activated carbonIt is a specially treated charcoal that heats organic raw materials (fruit shells, coal, wood, etc.) under isolated air conditions to reduce non carbon components (this process is called carbonization), and then reacts with gas to corrode the surface, producing a structure with well-developed micropores (this process is called activation). Due to the fact that the activation process is a microscopic process, where a large amount of molecular carbides corrode the surface in a point like manner, numerous small pores are formed on the surface of activated carbon. The diameter of micropores on the surface of activated carbon is mostly between 2-50nm. Even a small amount of activated carbon has a huge surface area, with a surface area of 500-1500m2 per gram of activated carbon. Almost all applications of activated carbon are based on this characteristic of activated carbon.

Activated carbon is named according to its material and shape. The naming method is based on the content specified in the naming principles, with three layers of content: the first layer represents the main raw materials for the production of activated carbon, using the first letter of the English word for the main raw materials in capital letters; The second layer represents the shape of activated carbon, which is capitalized with the first letter of the shape English word; The third layer is the name of activated carbon, composed of Chinese characters.

Classification symbols for raw materials

The classification symbol for the naming of raw materials used in the production of activated carbon is represented by capitalization of the first letter of the English word of the material name. If the first letter of the name is repeated, a lowercase English letter is added after the first letter of the English word, which is derived from the English word of the material name (consonant first). In the classification symbols for manufacturing raw materials, there are many types of processing raw materials that belong to the category of wood activated carbon, and the properties of activated carbon produced from various wood raw materials have certain differences. Therefore, the raw materials for manufacturing wood activated carbon are subdivided into four categories: sawdust activated carbon, fruit shell activated carbon, coconut shell activated carbon, and biomass activated carbon. The classification symbols for these four types of wooden activated carbon are represented by the raw material classification symbol (W) and the specific raw materials (sawdust, fruit shells, coconut shells, biomass) in uppercase letters with subscripts. The classification symbol can be found in the Chinese standard GB/T 32560-2016 "Classification and Naming of Activated Carbon" published in 2016. [1]

Shape classification symbol

The classification symbols for various shapes of activated carbon are represented by capitalization of the first letter of the shape name in English. If the first letter of the shape name is repeated, a lowercase English letter is added to the suffix of the first letter of the English word, which is derived from the English word of the shape (consonant first). For fragmented activated carbon, in addition to wood based fragmented activated carbon, there are currently three types of coal based fragmented activated carbonCoal based activated carbonDue to different production processes, there are significant differences in quality indicators and application fields. In order to facilitate manufacturers and application customers to distinguish between crushed coal activated carbon, the standard has made the following provisions for the naming and classification symbols of crushed activated carbon shapes: the shape classification symbol of crushed activated carbon is represented by G and the first letter of the specific English word for each type of crushed activated carbon, which is capitalized at the bottom of G and collectively represented. For example, crushed activated carbon (coal quality) is represented as GB [1]. The specific classification of shape naming can be found in the Chinese standard GB/T 32560-2016 "Classification and Naming of Activated Carbon" published in 2016