High-temperature pyrolysis of ketene in shock waves
1994; Elsevier BV; Volume: 99; Issue: 1 Linguagem: Inglês
10.1016/0010-2180(94)90079-5
ISSN1556-2921
AutoresYoshiaki Hidaka, Ken‐ichi Kimura, Hiroyuki Kawano,
Tópico(s)Heat transfer and supercritical fluids
ResumoThe high temperature pyrolysis of ketene was studied behind reflected shock waves using both a time-resolved UV-absorption method (200 nm) and a single-pulse method (reaction time between 1.7 and 2.1 ms). The studies were done for the mixtures of 0.26% ketene and 2.2% ketene diluted with Ar in the temperature range 1102–1921 K at a total pressure range of 1.2–2.7 atm. From a computer-simulation study, a 38-reaction mechanism for the high temperature pyrolysis of ketene was developed. The mechanism and the rate-constant expressions were arrived at that could explain all our current data and previously reported data. It was found that the reactions 1–7 played a role in the ketene consumption. The rate constant expressions of the following six reactions except reaction 4 over the temperature range 1102–1921 K were estimated by using simulation. CH2CO + M → CH2 + CO + M, CH2CO + H → CH3 + CO, CH2CO + H → CHCO + H2, CH2CO + CH2 → C2H4 + CO, CH2CO + CH2 → CHCO + CH3, CH2CO + CH3 → C2H5 + CO, CH2CO + CH3 → CHCO + CH4,
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