Low Pressure Flame Studies of Halon Replacement Combustion: Characterization of Byproducts and Formation Mechanisms

Abstract

This work seeks to characterize halon replacement combustion byproduct formation mechanisms and chemical kinetics. Experimental studies of inhibited, premixed, one-dimensional flames are described. Microprobe sampling mass spectrometer, Ihermocouple, and laser induced fluorescence diagnostics are used to measure temperature and chemical species conoentration profiles. The effects of 0.33% iodotrifluoromethane and 0.24% perfluoropropane on a 40.0 torr stoichiometric methane/air flame are investigated. Experimental results are compared 10 a premixed. one-dimensional, laminar flame model. The chemical kinetics model was developed independently of the experimental data and combines the GRI methane oxidation mechanism with a halogen reaction mechanism developed from previous work on CFJBr flame suppression by Westbrook (1983) and Babushok et al. (1994). The model predicts essentially complete combustion of the iodotrifluoromethane and perfluoropropane with hydrofluoric acid as the primary halogenated product. ...