[Stoves] ***SPAM*** Netiquette request Re: [Biochar] Ceramic Philosophy: Request for Pyrolysis Biochar Stove Designs

[Christa Roth (bioenergylist)]

Dear all, the conversation is interesting but as a matter of (n)etiquette could I request some ground rules: 

Could everybody replying to a pots delete photos from the thread so that we don’t send all the same photos around over and over. The current post has grown to 8.3 MB.  
It’s not only clogging up peoples storage space but also eating up airtime as many people  (like me at the moment in Malawi) don’t have flat-rate internet access , but I pay early for every MB I download. 

Thanks for your consideration

Christa Roth 
stoves at foodandfuel.info


Am 12.02.2023 um 23:15 schrieb Paul Olivier <paul.olivier at esrla.com>:

Thanks so much, Stephen.

On Mon, Feb 13, 2023 at 3:33 AM Stephen Joseph <joey.stephen at gmail.com <mailto:joey.stephen at gmail.com>> wrote:
Hi Paul

Part of the process.  There are also sites on the clay where there are  salt impurities and crystal defects where thermal decomposition of the biomass is enhanced.   There is a really interesting paper that looks at the effects of a 2:1 on pyrolysis of paper mill waste that talks a little about this
Kumar, Mohit, S. N. Upadhyay, and P. K. Mishra. "Effect of Montmorillonite clay on pyrolysis of paper mill waste." Bioresource technology 307 (2020): 123161.

Another paper found that During pyrolysis, bentonite clay promoted Diels–Alder reactions that transformed furans to aromatic compounds, which decreased the bio-oil oxygen content and produced a fuel closer to being suitable for existing infrastructure.  Which reinforces that reference I gave before about clay increasing stability.

Karod, M., Pollard, Z.A., Ahmad, M.T., Dou, G., Gao, L. and Goldfarb, J.L., 2022. Impact of bentonite clay on in situ pyrolysis vs. hydrothermal carbonization of avocado pit biomass. Catalysts, 12(6), p.655.

I just found this really interesting paper that summarised many of the effects we have seen when we make these biochar mineral complexes. Olivelli, M.S., Fugariu, I., Torres Sánchez, R.M., Curutchet, G., Simpson, A.J. and Simpson, M.J., 2020. Unraveling mechanisms behind biomass–clay interactions using comprehensive multiphase nuclear magnetic resonance (NMR) spectroscopy. ACS Earth and Space Chemistry, 4(11), pp.2061-2072.
Free download at
https://tspace.library.utoronto.ca/bitstream/1807/107305/1/acsearthspacechem.0c00215accepted.pdf <https://tspace.library.utoronto.ca/bitstream/1807/107305/1/acsearthspacechem.0c00215accepted.pdf>

I think it is part of the reason why terra preta soils are so productive.  Not only is there clay  pyrolysed with the biomass but they put old pottery with the biochar into the soil.


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