Activated Carbon For Gas Treatment

ctive carbon has always been a good candidate for gas phase cleaning, providing a unique combination of surface area, porous structure, and chemical versatility.

In the case of gas processing, the active carbon acts by absorbing the target molecular – VOCs (VOC), HSO, NH3, HG, PCDD/Fs, PCDD/Fs, and a wide variety of odour inducing compounds – on the vast inner surface of the PAC when the polluted air or gas flows are flowing across the carbon bed. The carbon can be applied either in a standardized format or mixed with a particular chemical to improve the elimination of a particular pollutant, e.g. acidic, mercury, or radioiodine, according to the application.

GAC has been applied in many fields such as industry emission control, urban air cleaning, solvent recycling, natural gas cleaning, and breathing protection. Performance is mainly controlled by pore size distribution, volume density, hardness, and — where applicable — impregnant type and loading level.

Choosing the right level requires that the carbon characteristics be carefully matched with a particular air flow component, flux, temperature, and humidity for every use. The correct selection will have a direct impact on the removal efficiency, the lifetime of the bed, and the total operation cost of the system.