[Gasification] reducing temp. of gasification

Thu Oct 6 05:23:13 CDT 2011

 Dear A.D.Karve

       Thank you for your open source  information, Thanks for sharing  very
innovative  problem solving practical work  and  the  excellent  results you
 obtained .The  energy demand is increasing every where ,
thus centralised  power production is not sustainable for developing country
.The combined , solar, bio gas and pyro gas  from biomass  can be ideal
solution and need to be practical too , but not yet made possible.
          Josuhua  Bogart observation  is indeed very important in this
context  that , as charcoal has has structure similar to sponge.Thus the
internal pore  of charcoal make possible  more increased surface areas.This
make possible physical adsorption , much compression, more gas adsorbed ,
less acids .The acids are known to inhibit the methane bacterias .Thus two
stage recirculation reactor  was found to reduce this problems , but we
faced start up problems  , as acids in the fist reactor .Even though the
technology can work in very large scale , developed in Europe , was found to
be problem  to be operated in rural areas this two stage bio digestions, not
simple one your biodigestor.

      In this regard making Co2 balance is an imporatant aspects .How much
c02 reduction is possible compared to conventional methane .as this c02
biochar is already proven  soil conditioner and c02 fertiliser.  There are
several published work about enhancements of biogas production, but not this
much 3 times . Thus making patent , after your detailed study of c02
integration of solar and biomass  can be practical approach for reduced
carbon small power production from  biomass and solar.The catalyst not only
can reduce  temperatures , can make possible steam reforming ,
more hydrogen , less c02 , more  c0 .This  co shift   to hydrogen  the later
in digestions , can make more methane , along with charcoal co2 fertiliser
 , natural gas Quality bio gas.Thus  integrated  pyrolysis  and biogas  can
be made possible  for community power production.Simple one stage
biodigestor can play key role  for this small power production.

Your truely
Pannirselvam P.V

On Thu, Oct 6, 2011 at 2:16 AM, Anand Karve <adkarve at gmail.com> wrote:

> The lumps were about 2 to 4 cm across.
> Yours
> A.D.Karve
>
> On Thu, Oct 6, 2011 at 11:20 AM, Joshua Bogart <joshua.bogart at gmail.com>
> wrote:
> > So in essence you are multiplying your surface area by using the internal
> > surfaces of the Charcoal which is a structure similar to a sponge. What
> size
> > charcoal are you using?
> >
> > On Wed, Oct 5, 2011 at 9:01 PM, Anand Karve <adkarve at gmail.com> wrote:
> >>
> >> Dear Wishwanathan,
> >> we are still working on the idea. It works. We have been able to
> >> reduce the size of the digester to 1/3. Charcoal has to be enclosed in
> >> a net bag. It does float in the initial stages, but later it absorbs
> >> water and becomes heavy and sinks.
> >> Yours
> >> A.D.Karve
> >>
> >> On Thu, Oct 6, 2011 at 10:30 AM, Viswanathan KS <
> viswanathanks at gmail.com>
> >> wrote:
> >> > Dear Dr Karveji
> >> > Your designed digestor for kitchen waste has been popular. Can this
> >> > digestor
> >> > be made smaller and therefore cheaper and more affordable for
> >> > households, if
> >> > it is filled with charcoal?
> >> > Charcoal of which size is used and the quantity to be used?
> >> > Will charcoal not tend to float in the digestor?
> >> >
> >> >
> >> > On Wed, Oct 5, 2011 at 9:22 AM, Anand Karve <adkarve at gmail.com>
> wrote:
> >> >>
> >> >> Dear Henry,
> >> >>  There are a lot of very simple ideas that need to be tested.  I am
> >> >> currently working on increasing the efficiency of biogas digesters
> and
> >> >> feel that it might be possible to reduce the size and the capital
> >> >> expense of a biogas system. For instance, when I filled the digester
> >> >> with charcoal, my system accepted three times the normal daily input
> >> >> and produced three times as much gas.
> >> >> How much electrical energy would be required by the electric arc to
> >> >> produce producer gas? One can perhaps achieve the same temperature
> >> >> with paraboloid mirrors and sunlight.
> >> >> Yours
> >> >> A.D.Karve
> >> >>
> >> >> On Mon, Sep 12, 2011 at 5:52 AM, Energy7 <Energy7 at telusplanet.net>
> >> >> wrote:
> >> >> > Hi All
> >> >> > I Hope this is not a double post ( I posted this from my I phone
> >> >> > earlier
> >> >> > this morning and it has yet to show up )...
> >> >> >
> >> >> > Dear A.D. Karve
> >> >> > My exact thought a while ago was to achieve this temperature with
> an
> >> >> > internal electric arc furnace. The resulting gas can be put thru a
> >> >> > catalyst.
> >> >> > Just lately was reminded by a colleague of the efficiency of
> electro
> >> >> > static
> >> >> > precipitators and am presently researching their compatibility with
> >> >> > producer
> >> >> > gas.
> >> >> > So : air tight electric arc furnace fed with co2 and preheated feed
> >> >> > stock>
> >> >> > catalyst>98%cyclone cleaning>precip> final water filter cooling
> >> >> > >dryer >
> >> >> > co2
> >> >> > removal > o2 injection >ice>recycle hot co2 exhaust to preheat feed
> >> >> > stock.
> >> >> > Just an idea.. maybe too complicated? Please send me your ideas.
> >> >> > HN
> >> >> > ----- Original Message ----- From: "Anand Karve" <
> adkarve at gmail.com>
> >> >> > To: "Discussion of biomass pyrolysis and gasification"
> >> >> > <gasification at lists.bioenergylists.org>
> >> >> > Sent: Saturday, September 10, 2011 11:41 PM
> >> >> > Subject: [Gasification] reducing temp. of gasification
> >> >> >
> >> >> >
> >> >> >> Dear All,
> >> >> >> one requires about 700C temperature for making producer gas. This
> is
> >> >> >> generally achieved by burning the feedstock itself, for which one
> >> >> >> introduces external air into the reactor. As a result, the
> producer
> >> >> >> gas gets diluted by the nitrogen in the air. If the process can be
> >> >> >> conducted in a closed vessel, which is heated from the outside,
> one
> >> >> >> can get combustible gas without all the nitrogen, but heating the
> >> >> >> feedstock inside a container cannot achieve the temperature that
> is
> >> >> >> required for producing producer gas, so that what one gets is
> >> >> >> primarily tar vapour. Has anyone thought of using a catalyst for
> >> >> >> getting pyrolysis gas at say 300 C? It would help me greatly, if
> >> >> >> such
> >> >> >> a catalyst were available.
> >> >> >> Yours
> >> >> >> A.D.Karve
> >> >> >>
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> >> >> >
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> >> >>
> >> >>
> >> >> --
> >> >> ***
> >> >> Dr. A.D. Karve
> >> >> Trustee & Founder President, Appropriate Rural Technology Institute
> >> >> (ARTI)
> >> >>
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> >> >
> >> >
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> >> >
> >>
> >>
> >>
> >> --
> >> ***
> >> Dr. A.D. Karve
> >> Trustee & Founder President, Appropriate Rural Technology Institute
> (ARTI)
> >>
> >> _______________________________________________
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> >
> >
> >
> > --
> > "A liberal is someone who feels a great debt to his fellow man, which
> debt
> > he proposes to repay with your money."
> > Skype: Joshua.bogart
> > Emial: Joshua.bogart at gmail.com
> >
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> >
>
>
>
> --
> ***
> Dr. A.D. Karve
> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>
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