Shock-tube and modeling study of acetylene pyrolysis and oxidation
- Ehime Univ., Matsuyama (Japan). Dept. of Chemistry
- National Defense Academy, Hashirimizu, Yokosuka (Japan). Dept. of Chemistry
Pyrolysis and oxidation of acetylene were studied behind reflected shock waves in the temperature range 1,100--2,000 K at pressures of 1.1--2.6 atm analyzing the reacted gas mixtures. The progress of the oxidation reaction was also observed with real-time spectroscopy. Main products in the pyrolysis with H{sub 2} or without H{sub 2} were vinylacetylene, diacetylene, and triacetylene. In the oxidation with fuel-rich mixtures, it was found that CO was the main product, and C{sub 1} and C{sub 3} carbon species appeared. The pyrolysis and oxidation of acetylene were modeled using a kinetic reaction mechanism, including the most recent mechanism for formaldehyde and ketene oxidations. The present and earlier shock tube data were reproduced by a proposed mechanism with 103 reaction steps and 38 species. It was found that reactions C{sub 2}H{sub 2} + O{sub 2} {yields} CHO + CHO or C{sub 2}H{sub 2} + O{sub 2} {yields} CHCO + OH and C{sub 2}H{sub 2} + CH{sub 2} {yields} C{sub 3}H{sub 4} were important to predict the data in a wide range of mixtures from acetylene pyrolysis to acetylene-lean oxidation.
- OSTI ID:
- 413493
- Journal Information:
- Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 4 Vol. 107; ISSN CBFMAO; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
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