Journal of the Chemical Society - Faraday Transactions p. 2211 - 2222 (1996)
Update date:2022-08-16
Topics:
Canosa-Mas, Carlos E.
King, Martin D.
Lopez, Reyes
Percival, Carl J.
Wayne, Richard P.
Shallcross, Dudley E.
Pyle, John A.
Daele, Veronique
A discharge-flow system equipped with a laser-induced fluorescence (LIF) cell to detect NO2 and a multi-pass absorption cell to detect NO3 has been used to study the reaction CH3C(O)O2 + NO3 → CH3C(O)O + NO2 + O2 (1) at T = 403-443 K and P = 2-2.4 Torr. The rate constant was found to be independent of temperature with a value of k1 = (4 ± 1) × 10-12 cm3 molecule-1 s-1. The likely mechanism for the reaction is discussed. The atmospheric implications of reaction (1) are investigated using a range of models and several case studies are presented, comparing model results with actual field measurements. It is concluded that reaction (1) participates in a cycle which can generate OH at night. This reaction cycle (see text) can operate throughout the continental boundary layer, but may even occur in remote regions.
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