Shock tube kinetic study of the CH{sub 3} + H{sub 2} {r_equilibrium} H + CH{sub 4} reaction and the methane dissociation reaction
In this kinetic study of (1) the reaction of CH{sub 3} radicals with H{sub 2} and (2) the thermal dissociation of methane, primary product H atoms were monitored directly using the sensitive atomic resonance absorption detection technique. The detection limit for the [H] was about 3{times}10{sup 10} atoms cm{sup {minus}3}. Rate constants for both reactions were obtained under pseudo-first-order conditions. In addition, computer simulations verified that kinetic complications were avoided. For the reaction of CH{sub 3}+H{sub 2}, experiments were performed using either acetone or ethane to generate CH{sub 3} radicals rapidly by thermal dissociation in argon. Twenty-four experiments were performed over the temperature range 1346K to 1793K and a rate constant expression derived using linear least-squares analysis: k{sub {minus}2}(T) = (6.0{plus_minus}0.7){times}10{sup {minus}12} exp ({minus}5920{plus_minus}190K/T) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}. 46 refs., 5 figs., 5 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10120191
- Report Number(s):
- BNL-46958; CONF-920707-18; ON: DE92007180
- Resource Relation:
- Conference: 24. international symposium on combustion,Sydney (Australia),5-10 Jul 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
Similar Records
H + CH{sub 2}CO {yields} CH{sub 3} + CO at high temperature : a high pressure chemical activation reaction with positive barrier.
Kinetics of the reactions of C{sub 2}H with C{sub 2}H{sub 2}, H{sub 2}, and D{sub 2}
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
03 NATURAL GAS
METHANE
DISSOCIATION
CHEMICAL REACTION KINETICS
METHYL RADICALS
HYDROGEN
RADIATION ABSORPTION ANALYSIS
TEMPERATURE RANGE 1000-4000 K
ARRHENIUS EQUATION
400800
034000
COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY
COMBUSTION