What Is The Physical Adsorption Principle of Coconut Shell Activated Carbon?

Coconut Shell Activated Carbon has many different shapes and sizes of fine pores, the total area of the pore wall is the surface area, no shell activated carbon surface area of up to 700 ~ 1600 square meters, due to such a large surface area, so that the activated carbon has a strong Adsorption capacity.

Among them, the physical Adsorption property is relatively simple and easy to understand is the Adsorption generated by molecular force, which is characterized in that the adsorbed molecules are not attached to the fixed points on the surface of the adsorbent, but can move freely on the interface.

It is an exothermic process, the heat of Adsorption is small, generally 21-41.8kg/mol, does not require activation energy, and can be carried out at low temperature; it is a reversible process, that is, at the same time of Adsorption, the adsorbed molecules move due to heat It also leaves the solid surface, a phenomenon called desorption.

Physical Adsorption can form monomolecular layer Adsorption and multi-molecular layer Adsorption. Due to the ubiquitous existence of molecular force, an adsorbent can adsorb a variety of substances, but due to different Adsorption substances, the amount of Adsorption is also different. This Adsorption phenomenon It is closely related to the surface area and pore distribution of the adsorbent, and is also related to the surface tension of the adsorbent.

 

The Adsorption of aromatic chemicals by Coconut Shell Activated Carbon is better than that of non-aromatic compounds, such as the Adsorption of benzene is better than the Adsorption of cyclohexane.

The Adsorption of organic compounds without inorganic elements or groups such as phosphorus, carbon, cyanide, and fluorine is always better than that of organic compounds containing these inorganic elements or genes. For example, the Adsorption of benzene by Coconut Shell Activated Carbon is higher than that of nitrobenzene.

The Adsorption of branched-chain hydrocarbons is better than that of branched-chain hydrocarbons.

The Adsorption of high-boiling organic compounds with large molecular weights is always higher than the Adsorption of low-boiling organic compounds with small molecular weights.