Shanghai Activated Carbon Co., Ltd

What is activated carbon?

The primary raw material for activated carbon is any organic material with a high carbon content, such as coal, wood, sawdust, nut shells and so on. The carbonaceous material is converted to activated carbon by heat treatment using a controlled atmosphere and high temperature. During the activation process, a large surface area and a complicate pore structure are created where the adsorption takes place. According to IUPAC definitions threes groups of pores are distinguished:

Macropores (above 50nm diameter)
Mesopores (2-50nm diameter)
Micropores (under 2 nm diameter)

Micropores generally contribute to the major part of the surface area of carbon. The pore volume of micropores is 0.25~0.9vml/g, and the quantity of micropores is about 10²⁰ per gram. As counted by BET method, all surface area of micropores is 500~1500m²/g.
According to different appearance, there are two groups of activated carbon as follow:
Powdered activated carbon: particle size ranges from 1micron to 150 microns
Granular activated carbon: there are two forms, grain form and extruded cylindrical form. Particle size ranges from 0.5mm to 4.0mm.

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