The differences and advantages of coal activated carbon and wood activated carbon

Activated carbon made from coal and activated carbon made from wood are two common forms of activated carbon. While both are useful in environmental applications, they differ in their properties, characteristics, and applications.

Coal-based activated carbon is typically produced from bituminous coal. It is produced through a process called carbonization, where coal is heated to produce coke. The coke is then activated with steam and further processed to remove impurities. Wood-based activated carbon, on the other hand, is usually derived from coconut shells, wood chips or sawdust. It is produced through a process called pyrolysis, where the wood is heated in the absence of oxygen.

One key difference between these two forms of activated carbon is the size of their pores. Coal-based activated carbon has smaller pores, which allows for a higher surface area per unit volume. This makes it ideal for gas phase applications, where it is used to purify air or remove impurities from gases. Wood-based activated carbon has larger pores, which makes it better suited for liquid phase applications such as water filtration and wastewater treatment.

Another advantage of coal-based activated carbon is its ability to remove impurities at lower concentrations. It is more efficient in removing trace contaminants from air and gases as compared to wood-based activated carbon. Meanwhile, wood-based activated carbon has a higher adsorption capacity for organic contaminants. It is also more cost-effective than coal-based activated carbon.

Both coal-based and wood-based activated carbon have their own unique benefits and are suited for different applications. Coal-based activated carbon is ideal for gas phase applications and is more efficient at removing trace contaminants. Meanwhile, wood-based activated carbon has a higher capacity for organic contaminants and is more cost-effective.

In conclusion, both coal-based and wood-based activated carbon have their advantages and disadvantages. It is important to choose the right activated carbon for a particular application to achieve maximum effectiveness and cost-efficiency.