APC Filtration Inc. is an ISO 9001:2015 certified manufacturer providing over 40 years experience in critical air filter design, engineering, manufacturing, filter testing and appliance/equipment integrity testing for global OEM’s of industrial, commercial and household equipment.

How do carbon air filters trap gaseous pollutants?

Activated carbon air filters remove pollutants from the air with a process known as adsorption, which is different from absorptionAd-sorption, allows VOCs to stick to the carbon, whereas ab-sorption allows pollutants to be absorbed inside the structure itself, like a sponge.

The process of adsorption allows carbon air filters to filter organic VOCs from the air. As VOCs fill up the adsorption sites of the activated carbon, the carbon bed becomes saturated and needs to be changed. In fact, chemicals with a greater affinity for an adsorption site can displace those with lesser affinity, and the affinity of a given chemical for the sorbent is highly dependent on ambient conditions such as temperature and relative humidity. As environmental conditions change, different chemicals may be released from the filter. When a carbon air filter is saturated, it will give off a strange odor. This is a strong indicator it’s time to change your carbon filter.

Gas purification

Impregnated activated carbon is used to treat flue gases in coal-fired generation plants and other air pollution control applications. Carbon can be specifically impregnated for removal of acid gases, ammonia and amines, aldehydes, radio-active iodine, mercury and inorganic gases such as arsine and phosphine. Carbon impregnated with metal-oxide targets inorganic gases including HCN, H2S, phosphine and arsine.


Types of Carbon Air Filters

APC provides custom designed carbon air filters for each OEM’s specific requirement, equipment or device.

  • Panel Filters with honeycomb encased granular activated carbon (GAC)
  • Panel and Radial Filters with pleated carbon media