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Does all home-distilled pure alcohol require purification with activated carbon?

Yes. Even if one makes equilibrated distillation, collects pure 95% body only, there will be traces from the fore shots and the head in the alcohol. Books and experts might tell you this is not so, but it is easy to prove: regenerate the carbon in an oven and smell the vapor.
 

 

Purification with activated carbon

Activated carbon as a means of purification of alcohol is a very effective natural product. It is also cheap, and the carbon can be recycled and used again. It is the world’s best-known medium for purification of water and alcohol. The fantastic properties of activated carbon allow us to trap poisons, creosotes, heavy metals, insecticides, bad smells and tastes, chemical substances, fusel oils and impurities, or undesirable substances in both liquid and gases.

Activated carbon works when ordinary physical filtering (using a sieve, filter paper and filter pads, and sand) cannot separate a particular substance. Activated carbon works by absorbing impurities into its pores. Absorption happens through cooperation of the carbon’s enormous adsorptive surface, including its weak electrostatic charges (known as Van der Waals forces, named after the scientist who studied them), together with the distribution of pore sizes (micro-, meso-, and macro pores), and the construction of the pores surfaces (called cohesion forces). The carbon pores become saturated with impurities, attaching even to the outside of the carbon.
 

 

What happens when carbon adsorbs impurities?

Absorption occurs when organic impurities are bound inside the carbon pores. This happens when the pores are marginally larger than the impurities (molecules) that they bind.
There are 2 kinds of absorption, physical and chemical

Physical absorption happens when the impurities are bound in the pores and on the surface of the carbon by means of Van der Waals electrostatic forces, making the carbon act as a magnet. The impurities on the outside of the carbon are loosely attached, like oversize molecules that have been trapped in the opening of smaller pores.

Chemical absorption is the union of impurities with other substances on the surface of the carbon pores. This is a powerful absorption. The chemical substances present on the pore surface depend on the raw material used, activation method, and after-treatment.
 

 

Three available forms of activated carbon

1. Pulverized carbon

2. Granulated carbon

3. Reformed (under high pressure) carbon, usually pellets
 

 

Purification ability depends on many things, including:

• Which carbon is used

• The surface of the carbon in sq. meters per gram

• Pore structure (distribution of micro-, meso- and macro pores)


Pages

  • A filter bed of granulated activated carbon
  • Activated carbon
  • Activated Carbon for Purification of Alcohol
  • Best pore combination for the purification of home-distilled alcohol
  • Does all home-distilled pure alcohol require purification with activated carbon?
  • Effectiveness
  • Granulated activated carbon
  • Increase the purification effect of carbon by 150%
  • Pore structure depends on raw materials used
  • Pores in chemically activated carbon
  • Pre-wetting method
  • Privacy
  • Problems with quality
  • Purification methods
  • Re-formed activated carbon
  • Recomended sites
  • Recycling activated carbon.
  • Recycling with steam
  • Sitemap
  • Some useful distillation tips
  • Steam activated carbon
  • The MTZ can be shortened by:
  • The substances
  • The substances that will be absorbed depend on:
  • What is important for the purification of alcohol as regards carbon pores

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