Learn more about activated carbon filters

I. Terminology related to activated carbon filter

1. Service life: the long period that activated carbon materials can be used, brand new activated carbon materials will also continue to reduce efficiency in use when the concentration of harmful substances contained in the equipment is close to the permissible range, the service life of the equipment will expire.

2. Adsorption capacity: for the gas to be filtered, the large capacity that can be adsorbed by a unit of activated carbon particles is called "adsorption capacity", and the adsorption capacity of different materials is also different.

3. Retention time: The longer the airflow through the activated carbon layer, the better the adsorption effect and the more adequate the adsorption.

II. Material selection of activated carbon filter

1. Activated carbon materials can generally be divided into granular carbon. Fibre carbon, etc.

2. Among them, the use of fiber-activated carbon is very, it is made of organic fibers containing carbon, characterized by small pore size. High adsorption capacity. Fast regeneration.

III. The selection method of the activated carbon filter

1. The first thing to note when selecting an activated carbon filter is that several factors affect the adsorption efficiency of activated carbon, such as the type of pollutant. Concentration is the temperature of airflow. Pressure. Relative humidity, etc.

2. According to the type of pollutant. The type of activated carbon is determined according to the type of pollutant, its concentration, and the air volume to be treated.

3. The change in the concentration of pollutants before and after the filter can be used to determine whether the activated carbon should be replaced.

4. In the process of use, if the resistance of the activated carbon remains unchanged, you should ask a professional to determine whether the service life of the equipment has expired according to the change in weight.

IV. The adsorption principle of activated carbon filters

1. Activated carbon materials selectively adsorb gases, rather than filtering them mechanically.

2. The surface of activated carbon contains a large number of micro-pores, and the total internal surface area of micro-pores per unit of material is called "specific surface area", the larger the specific surface area the better the adsorption effect.

3. In adsorption, we call the harmful gases in the air "adsorbent" and activated carbon is the "adsorbent", if a chemical reaction occurs during the operation of these media, it is chemisorption and vice versa for physical adsorption.