[Stoves] [Gasification] Charcoal: Char Analyses?

[Tom Reed]

Dear Mark:

Here's the chemistry of pyrolysis vs temperature:

Biomass is typically CH(1.4) O(0.6).  This can be re-written as C 
(H2O)0.6 H(0.2), ie pure carbon with 0.6 H2Os attached.  The various 
stages of pyrolysis correspond to loss of successively more water.  At 
successively high temperatures you will drive off 0.1 H2O 
(*torrefaction*, 220-280 C); 0.2 H2O (*Sea Sweep*, our patent, 350 C); 
0.3 H2O (*cooking charcoal*, reaches an exothermic endpoint about 450 
C); 0.4 H2Os (*metallurgical* charcoal, 600 C);  0.5 H2Os (*activated 
*charcoal, 800 C); 0.6 H2Os, (almost never, 1000C); pure carbon, no H2O 
or H2, 1200 C.  This is all very clear on our triangular diagram which 
Tom Miles is publishing. 

Hope this clarifies. 

Tom Reed         BEF

Mark & Elena Gallmeier wrote:

>Dear Ed,
>
>Thanks for the prompt reply.  The BEF link to the Nertherlands Energy 
>Research Center Phyllis database is good.
>
>http://www.ecn.nl/phyllis/search.asp
>
>Searching on 'char' provides char data, and also a perfect example of what 
>I'm looking for at the bottom of the search page.  These are two analyses of 
>willow char pyrolyzed at 350C and 550C.  This is what I'm looking for, in as 
>many wood species as possible, with as many data points as possible within 
>each species.  Either by temperature of pyrolysis or by fixed carbon 
>content.
>
>Let no one think their char analysis data points are irrelevant.  So far 
>I've not a master char reference by species anywhere else online.  Citations 
>for printed references are welcome, too.
>
>And thanks also to the other - here anonymous - individual who emailed me a 
>private reference pdf.
>
>Regards,
>
>Mark
>
>
>----- Original Message ----- 
>From: "Edward Russick" <erussick at gti-e.com>
>To: "Mark & Elena Gallmeier" <mgallmeir at comcast.net>; 
><gasification at listserv.repp.org>
>Sent: Wednesday, August 02, 2006 12:44 PM
>Subject: RE: [Gasification] Charcoal: Char Analyses?
>
>
>  
>
>>Check out www.woodgas.com/proximat.htm
>>
>>You are looking for PROXIMATE AND ULTIMATE ANALYSES
>>
>>
>>Edward J. Russick
>>VP - Sales
>>GTI
>>Box 1269
>>2 Central Ave
>>Box 1269
>>Madison, NJ 07940
>>Phone 973 - 360 - 0170
>>Fax 973 -360 - 0176
>>www.gti-e.com
>>erussick at gti-e.com
>>skype address  = gtiedw
>>
>>
>>-----Original Message-----
>>From: Mark & Elena Gallmeier [mailto:mgallmeir at comcast.net]
>>Sent: Wednesday, August 02, 2006 11:04 AM
>>To: gasification at listserv.repp.org
>>Subject: [Gasification] Charcoal: Char Analyses?
>>
>>To All,
>>
>>Can anyone suggest data sources for existing char analyses that were
>>conducted by wood species, either on the internet or in printed
>>references?
>>As many tree wood species as possible.  Minimum data should include ash
>>content, fixed carbon percentages, percent volatiles, energy per weight,
>>
>>etc.
>>
>>What I would most like to find are analyses by species, for a range of
>>fixed
>>carbon percentages within each species.  I am mainly interested in chars
>>
>>from North American tree species, but similar analyses for other
>>continents
>>will be very helpful too.
>>
>>Thanks,
>>
>>Mark
>>
>>
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>>
>>
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>>
>
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