Columnar activated carbon are usually made of anthracite. In furnace, these raw materials will react with carbon dioxide, oxygen and steam. And after a series of chemical reactions, activated carbon from furnace will be sent to extrusion equipment to be shaped into columns. With high strength, our columnar activated carbon is durable. And because of the small holes separated in it regularly, it can adsorb macro-molecules of odors, or other kinds of hazardous substances quickly in quantity. When it is exposed in air, or air currents blow through it, macro-molecules of poisonous gases will remain in these holes. This principle is also the reason why it is as carrier for many catalysts, and generally used in the chemical industry. Besides these, because of the character, it is also necessary to water purification, sewage treatment, or recycling of waste water from the boilers in power station.