[Stoves] FW: pot skirt efficiency estimates, scale-up

[Erin Rasmussen]

I've used biochar to filter distillate, it works very well at removing
impurities from ethanol. :-) It's terrible for regular wine making, as it
also tends to remove color and flavor components. 

I mainly used wood char (biochar) for filtering. Good distillers do between
3- 10 passes through the filters.  Particle size matters, but not as much
you'd think. 

cheers,
Erin Rasmussen
erin at trmiles.com

-----Original Message-----
From: stoves-bounces at lists.bioenergylists.org
[mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Frank Shields
Sent: Wednesday, September 19, 2012 1:04 PM
To: 'Discussion of biomass cooking stoves'
Subject: Re: [Stoves] FW: pot skirt efficiency estimates, scale-up

Now I'm wondering about biochar with a high activity level. 

-----Original Message-----
From: stoves-bounces at lists.bioenergylists.org
[mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
ajheggie at gmail.com
Sent: Wednesday, September 19, 2012 12:16 PM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] FW: pot skirt efficiency estimates, scale-up

[Default] On Wed, 19 Sep 2012 09:23:04 -0700,"Frank Shields"
<frank at compostlab.com> wrote:

>Hi All,
>
> 
>
>I've done this type of test a lot in the past. I don't think you can 
>get better than 95% ethanol via distilling even with the right 
>glassware to separate out the fractions.

Yes that's what's known as the constant boiling mixture, technically it
means the distillate is an azeotrope.

>In the past we used sodium metal to remove water from solvents
>(benzene) and think it might work for ethanol. Not sure I would try it 
>as those were the 'exciting' days in the lab. There must be better methods.


I've never tried it but the distillate can be dried by passing it through
corn grits?? split cereal grains that have been dried at above 100C, they
absorb the water and pass most of the alcohol

AJH

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