Characteristics of different adsorbents
Activated carbon: It has a rich microporous and mesoporous structure, with a specific surface area of about 500-1000m2/g, and a pore size distribution mainly between 2-50nm. Activated carbon mainly relies on the van der Waals force generated by the adsorbate to generate adsorption, and is mainly used for the adsorption and removal of organic compounds, heavy hydrocarbon organic compounds, and deodorants;
Molecular sieve: It has a regular microporous pore structure with a specific surface area of about 500-1000m2/g, mainly composed of micropores, with pore size distribution between 0.4-1nm. The adsorption characteristics of molecular sieves can be changed by adjusting their structure, composition, and type of equilibrium cations. Molecular sieves mainly rely on the characteristic pore structure and the Coulomb force field between the equilibrium cations and the molecular sieve framework to generate adsorption. They have good thermal and hydrothermal stability and are widely used in the separation and purification of various gas and liquid phases. When used as adsorbents, molecular sieves have strong selectivity, high adsorption depth, and large adsorption capacity;
Silica gel: Silicone type adsorbent has a specific surface area of about 300-500m2/g, mainly mesoporous, with a pore size distribution of 2-50nm. The internal surface of its pore channels contains abundant surface hydroxyl groups, mainly used for adsorption drying and pressure swing adsorption to produce CO2;
Activated alumina: With a specific surface area of 200-500m2/g, it is mainly mesoporous and has a pore size distribution of 2-50nm. It is mainly used for drying, dehydration, acidic waste gas purification, etc.
Post time: Sep-26-2023