[Stoves] [Biochar] Ceramic Philosophy: Request for Pyrolysis Biochar Stove Designs

[Ronal Larson]

Gabriel and ccs (adding the stoves list (the predecessor “mother” of the biochar (terra preta) group you started with.  [note different address for Paul]

	Welcome as a first poster.  We need more potters on this list - as so many cook stoves are presently being made by potters.

	I write as husband of a potter.  I have tried to make several clay TLUDs.  I failed.   Cracked. Pretty quickly   But I still think that char-making can be done in ceramic stoves.
		There is some clay being sold with paper as an ingredient that is claimed to have minimal expansion as heated up (the exhaust gas temperatures are pretty impressive.  I have never heard of anyone using such clay.  I haven’t)
	
	The top of a TLUD will get up to cone 022 (dull red) in a minute or so, while the bottom is still room temperature.  Having the cylinder be segmented will help, but you also are trying to control air.  Not like heating up in a kiln.


	Kevin McLean has had considerable charcoal-making success with unfired large un-fired clay “bricks."  See his Sun24 website. The firing as a stove will do some hardening of the clay.  Too early to get lifetime data with Kevin’s nice low-cost approach.

	I wouldn’t worry too much about Terra Preta.  Very valuable discussions around 2000-2010 - but no connection to pottery. 
		 (One exception - I’ve seen some literature that the ancient Amazonians also obtained a product like that coming from a present day low-temperature approach called HTC, they using big clay urns)
	
	The sites www.biochar-international.org and www.biochar-us.org will give some good information.  Especially on webinars - some have been on stoves.

Ron


> On Feb 8, 2023, at 12:45 PM, Teel, Wayne <teelws at jmu.edu> wrote:
> 
> Gabriel,
>  
> Get in contact with Paul Anderson, , and he will help you from there.  He is a regular and valuable contributor to this list.
>  
> Wayne
>  
> From: main at Biochar.groups.io <mailto:main at Biochar.groups.io> <main at Biochar.groups.io <mailto:main at Biochar.groups.io>> On Behalf Of Gabriel Reed
> Sent: Wednesday, February 8, 2023 12:21 PM
> To: main at Biochar.groups.io <mailto:main at Biochar.groups.io>
> Subject: [Biochar] Ceramic Philosophy: Request for Pyrolysis Biochar Stove Designs
>  
> CAUTION: This email originated from outside of JMU. Do not click links or open attachments unless you recognize the sender and know the content is safe.
> Hello All,
> 
> First post in this group. 
> 
> I'm a ceramic philosopher doing some research here in Cali, Colombia and am interested in building pyrolysis stoves for an agroecology project called Fundcación Yūtopialab. If anyone has resources they can point me to specifically on the topic of Terra Preta and/or especially stove designs that would be greatly appreciated!
> 
> Cheers,
> 
> Gabriel
> 
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