[Gasification] Gasification Digest, Vol 8, Issue 6

[Anand Karve]

Dear Tom,
thanks a lot for information on lignin. I can cerrtainly use it in my
lectures and popular articles.
Yours
Nandu

On Wed, Apr 13, 2011 at 10:31 AM, thomas reed <tombreed2009 at gmail.com> wrote:
> Dear Ron and all
>
> A few comments on Ron's questions.
>
> Woody biomass is typically 15-25% lignin and the balance is cellulose
> and hemicellulose.  In cellulose all the carbons are attached to -OH
> or =O and so come off during pyrolysis as CO or CO2.
>
> Lignin has a benzene ring and is a  hydrocarbon polymer based on
> coniferyl or other alcohols monomers.  As such iti is not easily
> digested by microorganisms, and fallen trees in the forest rot leaving
> "lignin logs".   They fall apart when you kick them because the
> longitudinal cellulose fibers are gone.  Lignin's the precursor for
> charcoal and dictates the ~20% yield of charcoal from most trees.
> (Mesquite has 64% lignin and yields 30-40% charcoal.)
>
> Lignin was the precursor of all the coal in the world.  It evolved
> about 360 million years ago and made possible the enormous vascular
> trees that became fossilized as coal.
>
> Some charring processes yield more than 20%, but typically contain
> recondensed tars reabsorbed during manufacture.
>
> It is unfortunate that we don't have more analyses on the chemical
> composition of tars from each process.
>
> Tom Reed, Pyrologist
>
> On Monday, April 11, 2011, Ron Larson <rongretlarson at comcast.net> wrote:
>> List:
>>
>>    To Tom's list, I'd like to add
>>
>> 8.  What is the range (especially the upper limit) of weight percent char that is possible with each device?  (It seems pretty high with the GEK)
>>
>> Ron
>>
>> Sent from my iPad
>>
>> On Apr 11, 2011, at 1:00 PM, gasification-request at lists.bioenergylists.org wrote:
>>
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>>>
>>> Today's Topics:
>>>
>>>   1. Re: under 1MWe biomass CHP (Tom Miles)
>>>
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Message: 1
>>> Date: Mon, 11 Apr 2011 08:31:27 -0700
>>> From: "Tom Miles" <tmiles at trmiles.com>
>>> To: "'Discussion of biomass pyrolysis and gasification'"
>>>    <gasification at lists.bioenergylists.org>, <tombreed2009 at gmail.com>
>>> Subject: Re: [Gasification] under 1MWe biomass CHP
>>> Message-ID: <004d01cbf85d$87f57ad0$97e07070$@com>
>>> Content-Type: text/plain; charset="iso-8859-2"
>>>
>>> Gero,
>>>
>>>
>>>
>>> Questions for you and other gasifier suppliers:
>>>
>>>
>>>
>>> 1. What is the current population of your operating gasifiers?
>>>
>>> 2. Specifically, where are they?
>>>
>>> 3. What fuels do they use?
>>>
>>> 4. What is their peak operating capacity? (kWe/kWhth)
>>>
>>> 5. At what capacity are they typically operated? (KWe/KWhth)
>>>
>>> 6. What is their typical capacity factor (operating hours per year at full
>>> load equivalent(kWe)/8760 hours)
>>>
>>> 7. What new projects are in the pipeline? Or, where is the industry headed?
>>> More small scale? Mini-grid? Higher capacity?
>>>
>>>
>>>
>>> Thanks,
>>>
>>>
>>>
>>> Tom
>>>
>>>
>>>
>>> T R Miles Technical Consultants, Inc.
>>>
>>> Portland, OR USA
>>>
>>> tmiles at trmiles.com
>>>
>>> www.trmiles.com
>>>
>>> www.gasifiers.bioenergylists.org
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> From: gasification-bounces at lists.bioenergylists.org
>>> [mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of Gero
>>> Eckermann
>>> Sent: Sunday, April 10, 2011 10:36 PM
>>> To: 'Discussion of biomass pyrolysis and gasification';
>>> tombreed2009 at gmail.com
>>> Subject: Re: [Gasification] under 1MWe biomass CHP
>>>
>>>
>>>
>>> Hi Tom,
>>>
>>>
>>>
>>> I have also been corresponding with Pawel regarding our System Johansson
>>> Gasproducers.
>>>
>>> Herewith an update for you: Attached is the self-explanatory accolade for
>>> 2010 from Frost & Sullivan, UK.
>>>
>>>
>>>
>>> Kind regards,
>>>
>>> Gero
>>>
>>> CARBO CONSULT & ENGINEERING (Pty) LTD
>>>
>>>
>>>
>>>
>>>
>>>  _____
>>>
>>> From: Thomas Reed [mailto:tombreed2009 at gmail.com]
>>> Sent: 09 April 2011 10:25 PM
>>> To: Discussion of biomass pyrolysis and gasification
>>> Subject: Re: [Gasification] under 1MWe biomass CHP
>>>
>>>
>>>
>>> Pawel
>>>
>>> Community Power makes a CHP 100 kW unit, see www.gocpc.com.
>>>
>>> All Power Labs, Jim Mason, (Berkeley) makes a 10 kW power supply.  The heat
>>> would be easy to add.
>>>
>>> TOM REED
>>>
>>> 2011/4/4 Pawe? Paszkiewicz <p.paszkiewicz at openenergy.com.pl>
>>>
>>> Hello,
>>> To all members that could help.
>>> What's the most proven under 1MWe biomass CHP plant provider in your
>>> opinion?
>>> Please share your experience on efficiency/costs/sustainability.
>>>
>>> All best from a newbie.
>>> Pawel
>>>
>>> Pawe? Paszkiewicz
>>> Doradca Klienta Korporacyjnego
>>>
>>> tel.: +48 728 214 186 <tel:%2B48%20728%20214%20186>
>>> www.openenergy.com.pl <http://www.openenergy.com.pl/>
>>>
>>>
>>> ul. Niemierzy?ska 17a, 71-441 Szczecin
>>> tel.: +48 (91) 852 20 01 <tel:%2B48%20%2891%29%20852%2020%2001> , fax: +48
>>> (91) 852 20 03 <tel:%2B48%20%2891%29%20852%2020%2003>
>>> NIP: 851-313-52-35, Regon: 320926340, KRS: 0000370255
>>>
>>>
>>>
>>>
>>>
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>>> End of Gasification Digest, Vol 8, Issue 6
>>> ******************************************
>>
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>
> --
> NOTE:  PLEASE CHANGE MY ADDRESS TO TOMBREED2010 at GMAIL.COM
>
> Dr. Thomas B. Reed
> The Biomass Energy Foundation
> BEF, BEC, BER
>
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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 *