Physical activated carbon
Using carbon as raw material, water vapor, carbon dioxide, air (mainly oxygen) or their mixture (flue gas) is used as the activation medium, and the method of preparing activated carbon by activation at high temperature (600-1000°C) is called physical method. Activated carbon manufactured by physical method is called physical activated carbon, also known as physical carbon.https://www.chinactivecarbon.com/
Generally speaking, physical carbon has developed micropores (pores with pore diameter or pore width less than 1.5 nanometers), which are mainly used for gas phase adsorption or small molecule liquid phase adsorption. Activated carbon produced from different raw materials has different pore diameters. Among them, the pore diameter of coconut shell is small, the pore diameter of wood activated carbon is generally larger, and the pore diameter of coal-based activated carbon is between the two.
The pore size of activated carbon is generally divided into three categories: macropores: 1000-1000000A transition pores: 20-1000A micropores: 20A According to the above characteristics, it can be seen that for different adsorption objects, the corresponding activated carbon needs to be selected to achieve a good cost performance. Therefore, in liquid phase adsorption, activated carbon with more transition pores and larger average pores should be used.
According to the appearance shape: generally powdered activated carbon, granular activated carbon, unshaped granular activated carbon, cylindrical activated carbon, spherical activated carbon, and other shapes of activated carbon.
General physical methods mainly produce coal-based activated carbon and nutshell activated carbon.
Activated carbon made from coal is usually activated by water vapor or carbon dioxide gas. The shape of the product is mainly granular, and its pore size distribution is mostly micropores. It is more suitable for liquid phase adsorption and gas phase materials with smaller molecular weight and molecular diameter. . Its advantage is that the production cost is relatively low;
Activated carbon made from nut shells is usually activated by water vapor and carbon dioxide gas. The shape of the product is mainly granular. Due to its special material, its pore size distribution is between the above two types of activated carbon and has excellent adsorption performance. Therefore, its application range is wider.https://www.coalactivatedcarbon.com/
Using carbon as raw material, water vapor, carbon dioxide, air (mainly oxygen) or their mixture (flue gas) is used as the activation medium, and the method of preparing activated carbon by activation at high temperature (600-1000°C) is called physical method. Activated carbon manufactured by physical method is called physical activated carbon, also known as physical carbon.https://www.chinactivecarbon.com/
Generally speaking, physical carbon has developed micropores (pores with pore diameter or pore width less than 1.5 nanometers), which are mainly used for gas phase adsorption or small molecule liquid phase adsorption. Activated carbon produced from different raw materials has different pore diameters. Among them, the pore diameter of coconut shell is small, the pore diameter of wood activated carbon is generally larger, and the pore diameter of coal-based activated carbon is between the two.
The pore size of activated carbon is generally divided into three categories: macropores: 1000-1000000A transition pores: 20-1000A micropores: 20A According to the above characteristics, it can be seen that for different adsorption objects, the corresponding activated carbon needs to be selected to achieve a good cost performance. Therefore, in liquid phase adsorption, activated carbon with more transition pores and larger average pores should be used.
According to the appearance shape: generally powdered activated carbon, granular activated carbon, unshaped granular activated carbon, cylindrical activated carbon, spherical activated carbon, and other shapes of activated carbon.
General physical methods mainly produce coal-based activated carbon and nutshell activated carbon.
Activated carbon made from coal is usually activated by water vapor or carbon dioxide gas. The shape of the product is mainly granular, and its pore size distribution is mostly micropores. It is more suitable for liquid phase adsorption and gas phase materials with smaller molecular weight and molecular diameter. . Its advantage is that the production cost is relatively low;
Activated carbon made from nut shells is usually activated by water vapor and carbon dioxide gas. The shape of the product is mainly granular. Due to its special material, its pore size distribution is between the above two types of activated carbon and has excellent adsorption performance. Therefore, its application range is wider.https://www.coalactivatedcarbon.com/
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