Effect of Halogenated Flame Inhibitors on C1-C2 Organic Flames

Published

July 28, 1996

Author(s)

T Noto, Valeri I. Babushok, Donald R. Burgess Jr., Anthony P. Hamins, Wing Tsang, A W. Miziolek

Abstract

The influence of CF3Br, CF3I, CF4, CHF3, C2F6, and C2HF on laminar flame propagation in mixtures of CH4, CH3OH, C2H6, and C2H4 with air has been determined by numerical simulaitons. Comparisons are made with experimental results and earlier calculations. Flame velocities as a function of inhibitor concentration and equivalence ratio have been determined. For all the organic fuels, the ranking of inhibitive efficience is CF3Br, CF3I>C2F6>C3HF5>CHF3>CF4. The bromine and iodine compounds are clearly the ost efficient flame suppressants. They are of equal effectiveness except in methanol, where CF3I is superior. The retardants are more effective for rich mixtures than for lean. With 1% inhibitor concentration, the decrease in burning velocity is most pronounced for unsaturated fuels. The general ordering is consistent with calculational results on flame thickness and radical concentrations. Reaction pathway analysis demonstrates the importance of the regeneration of reactive scavengers. Relative contributions from physical and chemical effects are estimated.

Proceedings Title

Combustion Institute, Symposium (International) on Combustion, 26th. Proceedings. Volume 1.

Conference Dates

July 28-August 2, 1996

Pub Type

Conferences

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Keywords

combustion, flame extinguishment, flame propagation, kinetics, simulation, validation, burning velocity, temperature effects

Citation

Noto, T. , Babushok, V. , Burgess, D. , Hamins, A. , Tsang, W. and Miziolek, A. (1996), Effect of Halogenated Flame Inhibitors on C1-C2 Organic Flames, Combustion Institute, Symposium (International) on Combustion, 26th. Proceedings. Volume 1., -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909656 (Accessed January 15, 2025)