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A product study of the gas-phase reaction of Isoprene with the OH radical in the presence of NOx

✍ Scribed by Ernesto C. Tuazon; Roger Atkinson

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 803 KB
Volume: 22
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550221202

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✦ Synopsis

The gas-phase reaction of isoprene with the OH radical, in the presence of NO,, was investigated at 298 2 2 K and atmospheric pressure of air by long pathlength FT-IR spectroscopy. The primary products identified and their formation yields were: methacrolein, 0.22 2 0.05; methyl vinyl ketone, 0.29 2 0.07; and HCHO, with the observed yield being consistent with the sum of the methacrolein and methyl vinyl ketone yields. Combined with the previously reported yield of 0.044 +. 0.006 for 3-rnethylfuran, these products accounted for 55 ? WO of the isoprene which reacted. Under conditions where the dark reaction of isoprene with NO2 is not significant, the balance of the isoprene consumed could possibly be accounted for by the "organic nitrates" and "other carbonyl compounds" formed in estimated overall yields of ca. 12% and ca. 25%, respectively.

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