The rate constant for the HO2+HO2 reaction at elevated temperatures
1988; Elsevier BV; Volume: 150; Issue: 1-2 Linguagem: Inglês
10.1016/0009-2614(88)80407-x
ISSN1873-4448
AutoresPhilip Lightfoot, B. Veyret, Robert Lesclaux,
Tópico(s)Atmospheric Ozone and Climate
ResumoThe HO2+HO2 reaction has been studied at atmospheric pressure between 298 and 777 K, using a new high-temperature flash photolysis/UV kinetic spectroscopy apparatus. An upward curvature of the Arrhenius plot is observed at temperatures above 600 K, supporting a recent suggestion that - in addition to the well-established low-temperature association complex mechanism - a direct abstraction reaction with a positive activation energy operates at combustion temperatures. Arrhenius parameters for this direct reaction are estimated.
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