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Experimental and Modeling Study of the Kinetics of Oxidation of Simple Biodiesel−Biobutanol Surrogates: Methyl Octanoate−Butanol Mixtures

Abstract : There is growing interest for using butanol−biodiesel fuel blends in diesel engines, but neither kinetic data nor kinetic models were available for simulating their combustion. Therefore, the kinetics of oxidation of a biodiesel−biobutanol surrogate fuel (methyl octanoate−1-butanol) was studied experimentally in a jet-stirred reactor (JSR) at 10 atm, at a constant mean residence time of 0.7 s, over the temperature range 560−1190 K, and for several equivalence ratios ranging from 0.5 to 2. Concentration profiles of reactants, stable intermediates, and final products were determined as a function of temperature, by low-pressure sonic probe sampling followed by online Fourier transform infrared spectrometry (FTIR), and off-line gas chromatography (GC) analyses with thermal conductivity (TCD), flame ionization (FID), and mass spectrometry (MS) detection. The oxidation of this fuel in the aforementioned conditions was modeled using a detailed chemical kinetic reaction mechanism consisting of 4545 reactions and 1098 species. The proposed kinetic reaction mechanism generally yielded a good representation of the kinetics of oxidation of this biodiesel−biobutanol surrogate under the present conditions. The kinetic modeling was used to delineate the reactions enhancing the low-temperature oxidation of 1-butanol, important for diesel and HCCI engine applications. The present results also indicated that the methyl octanoate−1-butanol mixtures are less prone to emitting acetaldehyde than the corresponding methyl octanoate−ethanol mixtures oxidized in a JSR.
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https://hal.archives-ouvertes.fr/hal-02020267
Contributor : Philippe Dagaut <>
Submitted on : Friday, February 15, 2019 - 10:26:35 AM
Last modification on : Thursday, April 18, 2019 - 9:50:02 AM

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C. Togbé, G. Dayma, A. Mzé-Ahmed, P. Dagaut. Experimental and Modeling Study of the Kinetics of Oxidation of Simple Biodiesel−Biobutanol Surrogates: Methyl Octanoate−Butanol Mixtures. Energy and Fuels, American Chemical Society, 2010, 24 (7), pp.3906-3916. ⟨10.1021/ef100484q⟩. ⟨hal-02020267⟩

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