Columnar activated carbon (also called extruded activated carbon, pellet activated carbon), is made from high quality coal or coconut shells by extrusion and its diameter ranges from 0.9 to 8 mm. Coconut shell pellet activated carbon with high quality coconut shell powder as raw material, is processed through the series production procedures. Appearance is black columnar, developed with gap, adsorption performance is good, high strength, easy regeneration, economic and durable, etc. Extruded carbon is suitable for removing various contaminants from air and air streams, such as H2S removal, siloxane, solvent recovery, air filters, industrial waste gas treatment, etc.