[Gasification] waste coffee grounds as fuel?

[Tom Miles]

Jim,

Go to the the Gasification web site http://gasifiers.bioenergylists.org/ 

In "Search Discussion Archive" enter "coffee". You'll find some information
from Ken Calvert on his experience with coffee in Papua New Guinea.

They should gasify as readily as they burn. Spent gounds would by leached of
any ash consitutents.  

Why gasify them? As fuel for a coffee roaster?  

Tom   

-----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 7:28 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