Reaction of carbon monoxide with ozone: Kinetics and chemiluminescence

✍ Scribed by Sidney Toby; Elizabeth Ullrich

• Publisher: John Wiley and Sons
• Year: 1980
• Tongue: English
• Weight: 519 KB
• Volume: 12
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.550120804

✦ Synopsis

The reaction of carbon monoxide with ozone was studied in the range of 75-160OC in the presence of varying amounts of COZ and, for a few experiments, of 0 2 . At room temperature the reaction was immeasurably slow, but in a flow system it showed chemiluminescence with undamped oscillations. In a static system above 75°C the emission showed damped oscillations when 0 2 was present. In the absence of added 0 2 the emission showed a slow decay with a half-life of >1 hr. The luminescence consisted of partially resolved hands in the range of 325400 nm, and the source was identified as C02('&) -COz('Z:) + hv. The kinetics were complex, and the observed rate law could be accounted for by a mechanism involving the chain sequence O(3P) + CO(+M) 2 C02(3Bz) (+M), C02(3B2) + 0 3 3, COz(l2,+) + 0 2 + 0. From measurements of -d[Og]/dt and relative emission, rate constant ratios were obtained and estimates of k 3 were made.