[Gasification] Cellulose Gas and Biochar option

[Anand Karve]

Dear Tom.
if you looked at the way the TLUD stove operates, one realises that the
gases generated at the combustion zone pass through the char that is
generated by the system. Can one assume that these gases are adsorbed, at
least to some extent, by the char through which they are passing, and that
the tar in the gases blocks the pores in the char? I made char out of 5
samples of dry leaves, collected from underneath different species of
trees, and one sample of bamboo. Literature says that charcoal from bamboo
has half the adsorptive value of the commercially available activated
charcoal. I therefore tested the absorptive value of all the samples and
found to my surprise that their absorptive value ranged from 4 to 8% of
that of commercially available activated charcoal. Even bamboo charcoal did
not show the expected 50% absorptivity. Incidentally, I have tested off and
on during the last 10 years, the effect of charcoal on crops. I used the
charcoal obtained by using our TLUD kiln. I never saw any positive effect
on any crop.
Yours
A.D.Karve

On Thu, Feb 6, 2014 at 3:06 AM, Tom Reed <tombreed2010 at gmail.com> wrote:

>  Dear Tom Miles and all
>
> WWII gasification converted all the fuel into a low quality (150Btu/scf)
> gas that required considerable cleanup. Before use in engines.
>
> Now that we recognize the value of biochar as
>
> O. A soil amendment
>
> O. Reducing global warming
>
> a second option is more attractive.
>
> In the TLUD stove and larger (eg 33 gal garbage can) only the cellulose
> burns, giving a cleaner gas
>
> C6H10O5 + 1/2 O2 ===>
> 6O +  5 H2
>
> Plus. biochar for addition to the soil.
>
> Comments???
>
> Tom Reed
>
>
> From Tom Reed
>
> AKA
>
> Dr Thomas B Reed
> 508 353 7841
> Www.Thomas Reed Inventions .com
> Tombreed2000 at gmail.com
>
> On Feb 5, 2014, at 4:15 PM, "Tom Miles" <tmiles at trmiles.com> wrote:
>
>   *PERFORMANCE STUDIES ON DOWNDRAFT GASIFIER WITH BIOMASS ENERGY SOURCES
> AVAILABLE IN REMOTE VILLAGES *
>
> V. ChristusJeya Singh, S. Joseph Sekhar and K. Thyagarajan
>
> *DOI : *10.3844/ajassp.2014.611.622
>
> *American Journal of Applied Sciences*
>
> Volume 11, Issue 4
>
> Pages 611-622
>
> *Abstract *
>
> Increasing global concern over the environmental issues and depletion of
> fossil fuels, significant interest has been shown by the researchers to
> develop alternate energy technologies like biomass, biogas, solar to meet
> the future energy demand. The prediction of the performance of different
> biomass energy sources in gasifiers is needed for the implementation of
> this technology to fulfil the need of decentralized heat and power
> applications, relevant to remote villages. This study presents the
> theoretical and experimental studies conducted on a 50 kW downdraft biomass
> gasifier with various biomass materials such as wood, coconut shell, rubber
> seed kernel and coir pith which are generally available in villages.
> Two-zone kinetic equilibrium model approach is used to predict the
> composition and temperature of the producer gas. The influence of
> equivalence ratio on the reaction temperature, quality of producer gas and
> gasifier conversion efficiency are discussed. The experimental and
> theoretical studies show that the rubber seed kernel can be effectively
> used as a feedstock of the biomass gasifier to meet the rural energy demand.
>
> Singh, V.C., S.J. Sekhar and K. Thyagarajan, 2014. Performance studies on
> downdraft gasifier with biomass energy sources available in remote
> villages. Am. J. Applied Sci., 11: 611-622.
>
> http://thescipub.com/abstract/10.3844/ajassp.2014.611.622
>
>
>
>
>
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
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