[Gasification] reducing temp. of gasification

Anand Karve adkarve at gmail.com
Thu Oct 6 00:16:53 CDT 2011


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."
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)




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