Views: 0 Author: Site Editor Publish Time: 2022-06-15 Origin: Site
Working principle of adsorption through molecular activated carbon filter
}Active carbon is a kind of microcrystalline carbon material, which is mainly made of carbon containing materials, with black appearance, developed internal pore structure, large specific surface area and strong adsorption capacity. There are a large number of invisible micropores in the activated carbon material. The micropores in 1g of activated carbon material can reach a surface area of 800-3000 square meters after expansion, which is higher for special purposes. In other words, in an activated carbon particle the size of a rice grain, the internal surface area of the micropore may be equivalent to the size of a living room. It is these highly developed pore structures, such as human capillaries, that enable activated carbon to have excellent adsorption properties
Filters with different treatment methods are provided according to different needs, such as acid volatile reagent. If pure activated
carbon is used, the filtering effect is very limited. The activated carbon needs to be soaked in alkaline solution or treated with additives in other ways to achieve the best filtering effect.
By the interaction between molecules
The interaction between molecules is also called "van der Waals gravitation". Although the velocity of molecular motion is affected by temperature, material and other factors, it is always moving in the microenvironment. Due to the mutual attraction between molecules, when a molecule is captured by the inner pores of activated carbon into the inner pores of activated carbon, more molecules will be attracted until the inner pores of activated carbon are filled due to the mutual attraction between molecules.
working principle
The Ductless Fume Hoods is equipped with 1-4 original imported fans. The air in the laboratory enters from the opening of the inclined front door panel. Various toxic and harmful gases and dust generated during the experimental operation are adsorbed and filtered by the high-efficiency molecular filter to form pure gas, which is discharged out of the cabinet, so as to achieve the purpose of purifying the air in the cabinet and indoor air, and effectively protect the inhalation hazards caused by laboratory personnel operating chemicals.
Suitable for the following types of laboratory situations:
Experiment for liquid operation
Applicable to liquid and dust experiments
Experiment applicable to dust
Placement of instruments in the laboratory
Service conditions of Ductless Fume Hoods
It is applicable to chemical experiments with small and medium doses. For a large number of chemical operations that are not suitable for the use of ductless gas purifying fume hoods, it is necessary to fill in a questionnaire before purchase to determine the chemical name, container type, opening or closing, concentration, temperature, operating dose, operating frequency, operating type and minimum duration of the chemicals used in the operation, so as to determine whether the service time limit of ductless fume hoods and activated carbon filters is applicable.
