Gas phase media are used in dry scrubbing processes to remove air pollutants and odors from contaminated air/gas streams. They work on the principles of adsorption as well as chemisorption. During chemisorption, the media converts harmful gases from the air into harmless materials that are trapped inside the pellet. This process is instantaneous and irreversible.
They are produced in the form of porous pellets of spherical or cylindrical shape.