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Saturday, October 07, 2006
How to Make Activated Charcoal


Activated carbon, also called activated charcoal or activated coal, is a general term which covers carbon material mostly derived from charcoal. For all three variations of the name, "activated" is sometimes substituted with "active". By any name, it is a material with an exceptionally high surface area. Just one gram of activated carbon has the surface area of approximately two tennis courts, typically determined by nitrogen gas adsorption, and includes a large amount of microporosity. Sufficient activation for useful applications may come solely from the high surface area, though often further chemical treatment is used to enhance the absorbing properties of the material.

Coconut shell, a by-product of copra processing, is a good material for activated carbon/charcoal. Activated charcoal (charcoal activated with CO2, water vapor, or chemical compounds) made of coconut shell has advantages compared to other materials (wood, rice husk, corn cob) because of its ability to absorb color or aroma. It is used as supporting material for food and non-food industries (processing of cooking oil, sugar, and chemical matter purification).

Generally, coconut production at farmer level is 1 ton/ha, with coconut shell by-products of 0.9 ton, which in turn can yield 0.36 ton of activated charcoal. Price of activated charcoal is Rp 4,246,379.00/ton (US$440.00), income obtained is Rp 1,528,696.00 (US$158.00).

PROCESSING OF ACTIVATED CHARCOAL

Materials and equipment

* Coconut shell
* Drum or burning sink
* Oven
* Plastic pail
* Crusher wood/iron
* Draining tray
* Distilled water
* Sieve, 100 mesh

Methods

* Separate and clean coconut shell from other materials, such as coconut fiber or soil.
* Sun dry.
* Burn dried coconut shell at burning sink or drum at 300-500 oC for 3-5 hours.
* Soak charcoal in chemical solution (CaCl2 or ZnCl2 25%) for 12-18 hours to become activated charcoal.
* Wash charcoal with distilled/clean water.
* Spread on tray at room temperature to be drained.
* Dry in oven at temperature 110 oC for 3 hours.
* Crush or refine activated charcoal with crusher wood/iron into size of 100 mesh.
* Pack activated charcoal in plastic.

SOURCE: Wikipedia; www.fftc.agnet.org/library/article/pt2004003.html

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Contents and articles contained within this website are owned by their respective authors. These were collected to provide Filipinos the resources they need in starting their own business without the pain of searching the vast space of the World Wide Web. Credits and source link are indicated at the end of every article if it has been taken from another site,