Physical adsorption instrument and analysis of specific surface area size

Physical adsorption instrument is a commonly used equipment to characterize the strength and weakness of adsorbates and adsorbents. It is usually used for characterizing the specific surface area and pore size, total pore volume, gas adsorption capacity, and equal adsorption heat of nanomaterials IAST gas selectivity analysis. Such as SSA4000 and SSA7000 physical adsorption instruments.

Isotherms of nitrogen adsorption and desorption with various pore types

Physical adsorption is the adsorption caused by the adsorbate, adsorption, and intermolecular forces. The first layer occurs in the interaction between solid and gas, and from the second layer onwards, it is mainly formed by intermolecular condensation. Physical adsorption often occurs in low-temperature environments, characterized by a smaller heat of evaporation; The higher the boiling point of a gas or the lower the saturated vapor pressure, the greater the physical adsorption capacity; Generally, activation energy is not required, so the adsorption and desorption rates are relatively fast; No selectivity; It can be adsorbed on a single molecular layer or multiple molecular layers; The structure of the adsorbed molecules does not change significantly and will not form new chemical bonds; It is a reversible reaction.

Physical adsorption is the adsorption caused by the adsorbate, adsorption, and intermolecular forces. The first layer occurs in the interaction between solid and gas, and from the second layer onwards, it is mainly formed by intermolecular condensation. Physical adsorption often occurs in low-temperature environments, characterized by a smaller heat of evaporation; The higher the boiling point of a gas or the lower the saturated vapor pressure, the greater the physical adsorption capacity; Generally, activation energy is not required, so the adsorption and desorption rates are relatively fast; No selectivity; It can be adsorbed on a single molecular layer or multiple molecular layers; The structure of the adsorbed molecules does not change significantly and will not form new chemical bonds; It is a reversible reaction.

Physical adsorption is often used to recover useful substances or remove impurities from gas-liquid media, such as gas separation and gas-liquid drying, and is of great significance in multiphase catalysis. It has a wide range of applications in chemical industry, petroleum processing industry, agriculture, and other fields.

Physical adsorption is often used to recover useful substances or remove impurities from gas-liquid media, such as gas separation and gas-liquid drying, and is of great significance in multiphase catalysis. It has a wide range of applications in chemical industry, petroleum processing industry, agriculture, and other fields.