EFFECTS OF AIR CONTAMINATION ON THE COMBUSTION OF HYDROGEN—EFFECT OF NO AND NO 2 ADDITION ON HYDROGEN IGNITION AND OXIDATION KINETICS

Abstract : New kinetic results for the oxidation of hydrogen in diluted conditions, perturbed by the addition of various concentrations of NO or NO2 were obtained in a jet-stirred reactor. The experiments were performed over the temperature range 700–1150 K, for pressures of 1 to 10 atm, and equivalence ratios from 0.1 to 2.5. The experiments were performed at fixed residence time, τ, and variable temperature. Sonic probe sampling at low pressure followed by on-line and off-line chemical analyses (gas chromatography and FTIR) were used to follow the reaction. A detailed kinetic modeling of the present experiments was performed using the proposed kinetic scheme. Further validations of this kinetic reaction mechanism were performed simulating the ignition of hydrogen-air and hydrogen-NOx-air mixtures, and the burning velocities of hydrogen-air mixtures. The present modeling results agreed well with the flame data and the ignition data of H2-air-NO mixtures but disagree with the mixtures containing NO2. The present results support the low literature value of the rate constant for the reaction of NO2 with H2 whereas a much higher rate constant is needed to fit the ignition delays of the H2-air-NO2 mixtures.
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https://hal.archives-ouvertes.fr/hal-02020332
Contributor : Philippe Dagaut <>
Submitted on : Friday, February 15, 2019 - 10:53:15 AM
Last modification on : Friday, April 19, 2019 - 3:24:55 PM

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Guillaume Dayma, Philippe Dagaut. EFFECTS OF AIR CONTAMINATION ON THE COMBUSTION OF HYDROGEN—EFFECT OF NO AND NO 2 ADDITION ON HYDROGEN IGNITION AND OXIDATION KINETICS. Combustion Science and Technology, Taylor & Francis, 2006, 178 (10-11), pp.1999-2024. ⟨10.1080/00102200600793171⟩. ⟨hal-02020332⟩

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