Apparatus for the treatment of air
AssigneeJohnson Matthey Public Limited Company
InventorsStephen Poulston, Andrew William John Smith, Stephen Charles Bennett, Elizabeth Rowsell
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Abstract
A gas treatment apparatus, suitable for use in an air purifying apparatus for the production of breathable air, includes a catalyst including palladium and iron oxide and a source of a volatile nitrogen-containing compound. The apparatus is useful in gas masks, emergency escape hoods and static air treatment apparatus.
Claims20
An apparatus for the treatment of air, wherein air having a first concentration of carbon monoxide enters the apparatus and breathable air having a second concentration of carbon monoxide exits the apparatus, said first concentration being higher than said second concentration, the apparatus comprising a gas treatment means, comprising:
- i) a catalyst for the oxidation of carbon monoxide comprising palladium and iron oxide and
- ii) a source of a volatile nitrogen-containing compound.
A method of treating air to form breathable air comprising the step of passing a stream of air containing a first concentration of carbon monoxide through a gas treatment means comprising:
- i) a catalyst for the oxidation of carbon monoxide comprising palladium and iron oxide and
- ii) a source of a volatile nitrogen-containing compound such that at least a portion of carbon monoxide contained in said air is oxidised and that the air downstream of said gas treatment means contains a second concentration of carbon monoxide which is less than said first concentration.
A method of treating air to form breathable air comprising the step of contacting a stream of air containing a first concentration of carbon monoxide with a catalyst for the oxidation of carbon monoxide comprising palladium and iron oxide such that at least a portion of carbon monoxide contained in said air is oxidised and that the air downstream of said gas treatment means contains a second concentration of carbon monoxide which is less than said first concentration, wherein said air is also brought into contact with a volatile nitrogen-containing compound.
Dependencies are inferred from the claim text.