Adsorption rate and amount of activated carbon

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Adsorption rate and amount of activated carbon Ding Xin Da global high quality activated carbon supplier

#1 CLMcar

Advanced Member

Group: Members
Posts: 744
Joined: 07-March 21

Posted 05 November 2021 - 11:05 PM

The general use of medicinal or chemical pure activated carbon. This kind of activated carbon particles is very fine, in powder form, the total surface area is particularly large, the adsorption capacity is very strong, the adsorption capacity is also very large, is the strongest kind of activated carbon adsorption force. But because the particles are too fine, the flow rate is too slow in the process of chromatography, the operation of pressure or decompression is needed, the procedure is more complicated, and the adsorption selectivity of various components is also poor, so it is less used in chromatography.
Medicinal or chemical pure activated carbon before leaving the factory after impurity treatment and metal limit inspection, can be used directly for chromatography. Industrial activated carbon is not processed by impurities before leaving the factory, often contains metal ions, affecting the separation effect, so it must be treated before use, its treatment methods are two.Adsorption capacity refers to the amount of adsorbents adsorbed on the adsorbent per unit mass under certain conditions. It is usually expressed in terms of K adsorbents /kg of adsorbent or mass percentage, which is a sign of the adsorption capacity of the adsorbent.
In industry, the amount of adsorption is called the activity of the adsorbent.
The activity of the adsorbent can be expressed in two ways :(1) the static activity of the adsorbentUnder certain conditions, the equilibrium adsorption capacity of the adsorbent is its static activity.For a certain adsorption system, the static activity depends only on the adsorption temperature and the concentration or partial pressure of the adsorbed substance.https://www.granular-activated-carbon.com/
Dynamic activity of adsorbents
Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent.
The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions.
The kinetic activity value of adsorbent is the main basis for the design of adsorption system.
The adsorption rateThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, the adsorption process can be divided intoThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, which can be divided into the following steps
(1) External diffusion, the adsorbate from the main air flow through the air film around the particles to the outer surface of the adsorbent; (2) Internal diffusion, the adsorbate from the outer surface through micropores to the surface of the adsorbent micropores