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Temperature dependence of phosphorus-based flame inhibition
An investigation of the inhibition properties of Phosphorus-Containing Compounds (PCCs) in moderately strained (global strain rate of 300 s(exp-1)) non-premixed methan-N2/O2/Ar flames is presented. The effect of DMMP [dimethyl methylphosphonate, O=P(OCH3)2(CH3)] on relative OH concentration profiles was measured by using quenching-corrected Lase-Induced Fluorescence (LIF) for the first time. LIF measurements indicate a reduction in the total OH present of 23 % for a non-premixed methane-air flame doped with 572 ppm of DMMP. As the stoichiometric adiabatic flame temperature is increased via substitution of Ar for N2 in the oxidizer stream, the measurements show a strong decrease in the magnitude of the OH reduction. Experimental results show reasonable agreement with computational predictions made using a kinetic model that has been proposed for DMMP decomposition and phosphorus remove H and O atoms form the readical pool, thus weakening the flame. These reactions produce OH directly, but the rest of the mechanism responds to O and H reductions by reducing OH levels. The key reactions involved in this inhibition process are identified.
Temperature dependence of phosphorus-based flame inhibition
An investigation of the inhibition properties of Phosphorus-Containing Compounds (PCCs) in moderately strained (global strain rate of 300 s(exp-1)) non-premixed methan-N2/O2/Ar flames is presented. The effect of DMMP [dimethyl methylphosphonate, O=P(OCH3)2(CH3)] on relative OH concentration profiles was measured by using quenching-corrected Lase-Induced Fluorescence (LIF) for the first time. LIF measurements indicate a reduction in the total OH present of 23 % for a non-premixed methane-air flame doped with 572 ppm of DMMP. As the stoichiometric adiabatic flame temperature is increased via substitution of Ar for N2 in the oxidizer stream, the measurements show a strong decrease in the magnitude of the OH reduction. Experimental results show reasonable agreement with computational predictions made using a kinetic model that has been proposed for DMMP decomposition and phosphorus remove H and O atoms form the readical pool, thus weakening the flame. These reactions produce OH directly, but the rest of the mechanism responds to O and H reductions by reducing OH levels. The key reactions involved in this inhibition process are identified.
Temperature dependence of phosphorus-based flame inhibition
Macdonald, M.A. (Autor:in) / Gouldin, F.C. (Autor:in) / Fisher, E.M. (Autor:in)
Combustion and Flame ; 124 ; 668-683
2001
16 Seiten, 13 Bilder, 55 Quellen
Aufsatz (Zeitschrift)
Englisch
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