Kinetics of Reactions of CHF 2 CF 2 CH 2 OH with Cl Atoms and CHF 2 CF 2 CHO with OH Radicals and Atmospheric Degradation Pathways of CHF 2 CF 2 CH 2 OH: A Theoretical Investigation

2019 ◽  
Vol 4 (24) ◽  
pp. 7134-7143
Author(s):  
Bidisha Baidya ◽  
Makroni Lily ◽  
Asit K. Chandra
Keyword(s):  
Theoretical Investigation ◽  
Oh Radicals ◽  
Degradation Pathways ◽  
Atmospheric Degradation ◽  
Kinetics Of ◽  
Cl Atoms

Atmospheric degradation pathways and kinetics of 2,2-difluoroethanol (CHF2CH2OH) with Cl atom: A theoretical investigation

2019 ◽  
Vol 716 ◽  
pp. 35-41 ◽  
Author(s):  
Nand Kishor Gour ◽  
Nandini Priyam Rajkumari ◽  
Ramesh Chandra Deka ◽  
Subrata Paul ◽  
Ajanta Deka
Keyword(s):  
Theoretical Investigation ◽  
Degradation Pathways ◽  
Atmospheric Degradation ◽  
Kinetics Of ◽  
Cl Atom

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

Atmospheric chemistry of trans-CF3CHCHCl: Kinetics of the gas-phase reactions with Cl atoms, OH radicals, and O3

2008 ◽  
Vol 199 (1) ◽  
pp. 92-97 ◽  
Author(s):  
M.P. Sulbaek Andersen ◽  
E.J.K. Nilsson ◽  
O.J. Nielsen ◽  
M.S. Johnson ◽  
M.D. Hurley ◽  
...  
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Oh Radicals ◽  
Gas Phase Reactions ◽  
Kinetics Of ◽  
Cl Atoms

Study of the tropospheric degradation of 2-methylbutanal initiated by OH radicals, Cl atoms and sunlight

2021 ◽  
Author(s):  
María Asensio ◽  
Sergio Blázquez ◽  
María Antiñolo ◽  
José Albadalejo ◽  
Elena Jiménez
Keyword(s):  
Mass Spectrometry ◽  
Kinetic Study ◽  
Gas Phase ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Gas Phase Kinetics ◽  
Ftir Spectrometer ◽  
Kinetics Of ◽  
Cl Atoms

