Absolute rate constants for the reaction of hydroxyl radicals with ammonia from 297 to 364 K
Journal Article
·
· J. Phys. Chem.; (United States)
Absolute rate constants for the reaction OH + NH/sub 3/ ..-->.. NH/sub 2/ + H/sub 2/O were measured as a function of temperature from 297 to 364 K via the discharge flow technique with resonance fluorescence detection of OH. The rate constant was measured at five temperatures and fit to an Arrhenius expression to yield (4.55 +/- 1.1) x 10/sup -12/ exp((-973 +/- 78)/T) cm/sup 3/ molecule/sup -1/ s/sup -1/. A computer model of the experimental data was used to estimate rate constants for the exothermic reactions NH/sub 2/ + NO ..-->.. N/sub 2/ + H + OH and NH/sub 2/ + 2OH. The rate constant for quenching of OH(A/sup 2/..sigma../sup +/) at 297 K by ammonia was determined to be (9.6 +/- 0.8) x 10/sup -10/ cm/sup 3/ molecule/sup -1/ s/sup -1/. 35 references, 6 figures, 3 tables.
- Research Organization:
- General Motors Labs., Warren, MI
- OSTI ID:
- 5911666
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:15; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400500* -- Photochemistry
400600 -- Radiation Chemistry
AMMONIA
ARRHENIUS EQUATION
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
EMISSION SPECTROSCOPY
EQUATIONS
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
INFORMATION
KINETICS
MEDIUM TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
SPECTROSCOPY
SYNTHESIS
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400500* -- Photochemistry
400600 -- Radiation Chemistry
AMMONIA
ARRHENIUS EQUATION
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
EMISSION SPECTROSCOPY
EQUATIONS
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
INFORMATION
KINETICS
MEDIUM TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
SPECTROSCOPY
SYNTHESIS