At present, the activation methods for activated carbon production are mainly divided into two categories, namely: physical activation method and chemical activation method. The physical method is to first put the raw materials (high-quality coal, fruit shells, charcoal, etc.) in a closed furnace body for smoldering and carbonization, and then introduce an appropriate amount of water vapor to activate and produce activated carbon. The chemical method is to first impregnate the raw materials (usually sawdust) with chemical agents (phosphoric acid, zinc chloride, etc.), and then carbonize and activate them in a furnace body with air circulation to produce activated carbon. At present, many manufacturers use physical methods to produce activated carbon.
