[Gasification] reducing temp. of gasification

Wed Oct 5 22:20:19 CDT 2011

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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