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A Kinetic Mechanism for CF3I Inhibition of Methane-Air Flames
V I Babushok1, D R Burgess1, G T Linteris1
1National Institute of Standards and Technology, Gaithersburg, MD.
Trifluoroiodomethane (CF3I) effectively inhibits methane-air flames, showing performance comparable to trifluorobromomethane (CF3Br). This study details its flame inhibition mechanisms through experiments and kinetic modeling.
Area of Science:
- Combustion Science
- Chemical Kinetics
- Flame Inhibition
Background:
- Methane-air flames are crucial in energy applications.
- Flame retardants are vital for safety and efficiency.
- Trifluoroiodomethane (CF3I) is a potential flame inhibitor.
Purpose of the Study:
- To experimentally and numerically investigate the influence of CF3I on methane-air flame burning velocity.
- To develop and validate a detailed kinetic model for CF3I flame inhibition.
- To compare the effectiveness of CF3I with CF3Br.
Main Methods:
- Experimental measurements of burning velocity.
- Development of a detailed kinetic model with 1072 reactions and 115 species.
- Numerical simulations of flame inhibition.
- Analysis of flame structure and key inhibition reactions.
Main Results:
- CF3I demonstrated inhibition effectiveness very close to CF3Br.
- Experimental and modeling results showed good agreement.
- CF3I was found to be only slightly less effective than CF3Br in reducing burning velocity.
Conclusions:
- CF3I is a highly effective flame inhibitor for methane-air flames.
- The developed kinetic model accurately predicts CF3I's inhibitory effects.
- CF3I presents a viable alternative to CF3Br for flame suppression applications.
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