Solid parameters of specific surface area instrument
The solid surface has adsorption characteristics, and coal adsorbs gas and liquid. The surface area and porosity play a major role in the adsorption phenomenon, so the strength of the adsorption is closely related to the surface area. The larger the surface area, the stronger the adsorption. The specific surface area of ​​coal is an important parameter of the special processing technology and gasification technology of coal. Because nitrogen is a chemically inert gas and chemical adsorption is not likely to occur at the temperature of liquid nitrogen, the low temperature nitrogen adsorption method is the most commonly used method for measuring specific surface area.
Specific surface is the abbreviation of specific surface area meter. Specific surface area refers to the total area per unit mass of material. There are two types of external surface area and internal surface area. The unit is m2 / g. The ideal non-porous material only has an external surface area, diatomaceous earth, etc. Measurement methods include volumetric adsorption method, gravimetric adsorption method, flow adsorption method, ventilation method, and gas adhesion method.
The adsorption isotherm is a source of information about the pore structure of the adsorbent, the heat of adsorption, and other physical and chemical characteristics. The adsorption isotherm of the adsorbate can be obtained under the conditions of constant temperature and wide range of relative pressure
Generally, it has a relatively large specific surface area; the efficiency of adsorbent catalyst carbon black and other materials is closely related to the specific surface area. Certain performance requires a certain range of specific surface requirements; but it is not that the larger the specific surface area, the better the powder quality.
The statistical adsorption layer thickness method is mainly used to calculate the external specific surface; there is a common specific surface test method in the dynamic chromatography method, which is called the solid standard reference method or the direct comparison method. For example, the basis of the solid standard reference method is two: the thickness of the adsorption layer is consistent; this is why the specific surface value obtained by the solid standard reference method is completely consistent with the value obtained by the BET multipoint method.
Size:16 / 18 / 20cm
Can be produced by processed aluminum, forged aluminum or die-cast aluminum.
Different thickness can be available
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