Methylperoxy self-reaction: Products and branching ratio between 223 and 333 K

Journal Article · Thu Oct 18 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100384a040· OSTI ID:6234143

Horie, O; Crowley, J N; Moortgat, G K ^[1]

---

1. Max-Planck Institute fuer Chemie, Mainz (West Germany)

Products from the Cl atom initiated oxidation of CH{sub 4} were analyzed by matrix isolation Fourier transform infrared spectroscopy (MI-FTIR) in order to determine the branching ratio k{sub 1a}k{sub 1} of the methylperoxy self-reaction: CH{sub 3}O{sub 2} + CH{sub 3}O{sub 2} {yields} CH{sub 3}O + CH{sub 3}O + O{sub 2} (1a); CH{sub 3}O{sub 2} + CH{sub 3}O{sub 2} {yields} HCHO + CH{sub 3}OH + O{sub 2} (1b); and CH{sub 3}O{sub 2} + CH{sub 3}O{sub 2} {yields} CH{sub 3}OOCH{sub 3} + O{sub 2} (1c). The value k{sub 1a}/k{sub 1} = k{sub 1a}/(k{sub 1a} + k{sub 1b} + k{sub 1c}) showed a pronounced temperature dependence in the range 223-333 K and is given by the relationship k{sub 1a}/k{sub 1} = 1/(1 + (exp(1,131 {plus minus} 30 T))/(19 {plus minus} 5)). These results are combined with previous measurements to make a recommendation for the temperature range 223-573 K; k{sub 1a}/k{sub 1} = 1/(1 + (exp(1,330 {plus minus} 120/T))/(33 {plus minus} 10)).

• OSTI ID: 6234143
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:21; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ALKANES
ATMOSPHERIC CHEMISTRY
BRANCHING RATIO
CHEMICAL REACTION KINETICS
CHEMISTRY
COMBUSTION PRODUCTS
HYDROCARBONS
INFRARED SPECTRA
KINETICS
LOW TEMPERATURE
MEDIUM TEMPERATURE
METHANE
ORGANIC COMPOUNDS
PEROXY RADICALS
RADICALS
REACTION KINETICS
SPECTRA
TEMPERATURE DEPENDENCE