Rate constant for the reaction of O(/sup 3/P) with H/sub 2/ by the flash photolysis-shock tube and flash photolysis-resonance fluorescence techniques; 504K less than or equal to T less than or equal to 2495K
The rate constant for the reaction, O(/sup 3/P) + H/sub 2/ ..-->.. OH + H, was measured over the temperature range of 504 K to 2495 K by two independent experimental methods. The flash photolysis-shock tube (FP-ST) technique, combined with atomic resonance absorption spectroscopy (ABAS), was used over the temperature range 880K to 2495K. The results from the FP-ST work, expressed in simple Arrhenius form are included. The flash photolysis-resonance fluorescence (FP-RF) technique was utilized to measure rate constants from 504 K to 923 K. Results from the FP-RF experiments, also expressed in simple Arrhenius form are included. These kinetic results for the reaction of O(/sup 3/P) with H/sub 2/ exhibit non-Arrhenius behavior. This conclusion is confirmed by the recent kinetic data of Presser and Gordon (297K less than or equal to T less than or equal to 471K). The combined results from these three data sets are expressed by three parameter fit. The estimated error in this expression is about +-30% over the entire temperature range, 297K to 2495K. Rate constants for reaction (1) from recent ab initio calculations are in excellent agreement with these experimental results. 49 refs., 3 figs., 3 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA). Applied Science Dept.
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5263761
- Report Number(s):
- BNL-38238; CONF-860804-11; ON: DE86013335
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400500* -- Photochemistry
ARRHENIUS EQUATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
FLUORESCENCE
HIGH TEMPERATURE
HYDROGEN
INFORMATION
KINETICS
LUMINESCENCE
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
REACTION KINETICS
RESONANCE FLUORESCENCE
SHOCK TUBES
VERY HIGH TEMPERATURE