Hopcalite

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Hopcalite is a catalyst that is primarily used for the oxidation of carbon monoxide (CO) to carbon dioxide (CO₂) at room temperature. It is a mixture of manganese dioxide (MnO₂) and copper oxide (CuO), and sometimes includes other metal oxides such as cobalt oxide (Co₃O₄) and silver oxide (Ag₂O).

History

Hopcalite was first developed in the early 20th century by the United States Bureau of Mines as a means to protect miners from carbon monoxide poisoning. The name "Hopcalite" is derived from the names of the researchers who developed it: H. S. Houghton and H. A. Calvert.

Composition and Properties

Hopcalite typically consists of a mixture of 50-70% manganese dioxide and 30-50% copper oxide. The exact composition can vary depending on the specific application and desired properties. The catalyst is highly effective at room temperature, making it suitable for use in various safety and industrial applications.

Applications

Safety Equipment

Hopcalite is widely used in respirators and gas masks to protect against carbon monoxide poisoning. It is also used in self-rescue devices for miners and other workers who may be exposed to carbon monoxide.

Industrial Uses

In industrial settings, Hopcalite is used in gas purification systems to remove carbon monoxide from air streams. It is also employed in automotive and aerospace applications to ensure the safety of passengers and crew by eliminating carbon monoxide from the cabin air.

Mechanism of Action

The catalytic action of Hopcalite involves the adsorption of carbon monoxide onto the surface of the catalyst, followed by its oxidation to carbon dioxide. This reaction occurs at room temperature, making Hopcalite an efficient and practical solution for carbon monoxide removal.

Related Pages

• Catalyst
• Carbon monoxide
• Manganese dioxide
• Copper oxide
• Respirator
• Gas mask
• Gas purification

See Also

• Catalysis
• Oxidation
• Safety equipment
• Industrial safety

External Links

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