There are commercially available units that
- compress the air
- dry the compressed air
- convert the hydrocarbons to carbon dioxide and water using a heated catalyst bed (known as a Zero Air generation)
Units like this are useful in providing the air quality required in a single, compact unit which can monitor the air quality and alarm if the air quality falls outside of specification.
The brochure of a type from IATT which is used at Owlstone is attached below.