What are the effects of different raw materials on key steps in the production process of activated carbon?

In the production process of activated carbon, the selection of raw materials has a significant impact on each key step, as different raw materials have different chemical and physical properties. The following are several common raw materials and their effects on the production process of activated carbon:

1. Wood:

-Carbonization: Wood is prone to forming larger pore structures during the carbonization process because its fibers and cellular structure are relatively loose. This gives wood activated carbon an advantage in adsorbing large molecular substances.

-Activation: Wood activated carbon is typically increased in specific surface area through physical activation (such as water vapor), making it suitable for applications that require a large number of mesopores and macropores.

-Final characteristics: Wood derived activated carbon generally has a high adsorption capacity and is suitable for applications such as water treatment and air purification that require the treatment of large molecule pollutants.

2. Coconut shell:

-Carbonization: Coconut shells have a high-density and hard structure, forming numerous micropores during the carbonization process. This makes coconut shell activated carbon very effective in adsorbing small molecule substances.

-Activation: Coconut shell activated carbon is typically enhanced in its microporous structure through high-temperature physical activation, making it suitable for applications that require high specific surface area.

-Final characteristics: Coconut shell activated carbon is known for its high hardness and high adsorption capacity, and is widely used for drinking water purification and air filtration.

3. Coal:

-Carbonization: The carbonized material formed after coalification usually has a medium density and pore structure, between wood and coconut shell.

-Activation: Coal based activated carbon can adjust its pore structure through physical or chemical activation, suitable for various application needs.

-Final characteristics: Coal based activated carbon has diverse pore structures and is suitable for industrial water treatment, gas purification, and solvent recovery applications.