[Stoves] Analysis of emission profiles from charcoal produced from selected tree species by different pyrolysis methods

[Cookswell Jikos]

Thanks Nikhil,

How do you mean by this *''**There is always a trade-off between growing
the charcoal feedstock versus burning charcoal with higher efficiency''*
can both not be realistically achieved on scale? We know of a few
restaurants/BBQ joints here who do both.

*Best, *
*Teddy *








On Fri, Mar 8, 2019 at 5:20 AM Nikhil Desai <pienergy2008 at gmail.com> wrote:

> Teddy:
>
> Do you know carbon sequestration profiles of different tree species and
> crops?
>
> How does one address the issue of PAHs as an interim product to CO2, which
> is good, versus direct emissions of PAHs, for which there is no GHG
> computation?
>
> I suppose efficiencies are in some way linked to the shares of PAH and CO,
> CO2 in the combustion process, so that a higher-efficiency stove would
> produce fewer PAHs but greater CO2. If one were to address GHG-neutrality
> only in terms of CO2, this would seem to frustrate the desirable goal of
> more complete combustion.
>
> There is always a trade-off between growing the charcoal feedstock versus
> burning charcoal with higher efficiency. And if a stove were selected on
> the basis of higher efficiency rating as well as lower CO2 emission rates,
> it is by no means certain that it would succeed in real circumstances.
>
> Nikhil
> ------------------------------------------------------------------------
> Nikhil Desai
> (US +1) 202 568 5831
> *Skype: nikhildesai888*
>
>
>
> On Thu, Feb 7, 2019 at 12:48 AM Cookswell Jikos <cookswelljikos at gmail.com>
> wrote:
>
>> Good morning all,
>>
>> Being a big proponent of growing more of these types of indigenous trees
>> for charcoal in Kenya (we include free seeds with each stove purchase) I am
>> happy to see this report on the different emission levels from various
>> types of charcoal.
>>
>> How different emissions from charcoal would affect the taste of food is
>> anyone's guess, but it does lend credence to stories I have heard of why
>> chefs in the Middle East etc. insist on importing tons of illegal acacia
>> charcoal from Somalia.
>>
>> More tests on the dozens of other species of local trees that are
>> preferred for firewood/charcoal would be most interesting to read if anyone
>> has any that they could share.
>>
>> *''All the charcoal from the three tree species under study emitted
>> similar types of PAHs but at significantly different concentrations. A.
>> xanthophloea charcoal prepared by efficient pyrolysis emitted the least
>> concentration of PAHs. Thus, according to this study, using charcoal
>> produced from  A.  xanthophloea by efficient pyrolysis presents a better
>> opportunity to reducing exposure from PAHs emit-ted from biomass fuels.''*
>>
>>
>> https://link.springer.com/epdf/10.1007/s13762-019-02220-x?author_access_token=XDpVhLZRgWpLPgeDkoTvCfe4RwlQNchNByi7wbcMAY4TAzk706nlQbkDAKP1sFLIg30j6XGmh3a8qNepBVgX9Ho3rnVR3Bwh6UKPAk0PXABQcXH3pMGCxPXZphBhoV3PlFv8BcLjbyaIt4xOVZKisw%3D%3D
>>
>> Teddy Kinyanjui
>> Sustainability Director
>>
>>
>>
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>>
>>
>>
>>
>>
>>
>>
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