High temperature rate coefficient for the reaction of O(/sup 3/P) with H/sub 2/ obtained by the resonance absorption of O and H atoms
Journal Article
·
· Combust. Flame; (United States)
The reaction of O(/sup 3/P) with H/sub 2/ has been studied behind reflected shock waves in the temperature range of 1713-3532K at total pressures of about 1.4-2.0 bar by Atomic Resonance Absorption Spectroscopy using mixtures of N/sub 2/O and H/sub 2/ highly diluted in Ar. The O atoms were generated by the fast thermal decomposition of N/sub 2/O and the reaction with H/sub 2/ was followed by monitoring the time dependent O and H atom concentrations in the postshock reaction zone. For the experimental conditions chosen, the measured O and H atom concentrations were primarily sensitive to the well-known N/sub 2/O dissociation and to the studied reaction and hence its rate coefficient could be deduced. The measured rate coefficient data are fitted by the least-squares method to obtain the following three parameter expression: kappa/sub 4/ = 3.72 x 10/sup 6/(T/K)/sup 2.17/ exp(-4080 K/T) cm/sup 3/ mol/sup -1/ s/sup -1/, which is an excellent agreement with the recent ab inito calculations for the rate coefficient of this reaction in the overlapping temperature range. The present result is also compared to the experimental results reported by earlier investigators.
- Research Organization:
- Fachgebiet Verbrennung und Gasdynamik, Universitat Duisburg, 4100 Duisburg
- OSTI ID:
- 5612588
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 70:3; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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Wed Nov 30 23:00:00 EST 1994
· Combustion and Flame; (United States)
·
OSTI ID:6798797
Resonance absorption measurements of atom concentrations in reacting gas mixtures. VIII. Rate constants for O+H/sub 2/. -->. OH+H and O+D/sub 2/. -->. OD+D from measurements of O atoms in oxidation of H/sub 2/ and D/sub 2/ by N/sub 2/O
Journal Article
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Thu Dec 31 23:00:00 EST 1981
· J. Chem. Phys.; (United States)
·
OSTI ID:5936001
High-temperature photochemistry and BAC-MP4 studies of the reaction between ground-state H atoms and N/sub 2/O
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ARGON
CHALCOGENIDES
CHEMICAL REACTION KINETICS
DISPERSIONS
DISSOCIATION
ELEMENTS
FLUIDS
GASES
HYDROGEN
KINETICS
LEAST SQUARE FIT
MASS SPECTROSCOPY
MAXIMUM-LIKELIHOOD FIT
MEDIUM PRESSURE
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
NUMERICAL SOLUTION
OXIDES
OXYGEN COMPOUNDS
RARE GASES
REACTION KINETICS
RESONANCE IONIZATION MASS SPECTROSCOPY
SHOCK WAVES
SOLUTES
SPECTROSCOPY
THERMAL DEGRADATION
THERMODYNAMICS
VERY HIGH TEMPERATURE
400201* -- Chemical & Physicochemical Properties
ARGON
CHALCOGENIDES
CHEMICAL REACTION KINETICS
DISPERSIONS
DISSOCIATION
ELEMENTS
FLUIDS
GASES
HYDROGEN
KINETICS
LEAST SQUARE FIT
MASS SPECTROSCOPY
MAXIMUM-LIKELIHOOD FIT
MEDIUM PRESSURE
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
NUMERICAL SOLUTION
OXIDES
OXYGEN COMPOUNDS
RARE GASES
REACTION KINETICS
RESONANCE IONIZATION MASS SPECTROSCOPY
SHOCK WAVES
SOLUTES
SPECTROSCOPY
THERMAL DEGRADATION
THERMODYNAMICS
VERY HIGH TEMPERATURE