[Gasification] waste coffee grounds as fuel?

[Greg Manning]

 Greetings Jim, and List. (Seasons Greetings for that matter...)

I could stand corrected on this, but IMHO the coffee oils are the major
problem, both in the grounds, and in the raw beans, and plant. The oils
would cause clumping and slag/clinker formation in any downdraft units that
I know of. As far as any other style gasifiers, I have no knowledge.

 One would assume that the oils could be pressed off or out,  but there
might be a use or disposal problem on them.

Greg Manning



-----Original Message-----
From: gasification-bounces at listserv.repp.org
[mailto:gasification-bounces at listserv.repp.org]On Behalf Of jim mason
Sent: Tuesday, December 19, 2006 9:28 PM
To: gasification at listserv.repp.org
Subject: [Gasification] waste coffee grounds as fuel?


does anyone here have experience with using coffee grounds as gasifier fuel?

waste coffee grounds are curious in that they are already somewhat
processed.  they are the debris of plant reproductive matter, so would
likely be rather energy dense.  and in some cities, like my own, san
francisco, there is quite a supply of them, 24/7.

they would seem a good candidate fuel for a fluidized bed or kalle
type gasifier.

i remember the BEF "encyclopedia of pyrolysis, gasification and
combustion" had several papers with quantative studies of energy
density and gas compositions for various fuels.  but i don't remember
coffee in there.  and i can't find my copy of it at the moment, as i
think i lent it out.

so while i'm on this passing thought, does anyone here have any
experience with or knowledge they could pass on about this?

thanks,

jim

_______________________________________________
Gasification mailing list
Gasification at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
http://gasifiers.bioenergylists.org

--
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.409 / Virus Database: 268.15.25/593 - Release Date: 12/19/2006

--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.409 / Virus Database: 268.15.26/594 - Release Date: 12/20/2006