High Temperature Reactions of CH₃ 1. The Reaction CH₃ + H₂ → CH₄ + H

Abstract

Abstract The rate coefficient of the reaction CH 3 + H 2 → CH 4 + H was determined at high temperatures behind incident shock waves by time‐resolved measurements of the absorption of the methyl radical at 216.5 nm. The resulting Arrhenius expression k 3 = 10 13.3±0.1 exp(−(7200 ± 400) K/ T ) cm 3 mol −1 s −1 is in good agreement with earlier indirect measurements. Several methyl radical sources are compared.