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Kinetics of the gas-phase reactions of β-phellandrene with OH and NO3 radicals and O3 at 297 ± 2 K

✍ Scribed by Basima Shorees; Roger Atkinson; Janet Arey

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
590 KB
Volume
23
Category
Article
ISSN
0538-8066

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✦ Synopsis

Rate constants for the gas-phase reactions of the biogenically emitted monoterpene p-phellandrene with OH and NO3 radicals and O3 have been measured at 297 f 2 K and atmospheric pressure of air using relative rate methods. The rate constants obtained were (in cm3 molecule-' s-' units): for reaction with the OH radical, (1.68 & 0.41) x lo-''; for reaction with the No3 radical, (7.96 f 2.82) x lo-''; and for reaction with 0 3 , (4.77 f 1.23) x where the error limits include the estimated uncertainties in the reference reaction rate constants. Using these rate constants, the lifetime of p-phellandrene in the lower troposphere due to reaction with these species is calculated to be in the range of ca. 1-8 h, with the OH radical reaction being expected to dominate over the 0 3 reaction as a loss process for p-phellandrene during daylight hours.

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