<p>The biogenic oxygenated volatile compound 2-methylbutanal (2MB) is emitted into the low atmosphere from several natural sources such as microbiological processes, wildland fires, or emissions from vegetation<sup>1</sup>. Moreover, some industrial operations also generate 2MB<sup>2</sup>. During the day, the oxidation of 2MB can be initiated by sunlight, hydroxyl (OH) radicals or chlorine (Cl) atoms in marine atmospheres. Up to date, gas-phase kinetics of OH with 2MB has only been studied at room temperature<sup>3</sup>. The photolysis rate coefficients (<em>J</em>) of 2MB initiated by sunlight have also been reported<sup>4</sup>. However, there is no available data for the reaction of Cl atoms with 2MB and the photolysis products.</p><p>In this work, the photolysis rate coefficient (<em>J</em>) of 2MB has been measured using a solar simulator in a Pyrex cell coupled to a Fourier Transform Infrared (FTIR) spectrometer to monitor the loss of 2MB. Moreover, the gas-phase kinetics of the reaction of 2MB with Cl (<em>k</em><sub>Cl</sub>) and OH (<em>k</em><sub>OH</sub>) have been investigated to evaluate the contribution of these homogeneous degradation routes to the total loss of 2MB in the atmosphere. All the kinetic experiments were carried out under free-NO<sub>x</sub> conditions (simulating a clean atmosphere). Regarding the relative kinetic study on the Cl-reaction, an atmospheric simulation chamber coupled to a FTIR spectrometer was used at 298 K and 760 Torr <sup>5</sup> of air, whereas for the absolute kinetics of the OH-reaction, <em>k</em><sub>OH</sub> was determined as a function of temperature and pressure (T = 263-353 K and P = 50-600 Torr of helium) by using a pulsed laser photolysis-laser induced fluorescence system<sup>6</sup>. Finally, in addition to FTIR, gas chromatography coupled to mass spectrometry and proton transfer time-of-flight mass spectrometry were used to detect the gas-phase reaction products when 2MB was exposed to Cl and sunlight. The atmospheric implications will be discussed in terms of lifetimes and reactions products.</p><p><strong>REFERENCES:</strong> <strong>1</strong>. Szwajkowska-Michale, L., Busko, M., Lakomy, P., and Perkowski, J.: Determination of profiles of volatile metabolites produced by Trametes versicolor isolates antagonistic towards Armillaria spp. Sylwan. <strong>2018</strong>, 162, 499–508. <strong>2. </strong>Kolar, P.; Kastner, J. R. Low-Temperature Catalytic Oxidation of Aldehyde Mixtures Using Wood Fly Ash: Kinetics, Mechanism, and Effect of Ozone. Chemosphere. <strong>2010</strong>, 78 (9), 1110–1115. <strong>3. </strong>D’Anna, B.; Andresen, O.; Gefen, Z. and Nielsen, C.J.: Kinetic study of OH and NO<sub>3</sub> radical reactions with 14 aliphatic aldehydes. Phys.Chem.Chem.Phys. <strong>2001</strong>, 3, 3057-3063. <strong>4. </strong>Wenger, J.C.: Chamber Studies on the Photolysis of Aldehydes. Environmental Simulation Chambers: Application to Atmospheric Chemical Processes. <strong>2006. </strong>Nato Science Series: IV: Earth and Environmental Science, vol 62. Springer, Dordrecht. <strong>5. </strong>Antiñolo, M.; Asensio, M.; Albadalejo, J. and Jiménez E.: Gas-Phase Reaction of trans-2-methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation. Atmosphere <strong>2020</strong>, 11 (7), 715. <strong>6. </strong>Blázquez, S.; Antiñolo, M.; Nielsen, O. J.; Albadalejo, J. and Jiménez, E.: Reaction kinetics of (CF<sub>3</sub>)<sub>2</sub>CFCN with OH radicals as a function of temperature (278-358 K): A good replacement for greenhouse SF<sub>6</sub>? Chem.Phys.Lett. <strong>2017</strong>, 687, 297-302.</p>

Atmospheric Chemistry of Methoxyflurane (CH3OCF2CHCl2): Kinetics of the gas-phase reactions with OH radicals, Cl atoms and O3

2019 ◽  
Vol 722 ◽  
pp. 119-123 ◽  
Author(s):  
Sofie A. Hass ◽  
Simone Thirstrup Andersen ◽  
Mads P. Sulbaek Andersen ◽  
Ole J. Nielsen
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Oh Radicals ◽  
Gas Phase Reactions ◽  
Kinetics Of ◽  
Cl Atoms

Atmospheric chemistry of CxF2x+1CHCH2 (x=1, 2, 4, 6, and 8): Kinetics of gas-phase reactions with Cl atoms, OH radicals, and O3

2005 ◽  
Vol 176 (1-3) ◽  
pp. 124-128 ◽  
Author(s):  
M.P. Sulbaek Andersen ◽  
O.J. Nielsen ◽  
A. Toft ◽  
T. Nakayama ◽  
Y. Matsumi ◽  
...  
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Oh Radicals ◽  
Gas Phase Reactions ◽  
Kinetics Of ◽  
Cl Atoms

Atmospheric chemistry of trans-CF3CHCHF: Kinetics of the gas-phase reactions with Cl atoms, OH radicals, and O3

2007 ◽  
Vol 443 (4-6) ◽  
pp. 199-204 ◽  
Author(s):  
R. Søndergaard ◽  
O.J. Nielsen ◽  
M.D. Hurley ◽  
T.J. Wallington ◽  
R. Singh
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Oh Radicals ◽  
Gas Phase Reactions ◽  
Kinetics Of ◽  
Cl Atoms
Sign in / Sign up

Export Citation Format

Share Document