Methane/propane mixture oxidation at high pressures and at high, intermediate and low temperatures

The oxidation of methane/propane mixtures in “air” has been studied for blends containing 90% CH 4/10% C 3H 8 and 70% CH 4/30% C 3H 8 in the temperature range 740–1550 K, at compressed gas pressures of 10, 20 and 30 atm, and at varying equivalence ratios of 0.3, 0.5, 1.0, 2.0 and 3.0 in a high-press...

Full description

Saved in:
Bibliographic Details
Published in:Combustion and flame 2008-11, Vol.155 (3), p.451-461
Main Authors: Healy, D., Curran, H.J., Dooley, S., Simmie, J.M., Kalitan, D.M., Petersen, E.L., Bourque, G.
Format: Article
Language:English
Subjects:
Applied sciences
Blends
Combustion
Combustion of gaseous fuels
Combustion. Flame
Energy
Energy. Thermal use of fuels
Equivalence ratio
Exact sciences and technology
Experiments
Fuels
Mathematical models
Methane
Modeling
Natural gas
Oxidation
Propane
RCM
Shock tube
Theoretical studies. Data and constants. Metering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The oxidation of methane/propane mixtures in “air” has been studied for blends containing 90% CH 4/10% C 3H 8 and 70% CH 4/30% C 3H 8 in the temperature range 740–1550 K, at compressed gas pressures of 10, 20 and 30 atm, and at varying equivalence ratios of 0.3, 0.5, 1.0, 2.0 and 3.0 in a high-pressure shock tube and in a rapid compression machine. These data are consistent with other experiments presented in the literature for other alkane fuels in that, when ignition delay times are plotted as a function of temperature, a characteristic negative coefficient behavior is observed, particularly for mixtures containing 30% propane. In addition, the results were simulated using a detailed chemical kinetic model. It was found that qualitatively, the model reproduces correctly the effect of change in equivalence ratio and pressure, predicting that fuel-rich, high-pressure mixtures ignite fastest while fuel-lean, low-pressure mixtures ignite slowest. Moreover, the reactivity as a function of temperature is well captured with the model predicting negative temperature coefficient behavior similar to the experiments. Quantitatively the model is faster than experiment for all mixtures at the lowest temperatures (740–950 K) and is also faster than experiment throughout the entire temperature range for fuel rich mixtures.
ISSN:0010-2180
1556-2921
DOI:10.1016/j.combustflame.2008.06.008