Shanghai Activated Carbon Filter Factory Share: What is the specific surface area of activated carbon.

What is the specific surface area definition of activated carbon? The specific surface area is the sum of the surface area outside the activated carbon and the surface area of the internal pores, and the surface area we can intuitively see only accounts for a very small part of the specific surface area. 95% or more of the surface area of activated carbon is in micropores, so in addition to some macromolecules that can not enter, micropores are an important factor in determining the adsorption performance of activated carbon. During the activation process, pores of different shapes and sizes are generated between microcrystals. The internal surface area is the sum of the surface areas of large pores, medium pores, and micropores. The surface area size determines the adsorption capacity of activated carbon. The pore volume of activated carbon micropores is generally only 0.25-0.9mL/g, the number of pores is about 1020 /g, and the surface area of all micropores is about 500-1500m2/g, which is usually measured by BET method, and it is also called as high as 3500-5000 m2/g, which is called "special carbon" by some people in the industry.