Using the Whole Coconut PDF Print E-mail
Written by ABOFOA   
Friday, 01 July 2011 01:14

 

This article is under development. William Rodriguez Trigoso, one of the founding members of ABOFOA, has an important operation in Pucacaca where he processes coconuts in a way that wastes no part of the nut. He processes the shell into charcoal. I am working with Ricardo Fernandez and William Trigoso to get this page to describe what is done.  RV

ADDED  notice new photos at the bottom.

 

 

 

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Activated Carbon * - Project Profile

Introduction

Coconut shell is used for manufacturing a variety of products of commercial importance including activated carbon. Shell is carbonized by using methods like pit method, drum method, destructive distillation etc. Shell based activated carbon is extensively used in the process of refining and bleaching of vegetable oils and chemical solutions, water purification, recovery of solvents, recovery of gold etc. It is used in gas masks and a wide range of filters for war gases and nuclear fall outs. Coconut shell based activated carbon units adopt steam activation process to produce good quality activated carbon Activated carbon is a non-graphite form of carbon which could be produced from any carbonaceous material such as coal, lignite, wood, paddy husk, coir pith, coconut shell, etc. Activated carbon manufactured from coconut shell is considered superior to those obtained from other sources mainly because of small macropores structure which renders it more effective for the adsorption of gas/vapour and for the removal of colour and odour of compounds. The activated carbon is extensively used in the refining and bleaching of vegetable oils and chemical solutions, water purification, recovery of solvents and other vapours, recovery of gold, in gas masks for protection against toxic gases, in filters for providing adequate protection against war gases/nuclear fall outs, etc. Steam activation and chemical activation are the two commonly used processes for the manufacture of activated carbon. However coconut shell based activated carbon units are adopting the steam activation process to produce good quality activated carbon.

Process (Steam Activation)

The process of activation is carried out in two stages. Firstly the coconut shell is converted into shell charcoal by carbonization process which is usually carried out in mud-pits, brick kilns and metallic portable kilns. The coconut shell charcoal is activated by reaction with steam at a temperature of 900oC -1100oC under controlled atmosphere in a rotary kiln. The reaction between steam and charcoal takes place at the internal surface area, creating more sites for adsorption. The temperature factor, in the process of activation is very important. Below 900oC the reaction becomes too slow and is very uneconomical. Above 1100oC the reaction becomes diffusion controlled and therefore takes place on the outer surface of the charcoal resulting in loss of charcoal.


 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Photos from the EXPOAMAZÓNICA 2011  show in Tarapoto:

The Booth

Products

 

 

Burning

 

 

 

 



Last Updated on Saturday, 06 August 2011 00:48