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

    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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