Hydrogen cyanide is liquid under standard conditions. It is easy to disperse evenly in the air and can burn in the air. When the content of hydrogen cyanide in the air reaches 5.6% to 12.8%, it is explosive. The adsorption method uses adsorbent to adsorb HCN gas to reduce the emission concentration of HCN and prevent its pollution. The most significant application is the adsorption of HCN by activated carbon. The exhaust gas from the spray absorption tower is discharged after being adsorbed by the activated carbon adsorbent.

With the special production technology, Kehuayuan activated carbon particles is the ideal way and have proved to have a better effect.