[Stoves] Definition of char-making appliance

[Frank Shields]

Dear Crispin,

 

We need first to define 'char'.  A stove that ends producing black torrefied
wood is not a char maker, just a very poor stove.  

That definition  I suggest as the IBI does as " > 60% of the DAF being
carbon with H/C ratio < 0.7". OR my lower cost suggestion "loss in weight
under no-oxygen conditions at >450c to be less than a specified percentage".
Say less than 10% of the DAF fraction. 

 

Biochar is more than just the black stuff left over there should be a
qualifier attached. I think the char used for cooking (street vender for
example) could have more volatiles left over than biochar used for soils. It
gets complicated. Street vender char makes a very poor biochar used for
soils. 

 

Regards

 

Frank

 

Thanks 

 

Frank Shields

 

BioChar Division

Control Laboratories, Inc. 

42 Hangar Way

Watsonville, CE  95076

 

(831) 724-5422 tel

(81) 724-3188 fax

 <mailto:frank at biocharlab.com> frank at biocharlab.com

www.controllabs.com

 

 

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Crispin Pemberton-Pigott
Sent: Monday, May 06, 2013 8:07 AM
To: 'Discussion of biomass cooking stoves'
Subject: [Stoves] Definition of char-making appliance

 

Dear Char Producers

 

What is your opinion of this definition of a 'char making appliance'?

 

Char Making Appliance

Any appliance that derives heat largely from the pyrolysis of biomass in a
manner designed to produce, as a result of such combustion, a carbonaceous
byproduct high in carbon, useful as a fuel or as a 'biochar' and where such
product contains not less than 15% of the carbon in the original fuel.

 

If you have a suggestion for an alternative % of carbon, or wish to propose
a mass-based metric, please provide a supporting case.

 

Thanks
Crispin

 

 

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