[Gasification] Updated Update #2

[Tom Miles]

Jeff,

The slag encapsulation that you see is not unsual when heating straw.  Dirt
usually just bulks up the slag rather than melting itself. You rinse out
some of the principle slagging constituents (potassium, chlorine)in the
wetting and milling but you don't get them all. Even with the rinse you'll
stil have an ash content of 4-5% in the swtichgrass fireballs. If you
subject the ash to temperatures above 1450 F (750C) you'll get slagging.

One way to dilute the slagging is to mix in paper and switchgrass fireballs
or switchgrass and wood. 

Tom  

-----Original Message-----
From: gasification-bounces at listserv.repp.org
[mailto:gasification-bounces at listserv.repp.org] On Behalf Of Jeff Davis
Sent: Monday, January 15, 2007 2:22 PM
To: gasification at listserv.repp.org
Subject: Re: [Gasification] Updated Update #2

Dear Tom & All,


Tom wrote:
> If I'm reading it right,
> it is a downdraft gasifier.

Yes, open top.



> I note that you got a LOT of slag.

There was also a lot of dirt in with my fibres before it was fireballed. I
need to try to wash this out with water. I wonder if that would help with
the slagging?


> Try filling the tube with charcoal briquettes and then running.

I wonder how charcoaled switchgrass fireballs would work? Maybe they would
still slag...




Jeff


--
Jeff Davis

Some where 20 miles south of Lake Erie, USA

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