The role of activated carbon in the pharmaceutical industry

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Asked at 2021-06-05 00:54:47

Because of these pores, especially the micropores provide a large surface area.

The pore volume of activated carbon micropores is generally only 0.25-0.9mL/g, the number of pores is about 1020 lg, and the surface area of all micropores is about 500-1500m2/g, which is usually measured by the BET method, and it is also said to be as high as 3500-5000 m2/g.

Activated carbon almost more than 95% of the surface area is in the micropore, so in addition to some macromolecules can not enter, micropore is an important factor to determine the adsorption performance of activated carbon.

The pore volume of mesopores is generally about 0.02-1.0 MLLg, and the surface area can be up to several hundred square meters, generally only about 5% of the total activated carbon silkworm species.activated charcoal wholesale australia 

Its function can adsorb steam, and can provide a channel for adsorbent to enter the micropore, and can directly adsorb larger molecules.

The pore volume of the macropore is generally about 0.2-0.5mL /g, and the surface area is only about 0.5-2m2 /g. Its role is to make the adsorbate molecules quickly penetrate into the smaller pores inside the activated carbon. 

: as a catalytic carrier, the catalyst is often a small amount of precipitation in the micropore, mostly precipitation in the macropore and mesopore.

The surface area of the activated carbon should include the inner surface area and the outer surface area. In fact, the adsorption properties mainly come to the inner surface area of the white Li large, so it can not be mistaken for: the activated carbon grinding and grinding will significantly improve the surface area to improve the adsorption force.

Many adsorbations are recursive physical adsorption, that is, the adsorbed matter is a fluid, which is adsorbed by activated carbon at a certain temperature and pressure. At high temperature and low pressure, the adsorbed matter desorbs out, and the inner surface of activated carbon returns to its original state.

This is a widely used physical adsorption, also known as van der Waals adsorption academically. 


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