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Kinetics of the gas‐phase reactions of β‐phellandrene with OH and NO 3 radicals and O 3 at 297 ± 2 K
Author(s) -
Shorees Basima,
Atkinson Roger,
Arey Janet
Publication year - 1991
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550231005
Subject(s) - chemistry , radical , reaction rate constant , kinetics , gas phase , atmospheric temperature range , reaction rate , analytical chemistry (journal) , thermodynamics , organic chemistry , catalysis , physics , quantum mechanics
Rate constants for the gas‐phase reactions of the biogenically emitted monoterpene β‐phellandrene with OH and NO 3 radicals and O 3 have been measured at 297 ± 2 K and atmospheric pressure of air using relative rate methods. The rate constants obtained were (in cm 3 molecule −1 s −1 units): for reaction with the OH radical, (1.68 ± 0.41) × 10 −10 ; for reaction with the NO 3 radical, (7.96 ± 2.82) × 10 −12 ; and for reaction with O 3 , (4.77 ± 1.23) × 10 −17 , where the error limits include the estimated uncertainties in the reference reaction rate constants. Using these rate constants, the lifetime of β‐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 O 3 reaction as a loss process for β‐phellandrene during daylight hours.