[Gasification] DIY GtL

[Anand Karve]

Dear Kevin,
currently the tar is used by villagers to smear wooden poles and tree trunks
to protect them from termites. But huge quantities are also used in road
construction. I think that the tar that is available in the market is a
product of petroleum refining. Nobody in India uses any process aimed at
retreiving tar from either the process of gasification or from charcoal
making. When we started our experiments with distillation of agricultural
waste, we found, that we were getting a lot of tar as a condensate. It was
then that I started making inquiries about the possible use of the tar and
discovered that there was a market for it. I don't even know if the tar
obtained through our process would be useful in termite control or road
construction.  .
Yours
A.D.Karve
On Mon, Jan 31, 2011 at 8:50 PM, Kevin <kchisholm at ca.inter.net> wrote:

>  Dear Dr. Karve
>
> ----- Original Message -----
> *From:* Anand Karve <adkarve at gmail.com>
> *To:* Discussion of biomass pyrolysis and gasification<gasification at lists.bioenergylists.org>
> *Sent:* Monday, January 31, 2011 7:49 AM
> *Subject:* Re: [Gasification] DIY GtL
>
> Dear all,
> tar is a valuable byproduct. Villagers buy it from a hardware shop at about
> US$1 per kg. So, we would prefer not to burn it.
>
> # What do they use the tar for? What kinds of "tars" can tehy use, and for
> what purposes? Mpre specifically...
> 1: Can they use the "blackwater" from gas scrubbing?
> 2: Do they perhaps only use "whole tar" as would, for example, be produced
> by trapping tars from a charcoal retort?
> 3: Do they perhaps only use a selected fraction of the "tar"
>
> # Your comments wil be very helpful.
>
> Thanks.
>
>
> Kevin Chisholm
>
> Yours
> A.D.Karve
>
> On Mon, Jan 31, 2011 at 8:46 AM, Thomas Reed <tombreed2010 at gmail.com>wrote:
>
>>  Dear Doug, Brian and all
>>
>> To what extent can you clean today's gas by passing it (cooled to about
>> 150 C) through a barrel of tomorrows REASONABLY DRY  fuel, thus permitting
>> you to burn all the tars AND finish drying the fuel?
>>
>> While a moisture content less than 20% is desirable for gasifier fuel, I
>> suspect it should not be bone dry for long runs because it becomes
>> autopyrolytic and won't retain a level pyrolysis zone.
>>
>> COMMENTS?
>>
>> Tom Reed
>>
>> Dr Thomas B Reed
>> President, The Biomass Energy Foundation
>> www.Woodgas.com <http://www.woodgas.com/>
>>
>> On Jan 30, 2011, at 9:06 AM, Brian D Paasch <brian at indianarenewables.com>
>> wrote:
>>
>>   On Jan 29, 2011, at 8:10 PM, doug.williams wrote:
>>
>> *To finger the problem of using industrial scale producer gas, is
>> that most large systems are not tar free, and if you need to compress the
>> gas, technical challenges come thick and fast.*
>>
>>
>> Doug,
>>
>> Oh goodness yes! We've not been willing to TOUCH the compression
>> challenges until we got our gas pretty darn clean. I'm cautiously optimistic
>> with where we are at on that task:
>>
>> http://www.youtube.com/watch?v=sNypVoZg3VA
>>
>> And right now we're planning on three separate compression steps with
>> additional filters between each step.
>>
>> And thanks for the pointer to your archives, I will certainly browse!
>>
>> -brian
>>
>>
>>
>>  ---------------------------------------
>> Indiana Renewables, LLC
>> 6600 Karyn Drive
>> Avon, Indiana 46123
>> ph: 317-272-7939
>> fax: 317-536-5326
>>
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>
>
> --
> ***
> Dr. A.D. Karve
> President, Appropriate Rural Technology Institute (ARTI)
>
> *Please change my email address in your records to: adkarve at gmail.com *
>
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-- 
***
Dr. A.D. Karve
President, Appropriate Rural Technology Institute (ARTI)

*Please change my email address in your records to: adkarve at gmail.com *
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