Rate Constants of CH4 + MCH3 + H + M and CH3OH + MCH3 + OH + M over 1400–2500 K

✍ Scribed by T. Koike; M. Kudo; I. Maeda; H. Yamada

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 79 KB
• Volume: 32
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/(sici)1097-4601(2000)32:1<1::aid-jck1>3.0.co;2-c

✦ Synopsis

Rate constant k 1 of CH 4 ϩ M " CH 3 ϩ H ϩ M was determined from time profiles of IR emission at 3.4 m obtained for a CH 4 /Ar mixture heated by incident shock waves at pressures 0.40-0.82 atm and temperatures 1400-2500 K. The emission decrease due to CH 4 decay in a very short period at the shockfront was investigated. Computer modeling for the decrease gave the k 1 value as: 3.0 ϫ 10 16 exp(Ϫ81.0 kcal/RT) cm 3 mol Ϫ1 s Ϫ1 . The k 1 value was almost the same as those reported by all authors except for the report by Klemm et al. The same technique was used for determining the rate constant k 2 of CH 3 OH ϩ M "CH 3 ϩ OH ϩ M and a new value was proposed as k 2 ϭ 4.2 ϫ 10 16 exp(Ϫ66.8 kcal/RT) cm 3 mol Ϫ1 s Ϫ1 .