Direct determination of atom and radical concentrations in thermal reactions of hydrocarbons and other gases. Progress report, December 1, 1981-December 31, 1982

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6538291

Skinner, G B; Rao, V S; Wood, D R

This is the seventh annual progress report on this project. During the period covered by the first six reports (June 1976 through December 1980) a shock tube and optical systems to measure H, D and O atom concentrations were built and fully characterized. The performance of our microwave discharge lamps were defined by numerous high-resolution spectroscopic profiles, while empirical calibrations were also made for all three of the above species. H, D and O atom concentrations were measured in gas mixtures containing H/sub 2/, D/sub 2/, O/sub 2/, CD/sub 4/, C/sub 2/H/sub 6/, C/sub 2/D/sub 6/, C/sub 3/H/sub 8/ and C/sub 3/D/sub 8/ in various proportions, and rate constants of several elementary reactions were deduced from the data. During the period covered by this report (December 1, 1981 to December 31, 1982) we have made kinetic modelling calculations to correlate H, D and O atom concentrations measured in shock-heated mixtures of C/sub 2/H/sub 6/-O/sub 2/-Ar, C/sub 2/D/sub 6/-O/sub 2/-Ar, C/sub 3/H/sub 8/-O/sub 2/-Ar and C/sub 3/D/sub 8/-O/sub 2/-Ar. These computations are difficult because there are several reactions for which rate constants are not known, so that it is necessary to do many calculations to completely optimize the results. Consequently, work is still going on with these calculations. We have completed an extensive series of measurements of H and D atom concentrations in pyrolysis experiments of benzene, toluene and neopentane and deuterium analogs, that have led to rate constants for the initial dissociation of these compounds, and for the reaction of H atoms with benzene and toluene.

• Research Organization: Wright State Univ., Dayton, OH (USA)
• DOE Contract Number: AC02-76ER02944
• OSTI ID: 6538291
• Report Number(s): DOE/ER/02944-7; ON: DE83006093
• Country of Publication: United States
• Language: English

Related Subjects

090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302 -- Organic Chemistry-- Isotope Effects-- (-1987)
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
ALKYL RADICALS
ARGON
AROMATICS
BENZENE
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
ETHANE
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
METHYL RADICALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PENTANE
PHYSICAL PROPERTIES
PROPANE
PYROLYSIS
RADICALS
RARE GASES
REACTION KINETICS
RESEARCH PROGRAMS
SHOCK TUBES
STABLE ISOTOPES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TOLUENE