GAS-L: Re: Commercial gasification - Pressurised feeder

["James Joyce" <j.joyce@sri.org.au>]

Lasse, the Sugar Research Institute in Mackay have been involved in R&D on
pressurised gasification of bagasse for combined cycle power generation (>
20 MWe), for roughly the past 5 years.

We have developed a pressurised feeder for bagasse that does not use
lock-hopper or screw principles. It has been operated at a bit more than 20
Bar into a pressure vessel and is currently being patented (I am not sure
of the exact status of the patent). We have tested it with a few different
wood chip fuels and wood chip/bagasse blends. The technique does rely on
there being some moisture in the fuel for the gas seal to function
efficiently. The development unit would work fine at 1-5 MWt. If you would
like to discuss this more I suggest you contact our engineering group
leader Dr. Terry Dixon at t.dixon@sri.org.au

If you would like to discuss economics and aspects of gasification kinetics
I can talk to these topics, as SRI have examined the economics in the
Australian context and I built a laboratory scale pressurised gasifier for
my PhD thesis ... which is still to be completed (the thesis that is). I am
however no-where near as experienced as many of the people on this list.

Your organisation, CSIRO, have, in recent times, built and operated at
least one atmospheric wood gasifier that I know of. Are you aware of this ?

As of Monday I will be out of the country for a few weeks, so there could
be a delay in my response to you.


Regards,

James Joyce






                                                                                                                             
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                    08/08/02 09:39 AM              Subject:     gasification Digest 7 Aug 2002 23:39:56 -0000 Issue 201      
                                                                                                                             
                                                                                                                             






------------------------------

Date: Wed, 7 Aug 2002 12:02:13 +1000
To: gasification@crest.org
From: "Tobiasen, Lasse (DET, Lucas Heights)" <Lasse.Tobiasen@csiro.au>
Subject: Commercial gasification
Message-ID:
<1477BCDAAEAD124DBC95A550A19DB379746FDB@boa-ri.riverside.csiro.au>

Hi all,

I am working for an Australian governmental research organisation and we
are
currently reviewing available technology for usage of biomass residues for
energy production - a relatively new market in Australia.

In particular, I am interested in biomass gasification for the small scale
end of the market, say 1-5MW thermal. This could, for example, be usage of
a
relatively unproblematic fuel, woodchips, in a gasifier coupled with an IC
engine for electricity generation (waste heat usually has lower priority
here).

I was interested to know if someone could forward me details on suppliers
of
gasifiers which have reached commercial (or near commercial) status. I
realise there are many gasifiers out there, I am really only interested in
proven technology that has had substantial operating hours to back it up
(or
other substantial evidence). I want to basically discard the ones that
still
have tar-related, fouling, materials handling (or other) problems. I
suppose
the best thing would be a supplier who was willing to give a guarantee on
the technology.

If such a gasifier exists and is proven, the next question then is: has
anyone successfully handled more 'difficult' fuels such as straw or cotton
waste?

Thankyou for your help,

Regards,
Lasse

Lasse Tobiasen
Engineer
---------------------------------------------------
CSIRO Energy Technology
Lucas Heights Laboratory
PMB 7, Bangor, NSW 2234
New Illawarra Road, Lucas Heights, Sydney
Tel: (02) 9710 6877 (direct)
Tel: (02) 9710 6777 (switchboard)
Fax: (02) 9710 6800
e-mail: Lasse.Tobiasen@csiro.au
www.det.csiro.au
---------------------------------------------------









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