Journal
ATMOSPHERIC ENVIRONMENT
Volume 202, Issue -, Pages 28-40Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2018.12.056
Keywords
Glycol-ethers; Tropospheric oxidants; Rate coefficients; Products of oxidation; Atmospheric implications
Funding
- CONICET [PIP 11220090100436]
- ANPCyT-FONCyT from Argentina [PICT2010708/BID2437/OC-AR]
- SECyT-UNC from Cordoba, Argentina [05/C146]
- CONICET
Ask authors/readers for more resources
The rate coefficients for the reactions of OH radicals and Cl atoms with 3-methoxy-1-propanol (3-M-1-POL) and 3-methoxy-l-butanol (3-M-1-BOL) in the gas-phase have been measured at (298 +/- 2) K and atmospheric pressure. A conventional relative-rate technique was used to determine the rate coefficients: k(1) (OH + 3-M-1-POL) = (2.15 +/- 0.28) x 10(-11), k(2) (OH + 3-M-1-BOL) = (2.38 +/- 0.31) x 10(-11), k(3) (Cl + 3-M-1-POL) = (2.66 +/- 0.23) x 10(-10) and k(4) (Cl + 3-M-1-BOL) = (2.95 +/- 0.27) x 10(-10), all in units of cm(3) molecule(-1)s(-1). The present work provides the first kinetic study of the reactions of Cl atoms with 3-M-1-POL and 3-M-1-BOL, and of the reaction of OH radicals with 3-M-1-POL. The kinetic results are presented and compared with those calculated (k(SAR)) using the structure-reactivity relationship (SAR) method, and reactivity trends are discussed. Additionally, products identification under atmospheric conditions was performed for the first time for the reactions cited above in the presence of NO, using two sampling methods and GC-MS-FID. 3-methoxypropanal, methyl formate and glycolaldehyde were identified from the 3-M-1-POL + OH/Cl reactions, while 3-methoxybutyraldehyde, methyl acetate and glycolaldehyde, were identified from the 3-M-1-BOL + OH/Cl reactions. From these identified products, a general scheme of the reaction mechanisms is proposed. Finally, based on the kinetic results and radiative efficiencies (REs) of the titled compounds, a discussion on the atmospheric implications due to its emissions into the troposphere is also presented.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available