[Gasification] reducing temp. of gasification

jai balwanshi jai764u at yahoo.com
Mon Oct 10 05:25:52 CDT 2011


sir can u tell me how i can reduce the tar in gasification in most simplest way?


Jai Balwanshi
Assistant Professor
Mechanical Engineering Department
VITS - Indore
Contact No. 9713281992

From: Viswanathan KS <viswanathanks at gmail.com>
>To: Discussion of biomass pyrolysis and gasification <gasification at lists.bioenergylists.org>
>Sent: Thursday, 6 October 2011 8:42 AM
>Subject: Re: [Gasification] reducing temp. of gasification
>
>
>Schoenen Dank and a Happy Dassera
>
>
>On Thu, Oct 6, 2011 at 8:31 AM, 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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