[Gasification] Filtering Pyrolisis Gas
Robert Kana
sinan at biomassindo.com
Sun Apr 17 09:12:38 CDT 2011
Dear Tom and all,
Your comments on the charcoal issue is right. This information is for
the people who would be interested in charcoal making.
Not properly dried wood will never yield more than 20% charcoal and most
of the pieces will be broken. Charcoal which is not broken in pieces,
burn longer and gives more energy. In the market what is called Grade A
charcoal, brings 30 to 40% more price than lump charcoal. What is most
important today is try to make charcoal as clean as possible
environmentally, even in traditional kilns.
If the wood is burned too fast and not dried, average yield from the
traditional kiln will be 25% charcoal which 35% will be Grade A.
We have been doing research on a new way of making charcoal from
Bulgaria, Turkey and Indonesia. New regulations from EC, makes companies
search for alternative way of making charcoal even cleaner than retort
systems.
After many months of trying in lab and field tests shows, the results
are impressive. Only release smoke contains water-steam from drying wood
in kiln, all the rest of the gases burned in process, carbonization
takes about 6 days for 4 m3 kiln. From Oak wood, we get 36 % average
yield of charcoal which 68 % is Grade A.
This is an important issue when it comes to yield of charcoal and how
clean it can be produced.
Robert S. Kana, Biomass Energy, Indonesia
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