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[tvoivozhd <tvoivozd AT infionline.net>]

All activated charcoal is not the same, and for different purposes need 
not be. But it keeps coming to mind as a good flea market product for 
which no competition exists---something easy to package and romance for 
many uses.  If it takes off, set up a website to add to sales volume.

https://lists.ibiblio.org/sympa/arc/homestead/2004-September/000384.html



ear Piet, Mike, Stoves and Gasification;
>
> Sometimes the best is the enemy of the good.  If 100-400 IN charcoal is
> easily available at low cost, use it.
>
> When wood is gasified the yield of charcoal is only 3-10% and the 
process
> of converting the rest to gas is much like that that is used for making
> activated charcoal.  Depending on the process I believe the IN can be as
> high as 400 without further effort and Agua Das and I think that a small
> change in the gasifier output could produce activated charcoal with 
an IN
> of 800-1000.
>
> I hope someone can send Mike Antal some gasifier charcoal to test 
while he
> is in Budapest...
>
> Onward,       TOM REED
>
> -------------- Original message --------------
>
>> I think Mike Antal makes a lot of sense when he suggests using normal
>> charcoal instead of activated carbon for water purification in 
developing
>> countries.
>> To get a comparable active surface ares you need 2.5 to 10 times the 
mass
>> of active carbon. And much less fuss producing it.
>>
>> Peter Verhaart
>>
>>
>> At 18:19 12/10/2004, you wrote:
>> >Dear Rusty: this message comes to you from Budapest where for one 
month
>> >I am
>> >studying the properties of biocarbons (charcoal)with colleagues in the
>> >Hungarian Academy of Sciences.
>> >
>> >Most charcoals possess a surface area (comparable to iodine number) of
>> >100
>> >to 400 m2/g. The required IN of commercial activated charcoal used to
>> >treat
>> >water in the cities of the USA is 1000. Cities usually use IN 
instead of
>> >surface area as the criteria for purchase of activated carbons. 
Because
>> >of
>> >their requirement, untreated (i.e. unactivated) charcoal is usually 
not
>> >used
>> >to treat water.
>> __________________________________


Activated charcoal absorptive quality is principally described by 
surface area or IN number (Iodine number)  There are other factors, see 
URL below.

http://www.carbochem.com/activatedcarbon101.html


Most charcoals possess a surface area (comparable to iodine number) of
>> >100
>> >to 400 m2/g. The required IN of commercial activated charcoal used to
>> >treat
>> >water in the cities of the USA is 1000. Cities usually use IN 
instead of
>> >surface area as the criteria for purchase of activated carbons. 
Because
>> >of
>> >their requirement, untreated (i.e. unactivated) charcoal is usually 
not
>> >used
>> >to treat water.
>> __________________________________