Due to their role as ozone precursors and their toxicity, these compounds are causing serious environmental harm. For these reasons, current federal, state and local legislation sets out ever more restrictive limits on the emission of these compounds. Therefore, in industrial activities that are susceptible to generating VOC, emissions must be controlled and, when necessary, treated efficiently, with the use of VOC removal (or VOC abatement) systems.
What is a VOC Abatement System?
It is a system to combust, recover and refine Volatile Organic Compounds (VOCs) which are exhausted from facilities. Due to the usage of VOC abatement systems, VOCs in the targeted exhaust gases can be filtered or combusted and purified air can be released to the atmosphere.
In an adsorption process, the contaminated air or gas passes through an activated carbon bed where the contaminants are removed by adsorption or chemisorption and the treated gases are released into the atmosphere. The process of adsorption allows carbon air filters to filter organic chemicals (gases) from the air. The problem with the activated carbon bed is that over time, the gaseous pollutants increasingly fill up the activated carbon. Once the bed is saturated, the filter can no longer trap pollutants.
In fact, chemicals with a greater affinity for adsorption 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.
Therefore, as conditions change, different chemicals may be released from the filter.
The activated carbon bed gradually becomes saturated. What shall you do?
Change your carbon filter. Once the carbon becomes saturated, it loses all effectiveness as an air filter. The carbon becomes saturated depending on how heavily it is used and the amount of pollutants it is exposed to. It is imperative that you change it out for a fresh carbon filter when this happens and avoid VOC leakages and generate excess of emissions.