Rate constant for the reaction H + NH/sub 3/ over the temperature range 750-1777 K
Conference
·
· J. Phys. Chem.; (United States)
OSTI ID:6038298
The rate constant for the reaction of atomic hydrogen with ammonia has been measured over the temperature range 908-1777 K by the flash photolysis-shock tube technique using atomic resonance absorption to monitor (H)/sub t/. The Arrhenius rate expression is k/sub 1/ = (3.02 +/- 0.30) x 10/sup -10/ exp(-8067 +/- 117/T) cm/sup 3/ molecule/sup -1/ s/sup -1/. The rate constant was also measured at 750 K by the flash photolysis-resonance fluorescence (FP-RF) method: k/sub 1/ = (1.27 +/- 0.18) x 10/sup -14/ cm/sup 3/ molecule /sup -1/ s/sup -1/. Detailed analysis of the kinetic data revealed that the Arrhenius plot is slightly nonlinear, and the shock tube data can be expressed by the three-parameter equation k/sub 1/ = 1.06 x 10/sup -18/T/sup 2.39 exp(-5119/T) cm/sup 3/ molecule/sup -1/ s/sup -1/. This result is compared to that from a theoretical calculation, k/sub 1/ = 1.16 x 10/sup -17/ T/sup 2.17 exp (-6268/T) cm/sup 3/ molecule/sup -1/ s/sup -1/ for 600 less than or equal to T less than or equal to 2600 K. Accepting the nonlinearity of the Arrhenius plot, the rate constant results from the two independent experimental techniques are in satisfactory agreement. 13 references, 2 figures, 3 tables.
- Research Organization:
- Brookhaven National Lab., Upton, NY
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6038298
- Conference Information:
- Journal Name: J. Phys. Chem.; (United States) Journal Volume: 90:3
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Thu Oct 23 00:00:00 EDT 1986
· J. Phys. Chem.; (United States)
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OSTI ID:7169848
Rate constant for the reaction of H with H/sub 2/O and OH with H/sub 2/ by the flash photolysis-shock tube technique over the temperature range 1246-2297 K
Journal Article
·
Thu Jun 30 00:00:00 EDT 1988
· J. Phys. Chem.; (United States)
·
OSTI ID:6480113
Rate constants for the reaction, O( sup 3 P) + H sub 2 O r equilibrium OH + OH, over the temperature range 1053K to 2033K using two direct techniques
Conference
·
Sun Dec 31 23:00:00 EST 1989
·
OSTI ID:6382038
Related Subjects
090310 -- Inorganic Hydrogen Compound Fuels-- Properties-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ABSORPTION
ABSORPTION SPECTROSCOPY
AMMONIA
ARRHENIUS EQUATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
MEETINGS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
REACTION KINETICS
RESONANCE ABSORPTION
SHOCK TUBES
SPECTROSCOPY
VERY HIGH TEMPERATURE
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ABSORPTION
ABSORPTION SPECTROSCOPY
AMMONIA
ARRHENIUS EQUATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
MEETINGS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
REACTION KINETICS
RESONANCE ABSORPTION
SHOCK TUBES
SPECTROSCOPY
VERY HIGH TEMPERATURE