Direct measurements of methoxy removal rate constants for collisions with CH/sub 4/, Ar, N/sub 2/, Xe, and CF/sub 4/ in the temperature range 673--973K
Conference
·
OSTI ID:6842465
Removal rate constants for CH/sub 3/O by CH/sub 4/, Ar, N/sub 2/, Xe, and CF/sub 4/ were measured over a 400K temperature range using a laser photolysis/laser-induced fluorescence technique. Rapid methoxy removal rates are observed for the non-reactive collision partners (Ar, N/sub 2/, Xe, and CF/sub 4/) at elevated temperatures showing that the dissociation and isomerization channels for CH/sub 3/O are indeed important. The total removal rate constant (reaction /plus/ dissociation and/or isomerization) for CH/sub 4/ exhibits a linear dependence on temperature and has a removal rate constant, k/sub r/ /equals/ (1.2 +- 0.6) /times/ 10/sup /minus/8/exp((/minus/101070 +- 350)/T)cm/sup 3/molecule/sup /minus/1/s/sup /minus/1/. Assuming that the removal rate constant due to dissociation and/or isomerization are similar for CH/sub 4/ and CF/sub 4/, the reaction rate constant for CH/sub 3/O /plus/ CH/sub 4/ is equal to (1.7 +- 1.0) /times/ 10/sup /minus/10/exp((/minus/7480 +- 1100)/T)cm/sup 3/molecule/sup /minus/1/s/sup /minus/1/. 7 refs., 4 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6842465
- Report Number(s):
- LA-UR-88-186; CONF-880802-3; ON: DE88005391
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
ALKANES
ALKOXY RADICALS
ARGON
ARRHENIUS EQUATION
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
EQUATIONS
FLUIDS
FLUORESCENCE
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
ISOMERIZATION
LASERS
LUMINESCENCE
METHANE
METHANOL
METHOXY RADICALS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
RARE GASES
REACTION INTERMEDIATES
SYNTHESIS
TEMPERATURE DEPENDENCE
XENON
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
ALKANES
ALKOXY RADICALS
ARGON
ARRHENIUS EQUATION
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
EQUATIONS
FLUIDS
FLUORESCENCE
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
ISOMERIZATION
LASERS
LUMINESCENCE
METHANE
METHANOL
METHOXY RADICALS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
RARE GASES
REACTION INTERMEDIATES
SYNTHESIS
TEMPERATURE DEPENDENCE
XENON