
G. El Dib ◽  
M. Cazaunau ◽  
E. Roth ◽  
R. Salghi ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Uv Absorption ◽  
Oh Radicals ◽  
Atmospheric Degradation ◽  
Uv Absorption Spectrum

Atmospheric degradation of 2- nitrobenzaldehyde: Photolysis and reaction with OH radicals

2017 ◽  
Vol 171 ◽  
pp. 221-228 ◽  
Author(s):  
H. Bouya ◽  
M. Al Rashidi ◽  
E. Roth ◽  
R. Salghi ◽  
A. Chakir
Keyword(s):  
Oh Radicals ◽  
Atmospheric Degradation

Atmospheric Degradation of Glycidaldehyde:  Photolysis and Reaction with OH Radicals

1998 ◽  
Vol 32 (22) ◽  
pp. 3515-3521 ◽  
Author(s):  
S. Ma ◽  
I. Barnes ◽  
K. H. Becker
Keyword(s):  
Oh Radicals ◽  
Atmospheric Degradation

A Kinetic and Mechanistic Study of the Reactions of OH Radicals and Cl Atoms with 3,3,3-Trifluoropropanol under Atmospheric Conditions

2005 ◽  
Vol 109 (2) ◽  
pp. 347-355 ◽  
Author(s):  
Tanya Kelly ◽  
Valérie Bossoutrot ◽  
Isabelle Magneron ◽  
Klaus Wirtz ◽  
Jack Treacy ◽  
...  
Keyword(s):  
Mechanistic Study ◽  
Oh Radicals ◽  
Atmospheric Conditions ◽  
Cl Atoms
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