Activated carbon production includes two processes: carbonization and activation. Carbonization is the process of heating coal, wood, fruit shells, coconut shells, walnut shells, etc. in an airtight manner to separate out moisture and decompose gas to obtain carbonized products. Activation is the process in which the carbon element in the carbonized product reacts with the activator to form activated carbon with a complex pore structure and a developed specific surface area. The key process in manufacturing activated carbon is activation. Due to the different activators used, it can be divided into two methods: gas activation and chemical activation. The gas activation method is simple in process, and coal-based activated carbon is suitable for the gas activation method; the chemical activation method is complex in process.
