Accession Number : AD0768635

Title :   Catalytic Decomposition of the Fire Extinguishant Bromochlorodifluoro methane.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Musick,James K.

Report Date : 28 SEP 1973

Pagination or Media Count : 15

Abstract : A study was made of the action of hopcalite catalyst on bromochlorodifluoromethane (CBrClF2) at 600F, both as a single air contaminant and in the presence of carbon monoxide (CO) as a second contaminant. A bench-scale catalytic burner, which simulated the operating conditions used in the catalytic burners of nuclear submarines, was employed to expose the contaminants to the catalyst at concentrations of about 100 ppm. Less than 5% of the influent CBrClF2 was decomposed in passing through the burner. Free chlorine and/or bromine, hydrogen chloride and/or hydrogen bromide, and hydrogen fluoride were detected in the burner exhaust gas to confirm that a small amount of CBrClF2 did decompose. The activity of the catalyst for CBrClF2 was not affected by the presence of CO. The activity of the catalyst for CO was only slightly reduced by the presence of CBrClF2. (Modified author abstract)

Descriptors :   (*HALOGENATED HYDROCARBONS, DECOMPOSITION), CARBON MONOXIDE, PYROLYSIS, CATALYSTS, FIRE EXTINGUISHERS, BROMINE COMPOUNDS, FLUORINE COMPOUNDS, CHLORINE COMPOUNDS, COPPER COMPOUNDS, MANGANESE COMPOUNDS, OXIDES, THERMAL STABILITY

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE