... Column Activated CarbonCoal columnar activated carbon is with the high quality anthracite fliter as the raw ... adsorbent, and it is widely used in the purification of gas, such as exhoust gas, poinious gas, industrial waste gas, etc ... materials.It can adsorb many kinds of smell and noxious gas, especially for CO (carbon monoxide), NH ( ... customers. Coal-based activated carbon with fine and useful purpose