Kinetic study of the reaction of OH with H/sub 2/ and D/sub 2/ from 250 to 1050/sup 0/K
Journal Article
·
· J. Phys. Chem.; (United States)
Absolute rate coefficients for the reactions OH + H/sub 2/ ..-->.. H/sub 2/O + H (k/sub 1/) and OH + D/sub 2/ ..-->.. DHO + D (k/sub 2/) have been measured between 250 and 1050/sup 0/K by using the flash photolysis-resonance fluorescence technique. The adaptation of the flash photolysis-resonance fluorescence technique to high-temperature studies is described. The measured values of k/sub 1/ and k/sub 2/ exhibit non-Arrhenius behavior. k/sub 1/ and k/sub 2/ are best described by three-parameter functions, k/sub 1/(T) = (4.12 x 10/sup -19/)T/sup 2/ /sup 44/ exp(-1281/T) cm/sup 3/ molecule/sup -1/ s/sup -1/ and k/sub 2/(T) = (4.37 x 10/sup -15/)T/sup 1/ /sup 18/ exp(-2332/T) cm/sup 3/ molecule/sup -1/ s/sup -1/ over the entire temperature range 250 to 1050/sup 0/K. Alternatively, at low temperatures k/sub 1/ and k/sub 2/ can be described by Arrhenius expressions, k/sub 1/(T) = (4.9 +- 0.5) x 10/sup -12/ exp(-(1.99 +- 0.34) x 10/sup 3//T) cm/sup 3/ molecule/sup -1/ s/sup -1/ for 250 < T < 400/sup 0/K and k/sub 2/(T) = 1.21 +- 0.52) x 10/sup -11/ exp(-(2.67 +- 0.15) x 10/sup 3//T) cm/sup 3/ molecule/sup -1/ s/sup -1/ for 250 < T < 470/sup 0/K. The results are compared with theoretical calculations based on an ab initio potential energy surface for reaction 1.
- Research Organization:
- Georgia Inst. of Tech., Atlanta
- OSTI ID:
- 6255674
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:17; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rate constant for the reaction H + NH/sub 3/ over the temperature range 750-1777 K
High-temperature photochemistry. Measurements of the rate coefficient for H + H/sub 2/O. -->. OH + H/sub 2/ from 1160 to 1390 K
Kinetics of OH reactions with the atmospheric sulfur compounds H/sub 2/S, CH/sub 3/SH, CH/sub 3/SCH/sub 3/, and CH/sub 3/SSCH/sub 3/
Conference
·
Wed Jan 29 23:00:00 EST 1986
· J. Phys. Chem.; (United States)
·
OSTI ID:6038298
High-temperature photochemistry. Measurements of the rate coefficient for H + H/sub 2/O. -->. OH + H/sub 2/ from 1160 to 1390 K
Journal Article
·
Wed Apr 25 23:00:00 EST 1984
· J. Phys. Chem.; (United States)
·
OSTI ID:6491544
Kinetics of OH reactions with the atmospheric sulfur compounds H/sub 2/S, CH/sub 3/SH, CH/sub 3/SCH/sub 3/, and CH/sub 3/SSCH/sub 3/
Journal Article
·
Thu Sep 03 00:00:00 EDT 1981
· J. Phys. Chem.; (United States)
·
OSTI ID:6269049
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
400500 -- Photochemistry
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DESIGN
DEUTERIUM
ELEMENTS
EQUIPMENT
FLUORESCENCE
HIGH TEMPERATURE
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXYL RADICALS
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
LOW TEMPERATURE
LUMINESCENCE
MEDIUM TEMPERATURE
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
RESONANCE
STABLE ISOTOPES
VERY HIGH TEMPERATURE
WATER
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
400500 -- Photochemistry
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DESIGN
DEUTERIUM
ELEMENTS
EQUIPMENT
FLUORESCENCE
HIGH TEMPERATURE
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXYL RADICALS
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
LOW TEMPERATURE
LUMINESCENCE
MEDIUM TEMPERATURE
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
RESONANCE
STABLE ISOTOPES
VERY HIGH TEMPERATURE
WATER