[Gasification] Gasification Digest, Vol 20, Issue 8

[David Coote]

On 17/04/2012 5:00 AM, gasification-request at lists.bioenergylists.org wrote:

Apologies, Luke. I edited the previous digest's text to make it shorter 
and inadvertently left a line of your earlier message.

I'd just spent the day in the country near Melbourne chatting with a guy 
who runs a small sawmill using salvage logs from arborists, farms, 
housing development etc We worked out roughly that he's generating about 
1500tonnes/annum of waste. He's very interested in using this for local 
decentralised energy production. There's an enormous amount of 
small-scale biomass assets dotted around the countryside.

Whoever first gets a small-scale gasifier up that meets Knoef et al's 
proposed criteria on whether or not a gasification technology is 
commercial could do very well. From the IEA workshop report (Knoef, 
Buhler and Babu 2007, p5):

1. Continuous integrated plant operation under commercial conditions for 
a minimum of 2,000 hours

2. Plant availability of 80% or higher

3. Profitable plant operation without government support; an example is 
the sustainable financial support from CHP operations with feed-in rate 
for electricity and heat

4. Plant operation without major modifications during the first year of 
commissioning

5. Process owners willing to specify investment and operational costs 
and offer or arrange performance, service, and maintenance guarantees

6. Process owners ready to offer 'turn-key' plants

Knoef et al also emphasise "that the development, optimization, and 
commercialization of first-of-a-kind BMG [Biomass Gasification] process 
are challenging and require substantial financial resources" (2007, p4) 
and that sale of "5 or more gasification systems of the same 
gasification island configuration" is a commercial criterion (2007, p1).

Knoef HAM, Buhler R, and Babu S 2007. Workshop No. 1 (2007-09): 
Situation Analysis and Success and Visions for Biomass Gasification IEA. 
Retrieved October 1, 2009 from 
http://media.godashboard.com//gti/IEA_BRU_11-07.pdf

>
> Message: 5
> Date: Mon, 16 Apr 2012 08:27:41 -0700
> From: "Luke Gardner"<lgardner at wwest.net>
> To: "Discussion of biomass pyrolysis and gasification"
> 	<gasification at lists.bioenergylists.org>
> Subject: Re: [Gasification] 1. Re: Wood Chip classificaton (Bruce
> 	Green)	Gasification Digest, Vol 20, Issue 7
> Message-ID:<26AEDCF905E548B1A56E427FF3A8FA88 at CrystalHP>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=response
>
> David,
> if your gonna pull my text off, pull my name off too.  thanks.  I agree with
> your message,,,,   its just not mine, the way it appears.
> Luke
>
> -----Original Message-----
> From: David Coote
> Sent: Monday, April 16, 2012 1:56 AM
> To: gasification at lists.bioenergylists.org
> Subject: [Gasification] 1. Re: Wood Chip classificaton (Bruce Green)
> Gasification Digest, Vol 20, Issue 7
>
> On 16/04/2012 5:00 AM, gasification-request at lists.bioenergylists.org wrote:
>    
>> Today's Topics:
>>
>>      1. Re: Wood Chip classificaton (Bruce Green)
>>      2. Re: Wood Chip classificaton (Peter&   Kerry)
>>      3. Re: Why would you want to make heating grade woodgas?
>>         (Peter&   Kerry)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Sat, 14 Apr 2012 20:29:41 -0400
>> From: Bruce Green<clascent at gmail.com>
>> To: Discussion of biomass pyrolysis and gasification
>> <gasification at lists.bioenergylists.org>
>> Subject: Re: [Gasification] Wood Chip classificaton
>> Message-ID:
>> <CACGGi+g3eze8xdDCwA_i31ZkX6xfWtNCAWUiEaX9DVgyWWpp4Q at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Hi all, If you really want to dry something cheap use a greenhouse. See
>> this technology  http://www.parkson.com/products/thermo-system   . Bruce
>> Green
>>
>> On Sat, Apr 14, 2012 at 2:25 PM, Luke Gardner<lgardner at wwest.net>   wrote:
>>
>>
>>      
> I thought about doing this as part of my research using a solar kiln. At
> it's simplest this might be wheel in an open mesh side container full of
> moist chip, leave for a few days, take out nice dry chip and
> combust/gasify. The problem, of course, is that the chip will only dry
> towards the outside of the container. Handling costs get restrictive if
> you put the chip in trays and placing the chip in some kind of tumbler
> involves extra expense for the tumbler and also some energy (and cost)
> to drive the tumbler.
>
> I was in Finland a few weeks ago where I was introduced to the concept
> of a drying trailer where air is actively moved across a relatively
> small container full of chip. Apparently this can dry the chip
> reasonably efficiently. I might revisit the solar kiln idea using this
> approach. As with everything in this area for a commercial operation
> it's all about the cost
>
> Cheers
>
> David
>
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>    

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