Hopcalite
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Hopcalite is a mixture of copper and manganese oxides used as catalyst to convert carbon monoxide into carbon dioxide when exposed to the oxygen in air. Commercial products vary in composition, however a common ratio is approximately 3:1 manganese dioxide : copper oxide.
[edit] Common Applications
One of the most common uses of Hopcalite-type mixtures is in air filtrations systems used to purify breathing air supplies, for example those utilised in scuba diving and firefighting. Although primarily used to catalyse the conversion of carbon monoxide to carbon dioxide, Hopcalite is also used to remove ethylene oxide, VOCs and ozone in various situations. Hopcalite is also used as the main filtration ingredient in the self rescue aspirators issued to miners. Carbon Monoxide is not removed by activated charcoal air filters.[1]
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