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Pulse radiolysis study of the reaction of OH radicals with C2H4 over the temperature range 343–1173 K

✍ Scribed by An-Dong Liu; William A. Mulac; Charles D. Jonah

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
526 KB
Volume
19
Category
Article
ISSN
0538-8066

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✦ Synopsis

The reaction of OH and OD radicals with ethylene in the presence of 1 atm argon and 6 Torr water vapor was studied in the temperature range 343-1173 K. The results reveal three kinetically separate temperature regions: (1) 343-563 K, where the disappearance o f OH radical is dominated by the addition of OH to the double bond of ethylene; (2) 563-748 K, where concurrent reactions of addition, the reverse reaction of addition and H-atom abstraction is dominant; and (3) 748-1173 K, where H-atom abstraction is Iikely the main reaction. The rate for hydrogen abstraction is 2.4 x 10-l' exp[(-2104 ? 125)/T] cm'/molec-s (for OD 2.1 X 10 " exp[(-2130 ? 172)/T] cm'/ molec-s). There was no obvious pyrolysis of ethylene below 1073 K. The study of OD radical with ethylene shows a small isotope effect.

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