[Gasification] Charcoal: Char Analyses?

[Mike Redler]

Mark, et al,

Maybe this is a good time to mention how much I've been enjoying Cash! 
That's John D. Cash and Martin Cash.

Their book, Producer gas for Motor Vehicles, Copyright 1942, has been a 
good read so far (I'm on pg. 59). They also give a breakdown of 
pyrolysis products. However, if there is ever a discrepancy between 
results (Mark), this (below) is where I would put my trust.

I'm one of those people who has done a lot of research without actually 
doing anything except fooling around with a few coffee cans and a pair 
of tin snips. But, I'm trying my best to get up to speed.

Anyway, that's my two cents.

Good luck!

Mike

Tom Reed wrote:
> 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
>>