[Stoves] Burning Char

[Frank Shields]

Thanks for all the suggestions and info regarding the spontaneous
combustion. I think it is more chemical (oxidation of inorganics) as the
samples that do combust at a low temperature seems to contain a lot of
inorganics (perhaps from vegetative feedstocks). It makes me wonder if we
are not looking at a real potential problem. 

 

Frank

 

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Anand Karve
Sent: Sunday, October 14, 2012 9:28 PM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Burning Char

 

Dear Stovers,

charcoal contains many substances other than carbon. Iron used to be
extracted in ancient India using charcoal, which reduced the iron oxide to
metallic iron. The minerals in the charcoal got mixed with the iron to
impart special characteristics to the iron. We have an iron pillar in New
Delhi, which was erected some 1600 years ago. It has still not rusted.
Crispin sent me an article about this pillar and it says in the article that
this pillar had iron having a high phosphorus content. They have even named
the plant from which the charcoal was deriv. The spontaneous combustion of
char, reported by Frank, could be due to elemental phosphorus in the
charcoal. 

Yours

A.D.Karve

On Sun, Oct 14, 2012 at 11:38 PM, Frank Shields <frank at compostlab.com>
wrote:

 

Greetings Stovers,

 

 

Drying some biochar on paper plates at less than 100c and the plate starts
smoldering and actually glows red. The last batch that did this has very
high carbonates (not sure what that means). Most chars do not do this. Any
suggestions as to why? 

 

Thanks

 

Frank

 

 

Frank Shields

Control Laboratories, Inc.

42 Hangar Way

Watsonville, CA  95076

(831) 724-5422 tel

(831) 724-3188 fax

www.biocharlab <http://www.biocharlab/> .com

 

 


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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)



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