Activated carbon is a kind of carbon material with large specific surface area and strong adsorption and decolorization ability. In the 19th century, people used it to decolorize, remove flavor and purify sugar, wine and water. Bone charcoal has also been used to filter water for more than 100 years, and activated carbon was used to make gas masks during the First World War. By the 1990s, it has been widely used in sewage treatment, concentrated recovery of organic solvents, air purification and other environmental protection, gold extraction and other fields. Organic matter is carbonized at 600 ~ 700℃, and the remaining carbon material has the ability to reactivate or reactivate. However, these carbon materials firmly adsorb some gaseous hydrocarbons and other substances, reducing their activation capacity and raising the carbonization temperature above the critical temperature for the formation of activated carbon. So that these adsorbed gaseous substances can decompose and dissociate. Then it is activated with water vapor, carbon dioxide and so on to improve the activation ability to reach the industrial application level. The adsorption of activated carbon is due to the abundance of micropores inside, that is, there is a large specific surface area, therefore, the production of activated carbon is the use of organic matter in the carbonization and activation process to generate as many micropores as possible.

Application:

The application range of activated carbon is very wide, its application involves almost all fields of the national economy, in the gas phase adsorption, used to remove harmful gases from the exhaust gas, air purification in environmental protection, recovery of solvents, smoke desulfurization, atomic radiation protection and removal of nuclear fission radioactive materials and radioactive iodine, krypton, xenon and so on. In the liquid phase adsorption, it is used for the purification of glucose, malt sugar, sugar, dairy products, edible oil, juice drinks, alcohol, food additives such as monosodium glutamate, citric acid, AGAR, pectin and other foods in the food industry; Purification of various drugs and injections in the pharmaceutical industry; Refining, purification and recovery of various chemicals and industrial oils in the chemical industry; Wastewater treatment, water treatment; Synthetic fiber industry, petroleum refining, etc., and used as catalyst and catalyst carrier. With the development of science and technology, the variety and adsorption capacity of activated carbon will be further increased and improved, such as the recent development and research of high specific surface area of activated carbon, its surface area can reach 3000m2/g, the application range of activated carbon will be wider.