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Columnar activated carbon is a multi-purpose adsorbent. In addition to its strength and price advantages, the adsorption capacity is an important part of ensuring that the columnar activated carbon can be widely used in many fields.
The adsorption principle of columnar activated carbon for harmful substances:
If you carefully observe the surface of the columnar activated carbon, you will find a layer of fine pores. The adsorption capacity of the columnar activated carbon mainly comes from these dense pores. These pores are difficult to distinguish by the naked eye. Each internal space is the size of a house and can store a large amount of harmful substances. Plenty of internal space with columnar activated carbon.
In liquid and gas phase adsorption, the adsorption of columnar activated carbon mainly relies on the van der Waals force between molecules. Different molecules will attract each other due to the difference in positive and negative charges.china activated carbon manufacturer The columnar activated carbon has a certain amount of molecules inside, and the molecules in the pores are due to the charge. The uneven attraction of external molecules makes the molecules of harmful substances adsorbed by the columnar activated carbon. The more internal molecules are, the stronger the influence will be until the inside of the columnar activated carbon is filled.
Generally, the smaller the particle size, the stronger the adsorption capacity of columnar activated carbon, but the price of columnar activated carbon is relatively high.
It should be noted that the adsorption effect of columnar activated carbon is closely related to temperature, pressure, flow rate, and concentration.
At the same time, it should be noted that the columnar activated carbon can only adsorb harmful substances whose material molecules are smaller than the pore diameter. Generally, the adsorption radius is 4-8 times that of the adsorbed material. The columnar activated carbon has good adsorption capacity. The molecular diameter of formaldehyde, benzene, xylene, etc. are all less than 1 Nano, so the columnar activated carbon has strong adsorption capacity for such substances.
Because the air is generally neutral, and the molecular diameter of air is larger than the pores of the columnar activated carbon, the coal columnar activated carbon has a small air adsorption capacity.https://www.coalactivatedcarbon.com