Catalytic Decomposition of the Fire Extinguishant Bromochlorodifluoro methane.
NAVAL RESEARCH LAB WASHINGTON D C
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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 andor bromine, hydrogen chloride andor 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
- Organic Chemistry