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Chemical Flame Inhibition Using Molecular Beam Mass Spectrometry. Bromotrifluoromethane in Low Pressure Methane-oxygen-argon Flames.

Authors
Biordi-JC; Lazzara-CP; Papp-JF
Source
NTIS: PB 218 697 :39 pages
Link
NIOSHTIC No.
10000461
Abstract
A molecular beam-mass spectrometer-low pressure flat flame apparatus has been constructed for the purpose of examining the chemical microstructure of normal methane-oxygen-argon flames and those inhibited with halon extinguishants. The composition profiles obtained for normal flames are compared to those of flames inhibited by cf3br. In addition to the unusual stable species (ch4, o2, CO, co2, h2o, h2, and h2co), the inhibitor, its products and intermediates associated with its reactions could be followed. In particular, hydrogen bromide, bromine atoms, hydrogen fluoride, and carbonyl fluoride were observed. The relatively rapid disappearance of inhibitor and early appearance of fluorinated reaction products suggest a short lifetime for the cf3 radical in this syste ob observation of cof2 suggests that cf3br is effective as an inhibitor, at least in part, by virtue of its interference with the oxygen containing species of the normal chain reaction.
Publication Date
19730101
Document Type
IH; Report of Investigations
Fiscal Year
1973
NTIS Accession No.
PB-218697
NTIS Price
A04
Identifying No.
RI 7723
NIOSH Division
PRC;
Source Name
NTIS: PB 218 697
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