| Activated carbon filtration is used to effectively clean spirits by removing impurities. Activated carbon mainly consists of elementary carbon in a graphite like structure. It differs from graphite by having a random imperfect structure which is highly porous over a broad range of pore sizes which can be divided into three groups:
1.Macropores (above 50 nm diameter)
2.Mesopores (2-50 nm diameter)
3.Micropores (below 2 nm diameter)
The varied pore structure gives the carbon its very large surface area (approximatley 2500 m2 /g) and also allows the carbon to adsorb a wide range of compounds.
Activated carbon works by adsorbing the compounds it is removing. While particles may be removed, there is no significant filtration action. activated carbon for gold mining Adsorption is caused by London dispersion forces, a type of Van der Waals Force which exists between molecules. The force is very strong, but works over short distances only and is sensitive to the distance between the carbon‘s surface and the adsorbate molecule.
Typical uses of activated carbon in distilled spirts are:
1.Color removal
2.Aroma and flavor adjustments
To successfully apply activated carbon to your process, it is important to carefully define the desired specification for the final treated product.
Sometimes the specification will be a measurable change like color, but in other cases the specification maybe based on a taste profile. In either case, the process must be very well defined so that the results are repeatable.activated carbon suppliers in china If the process is not well defined, the final product might be under treated resulting in uneccessary rework. If over treatment occurs, the product may be irreversibly stripped of desirable color and/or aromas.
Once the specification is established, careful small scale or laboratory trials are useful to determine which grade of activated carbon works most effectively and how much carbon media is needed per volume of product. |
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