[Gasification] reducing temp. of gasification

Anand Karve adkarve at gmail.com
Sun Sep 11 23:09:30 CDT 2011


Dear Greg,
thanks for the tip. We have limestones of different grades in India. I
can try them out.
Yours
A.D.Karve

On Mon, Sep 12, 2011 at 12:49 AM, Greg Manning <a31ford at gmail.com> wrote:
> Greetings Anand, and list members.
>
> Dolomitic Lime (Limestone) was used as a catalyst to reform "coalgas
> (towngas)"  into a much cleaner "lampgas (limegas)" that had less
> energy in it, BUT was much cleaner as far as removal of tars from
> coal.
>
> The experssion "that preformer on stage is in the "limelight"" comes
> from this process, as mantel type lanterns (much like a "coalman
> lantern" (camping lantern) (where the company got it's name..
> "Coalman")  these footlamps where used on preforming stages prior to
> electric light in the late 1800's in England and Europe.
>
> Dolomitic lime is a slight varient on limestone.
>
> I have a small sample (about 30 kg.) here, would be happy to send a 2
> or 3 kg. sample to you for experimentation.
>
> The limestone has to be in the direct path of the gas flow, as close
> to the reactors output, (in the reactor would be the best location),
> break the sample into rough chunks and  insert in the hot gas path
> directly below the hearth.
>
> If ash flow is through the limestone, then some method of cyclic
> aggitation of the rocks is required.
>
> Regards,
> Greg Manning,
> Canadian Gasifier ltd.
>
>
>
> On Sun, Sep 11, 2011 at 12:41 AM, Anand Karve <adkarve at gmail.com> wrote:
>> 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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>
>
>
> --
>  Regards,
>
> Greg Manning,
> Brandon, Manitoba, Canada
>
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)




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