Gaseous contaminant filters for mechanical ventilation systems use two main mechanisms to remove gaseous contaminants from the air:a physical adsorption;the other is a chemical reaction called chemisorption，用于去除活性化学品，如酸、碱、氢化物等。 Chem. Filteris selectively adsorbed and chemically reacted with the polluted gases rather than mechanicallythan mechanicallyis selectively adsorbed and chemically reacted with the polluted gases. Helvetica">"filter"impurities.

(substances that are adsorbed on the surface of an object are called adsorbents, and substances that adsorb adsorbents are called adsorbents)

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Physical adsorption

Physical adsorption is the process by which one substance is attracted to another and attached to the surface, and the adsorbent's The removal capacity of an adsorbent is directly related to its total surface area. The higher the surface area the higher the adsorption capacity, independent of particle size. It is therefore important to develop materials with the largest possible specific surface area.

The net rate of adsorption depends on the rate at which gas molecules reach the surface of the adsorbent, the percentage of adsorbent material exposed to the adsorbent, and the rate of desorption. However many other factors may affect the removal of gaseous contaminants by physical adsorption, including the type of adsorbent, airflow resistance, depth of the adsorption bed, temperature, relative humidity, and velocity of air passing through the bed, and the characterization of contaminants in the space surrounding the adsorbent.

Physical adsorption is easily saturated, and in order to adsorb other substances, it is easy to release the already adsorbed substances, and the process is reversible.

Chemisorption

For substances with small molecular weights and low boiling points, which are gaseous at room temperature, it is recommended to use the following method to reduce the molecular weight and boiling point. For substances with small molecular weight and low boiling point, which are in gaseous state at room temperature, because they cannot be condensed and liquefied on the surface of adsorbent, they are not easy to be stably attached to the surface of adsorbent, and they are easy to be detached, vaporized or replaced by other molecules. In order to improve the adsorption capacity of the adsorbent material for this specific type of gas (e.g., ammonia, formaldehyde), the adsorbent is often chemically treated, and the adsorption of the chemically treated adsorbent material and the chemical reaction of the harmful gases is called chemical adsorption,process is irreversibleprocess is irreversible.

This type of modification on the surface of the adsorbent allows the active site on the surface of the adsorbent to react with the adsorbed material by electrostatic force or by forming an electron beam with the adsorbent. The adsorption process in which the surface of the adsorbent is modified so that the active site on the surface of the adsorbent and the adsorbed material form stable compounds by electrostatic forces or electron pairs, and the adsorbent material cannot be regenerated or reused. The adsorbent adsorbs gas molecules by the Van der Walls force, and then the chemical additives react with the pollutant molecules to form a stable compound. font-size:14px">Produces a solid component or a harmless gas.

It is through this principle that Esky Purify filter media is realized.

EVERGREEN PURIFICATION can provide precise solutions for different environmental characteristics to ensure the best air quality and pollution control!

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