Views: 1     Author: Site Editor     Publish Time: 2023-08-16      Origin: Site


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When selecting an activated carbon for a particular application, a variety of characteristics should be considered:

Pore Structure

The pore structure of activated carbon varies and is largely a result of the source material and the method of production. The pore structure, in combination with attractive forces, is what allows adsorption to occur.


Hardness/abrasion is also a key factor in selection. Many applications will require the activated carbon to have a high particle strength and a resistance to attrition (the breakdown of material into fines). Activated carbon produced from coconut shells has the highest hardness of activated carbons.

Adsorptive Properties

The absorptive properties of the activated carbon encompass several characteristics, including adsorptive capacity, the rate of adsorption, and the overall effectiveness of activated carbon.

Depending on the application (liquid or gas), these properties may be indicated by a number of factors, including the iodine number, surface area, and Carbon Tetrachloride Activity (CTC).

Apparent Density

While apparent density will not affect the adsorption per unit weight, it will affect the adsorption per unit volume.


Ideally, the amount of physical moisture contained within the activated carbon should fall within 3-6%.

Ash Content

The ash content of activated carbon is a measure of the inert, amorphous, inorganic, and unusable part of the material. The ash content will ideally be as low as possible, as the the quality of the activated carbon increases as ash content decreases. 

pH Value

The pH value is often measured to predict potential change when activated carbon is added to liquid.

Particle Size

Particle size has a direct effect on adsorption kinetics, flow characteristics, and filterability of the activated carbon.

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