Specific Surface Area and Particle Size The relationship between the particle size and surface area

The specific surface area increases with decreasing particle size. The specific surface area is also increased if the particle has pores. The specific surface area is important for the industrial process and for chemical reactions. Even with the same material with identical weight and volume, the surface activity and adsorption volume are changed according to the specific surface area. So it is important to measure the specific surface area to evaluate the activity and adsorption capacity of materials, (e.g. catalysis and adsorbent).

The following figure shows the relationship between the cube and surface area. It can be seen that the sample with the same volume and weight can have different surface areas.