Resonance absorption measurements of atom concentrations in reacting gas mixtures. 5. Pyrolysis of C/sub 3/H/sub 8/ and C/sub 3/D/sub 8/ behind shock waves

Technical Report · Mon Jan 01 00:00:00 EST 1979

DOI:https://doi.org/10.2172/5738364· OSTI ID:5738364

Chiang, C.; Skinner, G. B.

Dilute mixtures (5-100 ppM) of C/sub 3/H/sub 8/ and of C/sub 3/D/sub 8/ in argon were pyrolyzed behind reflected shock waves at temperatures of 1200 to 1450/sup 0/K and total pressures of 2-3 atmospheres. Progress of the reaction was followed by analysis for H or D atoms using resonance absorption spectroscopy. Rate constants were determined as follows: C/sub 3/H/sub 8/ ..-->.. CH/sub 3/ + C/sub 2/H/sub 5/, k/sub 1/ = 2.5 x 10/sup 16/exp(-87,500/RT) s/sup -1/; C/sub 3/H/sub 8/ + Ar ..-->.. CH/sub 3/ + C/sub 2/H/sub 5/ + Ar, k/sub 1a/ = 2.6 x 10/sup 21/exp(-89,900/RT) mole/sup -1/ cm/sup 3/ s/sup -1/; where activation energies are in calories. Within experimental error, rate constants for the dissociation of C/sub 3/D/sub 8/ were the same. 2 figures, 2 tables.

• Research Organization: Wright State Univ., Dayton, OH (USA). Dept. of Chemistry
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-S-02-2944
• OSTI ID: 5738364
• Report Number(s): COO-2944-T1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DEUTERIUM COMPOUNDS
PYROLYSIS
PROPANE
ABSORPTION SPECTROSCOPY
ACTIVATION ENERGY
ARGON
CHEMICAL REACTION KINETICS
SHOCK WAVES
VERY HIGH TEMPERATURE
ALKANES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
ENERGY
HYDROCARBONS
HYDROGEN COMPOUNDS
KINETICS
NONMETALS
ORGANIC COMPOUNDS
RARE GASES
REACTION KINETICS
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
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