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Title
Temperature dependence of phosphorus-based flame inhibition
Author:
MacDonald, MA; Gouldin, FC; Fisher, EM;
Addresses:
Cornell Univ, Sibley Sch Mech & Aerosp Engn, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 Mech & Aerosp Engn, Ithaca, NY 14853 USA
Heading Title:
COMBUSTION AND FLAME
issue: 4, volume: 124, year: 2001,
pages: 668 - 683
SICI:
0010-2180(200103)124:4<668:TDOPFI>2.0.ZU;2-H
Source:
ISI
Language:
ENG
Subject:
COUNTERFLOW DIFFUSION FLAMES; LASER-INDUCED-FLUORESCENCE; VIBRATIONAL-ENERGY TRANSFER; METHANE-AIR; ATMOSPHERIC-PRESSURE; IRON PENTACARBONYL; OH; LAMINAR; FLUOROMETHANES; RECOMBINATION;
Document Type:
Article
Nature:
Serial
Edition:
Engineering, Computing & Technology
Citations:
54
Reviewed:
Addresses for extracts:
Address: Fisher, EM Cornell Univ, Sibley Sch Mech & Aerosp Engn, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 sp Engn, Ithaca, NY 14853 USA
Citation:
M.A. MacDonald and others, "Temperature dependence of phosphorus-based flame inhibition", COMB FLAME, 124(4), 2001, pp. 668-683

Abstract

An investigation of the inhibition properties of Phosphorus-Containing Compounds (PCCs) in moderately strained (global strain rate of 300 s(-1)) non-premixed methane-N-2/O-2/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 Laser-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 N-2 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-radical chemistry. Analysis of the computational results shows that the reactions involving phosphorus remove H and O atoms from the radical 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. (C) 2001 by The Combustion Institute.

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Document created on 29/09/20 at 07:41:50