Kinetics of the gas-phase reactions of the oh radical with selected glycol ethers, glycols, and alcohols

✍ Scribed by Sara M. Aschmann; Roger Atkinson

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 147 KB
• Volume: 30
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/(sici)1097-4601(1998)30:8<533::aid-kin2>3.0.co;2-t

✦ Synopsis

Using a relative rate method, rate constants have been measured for the gasphase reactions of the OH radical with 1-hexanol, 1-methoxy-2-propanol, 2-butoxyethanol, 1,2-ethanediol, and 1,2-propanediol at of (in units of ):

296 Ϯ 2 K, 10 cm molecule s and respectively, where the error 15.8 Ϯ 3.5; 20.9 Ϯ 3.1; 29.4 Ϯ 4.3; 14.7 Ϯ 2.6; 21.5 Ϯ 4.0, limits include the estimated overall uncertainties in the rate constants for the reference compounds. These OH radical reaction rate constants are higher than certain of the literature values, by up to a factor of 2. Rate constants were also measured for the reactions of 1-methoxy-2-propanol and 2-butoxyethanol with NO 3 radicals and O 3 , with respective NO 3 radical and O 3 reaction rate constants (in ) of: 1-methoxy-2-propanol,

cm molecule s units and and 2-butoxyethanol, and

(1.7 Ϯ 0.7) ϫ 10 , Ͻ1.1 ϫ 10 ;

(3.0 Ϯ 1.2) ϫ 10 , The dominant tropospheric loss process for the alcohols, glycols, and glycol Ϫ19 Ͻ1.1 ϫ 10 . ethers studied here is calculated to be by reaction with the OH radical, with lifetimes of 0.4-0.8 day for a average OH radical concentration of ᭧ 1998 John 6 Ϫ3 24 h 1.0 ϫ 10 molecule cm .