[Stoves] The Combined Heat and Biochar Gasifier

[Paul Olivier]

Ron,

PM2.5 and CO emissions of biochar kilns should not exceed the norms set by
the WHO.
One has also to take into account ambient air pollution.
Also, biochar kilns should not waste heat, since the demand for high-grade
heat is fairly endless.

If one needs a lot of heat and a lot of biochar, there is this 80 kW
gasifier:

[image: image.png]
[image: image.png]

Also, I designed torch gasifiers that are much cheaper than what you see
above.
A torch gasifier can be used to bake bricks, ceramics and so forth.
This is a 500-800 torch gasifier:

[image: image.png]
Since a torch gasifier does not have a multiplicity of burners, it costs a
lot less.
I also designed downdraft torch gasifiers.
It would be easy to design 200 kW torch gasifiers.

Many thanks.
Paul Olivier



On Wed, May 3, 2023 at 12:06 PM Ronal Larson <rongretlarson at comcast.net>
wrote:

> Paul:, Stoves list and (added) biochar list
>
> These are wonderful numbers.  Congratulations.
>
> I add the biochar list, where we seldom hear of emissions.
>
> I know that some biochar production facilities have to pass EPA
> regulations in the US (and similar in other countries).  Can anyone report
> what regulations they have had to meet (and how hard) - similar to Paul”s
> for WHO?
>
> RON
>
>
> On May 1, 2023, at 3:41 AM, Paul Olivier <paul.olivier at esrla.com> wrote:
>
> The PM emissions from my gasifier averaged 9.1 micrograms per cubic meter
> over 24 hours. In its definition of a clean cook stove, the World Health
> Organization stipulates that PM emissions should not exceed 25 micrograms
> per cubic meter. No problem here with respect to particulate matter: 9.1
> micrograms is well below 25 micrograms.
>
> According to WHO guidelines, carbon monoxide emissions should not exceed
> 28.40 ppm over a one hour period. The Lotus Fire Gasifier emitted very
> little CO over a one hour period: only 3.925 ppm (well within the WHO
> guidelines). The average CO emissions over 24 hours according to the WHO
> guidelines should not exceed 5.68 ppm. The average CO emissions of the
> gasifier was 0.491 ppm (again well within WHO guidelines).
>
> So my gasifier easily meets standards set by the World Health Organization
> in terms of particulate matter and carbon monoxide emissions. About 50% of
> Vietnamese households burn firewood. The health problems associated with
> this practice are truly horrendous. Burning firewood is one of the leading
> causes of mortality in Vietnam. If these households stopped burning
> firewood and used gasifiers, households would be protected from toxic
> levels of human carcinogens, and human health in Vietnam would improve
> dramatically.
>
> --
> Paul A. Olivier PhD
> 104/43 Phu Dong Thien Vuong
> Dalat
> Vietnam
>
> Louisiana telephone: 1-337-447-4124 (rings Vietnam)
> Mobile: 090-694-1573 (in Vietnam)
> Skype address: Xpolivier
> http://epwt.vn/en/home/
> [image: Slide29.JPG][image: Slide24.JPG][image: Slide35.JPG]
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
>
>

-- 
Paul A. Olivier PhD
104/43 Phu Dong Thien Vuong
Dalat
Vietnam

Louisiana telephone: 1-337-447-4124 (rings Vietnam)
Mobile: 090-694-1573 (in Vietnam)
Skype address: Xpolivier
http://epwt.vn/en/home/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Slide29.JPG
Type: image/jpeg
Size: 241855 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0003.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Slide24.JPG
Type: image/jpeg
Size: 216550 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0004.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Slide35.JPG
Type: image/jpeg
Size: 380039 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0005.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 1184026 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0003.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 1110719 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0004.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 2629203 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20230503/5a4cc8ee/attachment-0005.png>