[Gasification] reducing temp. of gasification

[Anand Karve]

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
>> >>
>> >> _______________________________________________
>> >> Gasification mailing list
>> >>
>> >> to Send a Message to the list, use the email address
>> >> Gasification at bioenergylists.org
>> >>
>> >> to UNSUBSCRIBE or Change your List Settings use the web page
>> >>
>> >>
>> >> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>> >>
>> >> for more Gasifiers,  News and Information see our web site:
>> >> http://gasifiers.bioenergylists.org/
>> >
>> >
>> > _______________________________________________
>> > Gasification mailing list
>> >
>> > to Send a Message to the list, use the email address
>> > Gasification at bioenergylists.org
>> >
>> > to UNSUBSCRIBE or Change your List Settings use the web page
>> >
>> > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>> >
>> > for more Gasifiers,  News and Information see our web site:
>> > http://gasifiers.bioenergylists.org/
>> >
>>
>>
>>
>> --
>> ***
>> Dr. A.D. Karve
>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>>
>> _______________________________________________
>> Gasification mailing list
>>
>> to Send a Message to the list, use the email address
>> Gasification at bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>>
>> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>>
>> for more Gasifiers,  News and Information see our web site:
>> http://gasifiers.bioenergylists.org/
>
>
> _______________________________________________
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>
> for more Gasifiers,  News and Information see our web site:
> http://gasifiers.bioenergylists.org/
>
>



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