A detailed experimental study of n -propylcyclohexane autoignition in lean conditions

The autoignition chemistry of lean n-propylcyclohexane/“air” mixtures ( ϕ = 0.3, 0.4, 0.5) was investigated in a rapid compression machine at compressed gas temperatures ranging from 620 to 930 K and pressures ranging from 0.45 to 1.34 MPa. Cool flame and ignition delay times were measured. Cool fla...

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Bibliographic Details
Published in:Combustion and flame 2010-11, Vol.157 (11), p.2078-2085
Main Authors: Crochet, M., Minetti, R., Ribaucour, M., Vanhove, G.
Format: Article
Language:English
Subjects:
AIR
ALKENES
Applied sciences
AUTOIGNITION
Combustion
COMBUSTION KINETICS
Combustion. Flame
Compressed gas
COMPRESSION
CORRELATIONS
CYCLOALKANES
Delay
DIESEL FUELS
Diesel surrogate
Diesel surrogates
Energy
Energy. Thermal use of fuels
Engineering Sciences
ETHERS
Exact sciences and technology
EXPERIMENTAL DATA
FLAMES
Ignition
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MIXTURES
n-Propylcyclohexane
OXIDATION
PRESSURE RANGE KILO PA
PRESSURE RANGE MEGA PA 01-10
Rapid compression machine
Rapid compression machines
SIMULATION
TEMPERATURE COEFFICIENT
TEMPERATURE RANGE 0400-1000 K
Theoretical studies. Data and constants. Metering
TIME DELAY
ZONES
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Summary:The autoignition chemistry of lean n-propylcyclohexane/“air” mixtures ( ϕ = 0.3, 0.4, 0.5) was investigated in a rapid compression machine at compressed gas temperatures ranging from 620 to 930 K and pressures ranging from 0.45 to 1.34 MPa. Cool flame and ignition delay times were measured. Cool flame delay times were found to follow an Arrhenius behavior, and a correlation including pressure and equivalence ratio dependences was deduced. The present ignition delay data were compared with recent experimental results and simulations from the available thermokinetic models in the literature. Negative temperature coefficient zones were observed when plotting ignition delay times versus compressed gas temperature. The oxidation products were identified and quantified during the ignition delay period. Formation pathways for the C 9 bicyclic ethers and conjugate alkenes are proposed. The experimental data provide an extensive database to test detailed thermokinetic oxidation models.
ISSN:0010-2180
1556-2921
DOI:10.1016/j.combustflame.2010.04.012