Characteristics of coal-based activated carbon
Coal-based activated carbon is made from coal through carbonization and activation. Its main characteristics include: 1. High specific surface area: It has a rich microporous structure and provides a large number of adsorption sites.
- Good mechanical strength: It is wear-resistant and not easy to break, suitable for various filtration and adsorption devices.
- Chemical stability: It remains stable in acid, alkali and high temperature environments and is not easily destroyed by chemical reactions.Methods for selecting high-quality coal-based activated carbon
- Specific surface area
Specific surface area is an important indicator for measuring the adsorption capacity of activated carbon. Generally speaking, the larger the specific surface area, the stronger the adsorption capacity of activated carbon. The commonly used measurement method is the BET (Brunauer-Emmett-Teller) method.
- Pore size distribution
The pore size distribution of coal-based activated carbon has an important influence on its adsorption performance. According to the application requirements, select activated carbon with appropriate pore size distribution. For example, activated carbon used for water treatment should have more mesopores and macropores to effectively remove large molecular organic matter; while activated carbon used for gas adsorption requires more micropores to improve the adsorption capacity of small molecular gases.
3 Adsorption capacity
Adsorption capacity refers to the maximum amount of activated carbon adsorbing a specific substance. It can be determined by static and dynamic adsorption tests. Selecting activated carbon with high adsorption capacity can improve treatment efficiency and extend service life.
