De-aromatization systems

These systems are mainly used to remove hydrogen sulfide, mercaptan and other odors that arise due to the storage and transportation of hydrocarbons.


Most often, these systems are used when working with fuel oil.

De-aromatization systems are also used in vapor recovery units to avoid hydrogen sulfide and mercaptan penetration into the carbon filters.

The operating principle of a de-aromatization system is simple. Hydrocarbon vapors containing hydrogen sulfide, mercaptan and other odors enter a container filled with a specific activated carbon. The activated carbon with its physicochemical characteristics traps and absorbs a large amount of adsorbate (hydrogen sulfide, mercaptan, etc.) on its surface. The rest of the air enters the atmosphere through the clean air pipe.

There can be different configurations of the de-aromatization systems:

  • Several tanks operating at the same time
  • Several tanks operating one after another or
  • A group of tanks

The carbon is replaced once the maximum level of vapor saturation in it is reached. It is not possible to regenerate a carbon saturating hydrogen sulfide and mercaptan vapors.