Title

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

Authors

Authors

D. Healy; H. J. Curran; S. Dooley; J. M. Simmie; D. M. Kalitan; E. L. Petersen;G. Bourque

Comments

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Abbreviated Journal Title

Combust. Flame

Keywords

Natural gas; Oxidation; RCM; Shock tube; Experiments; Modeling; RAPID COMPRESSION MACHINE; OXYGEN-ARGON MIXTURES; GAS-TURBINE COMBUSTOR; REFLECTED SHOCK-WAVES; IGNITION DELAY TIMES; NATURAL-GAS; METHANE; PROPANE; AUTOIGNITION; Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical

Abstract

The oxidation of methane/propane Mixtures in "air" has been Studied for blends containing 90% CH(4)/10% C(3)H(8) and 70% CH(4)/30% C(3)H(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 stimulated 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 it 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. (C) 2008 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Journal Title

Combustion and Flame

Volume

155

Issue/Number

3

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

451

Last Page

461

WOS Identifier

WOS:000261458300014

ISSN

0010-2180

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