Shock-tube study of CH[sub 2]O pyrolysis and oxidation

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(93)90149-W· OSTI ID:6442073

Hidaka, Yoshiaki; Taniguchi, Takashi; Tanaka, Hiroya; Kamesawa, Takashi; Inami, Koji; Kawano, Hiroyuki ^[1]

---

1. Ehime Univ., Matsuyama (Japan)

Pyrolysis and oxidation of formaldehyde were studied behind reflected shock waves in the temperature range 1,160-1,890 K at total pressures between 1.4 and 2.5 atm. Formaldehyde decay was followed by using time-resolved IR-laser absorption and IR-emission. The consumption of CH[sub 2]O was promoted by addition of O[sub 2] and the increase in CH[sub 2]O concentration also brought about a promotion of the CH[sub 2]O consumption in the oxidation reaction. A mechanism that can explain the profiles obtained under the experimental conditions was examined by simulation. The present and earlier shock tube data were satisfactorily modeled with a 34-reaction mechanism. The CH[sub 2]O decay rate was very sensitive to the rate constants of the reactions 6, 9, and 25, shown below. Reaction 9 played a very important role in the CH[sub 2]O oxidation under the experimental conditions. New values of the rate constants of these reactions were derived. Reaction 6= CH[sub 2]O + O[sub 2] [r arrow] CHO + HO[sub 2]; Reaction 9= CH[sub 2]O + HO[sub 2] [r arrow] CHO + H[sub 2]O[sub 2]; and Reaction 25= H + HO[sub 2] [r arrow] H[sub 2] + O[sub 2].

• OSTI ID: 6442073
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 92:4; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ABSORPTION SPECTROSCOPY
ALDEHYDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
FORMALDEHYDE
HYDROCARBONS
INFRARED RADIATION
KINETICS
MATHEMATICAL MODELS
MEDIUM PRESSURE
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
PYROLYSIS
RADIATIONS
REACTION INTERMEDIATES
REACTION KINETICS
SHOCK TUBES
SPECTROSCOPY
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
THERMOCHEMICAL PROCESSES