Re: DIG-L: biogas

[Paul Harris <paul.harris@adelaide.edu.au>]

G'day All,

If using a compressor be aware that methane (or something in biogas,
maybe even moisture) reacts with mineral oil, so you need synthetic oil
for lubrication. This is from memory, it took several compressor
failures before the problem was isolated.

Also remember that methane is explosive, so something OK for air may be
dangerous for methane!

HOOROO

Paul Harris
Agronomy and Farming Systems, The University of Adelaide
Roseworthy Campus, ROSEWORTHY, South Australia, 5371
ph +61 8 8303 7880, fx +61 8 8303 7979

----- Original Message -----
From: Carol Hoenig <hoenigc@azstarnet.com>
Date: Thursday, May 30, 2002 5:25 am
Subject: DIG-L: biogas

> Mike Barnett
> digestion@crest.org
> 
> Compressing biogas is no different than any other gas I assume no 
> oxygenis present. For low pressures, to fill a plastic bag a simple
> centrifugal unit would be used. For higher pressure a standard piston
> compressor would be fine.
> 
> You should make sure the water content and H2S is low for a piston 
> unit.There are all sorts of dryers, I even invented a simple 
> electrostaticunit but I haven?t found a manufacturer yet. The H2S 
> comes out if you
> bubble the gas through household bleach, it will form SO2 so you 
> have to
> be careful about that.
> 
> Let me know if I can be of more help.
> 
> 
> Prof. Stuart A. Hoenig, P.E., Ph.D
> Dept. of Agricultural & Biosystems Engineering
> University of Arizona, Tucson, AZ  85721-0038
> Tel: 520-887-3815
> Fax: 520-887-9727
> hoenig@ece.arizona.edu
> hoenigc@azstarnet.com
> 
> 
> 
> 
> 
> 
> 
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> 
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> 
> Beginners Tour of Biogas
> http://WWW.roseworthy.adelaide.edu.au/~pharris/biogas/beginners
> 
> 


Digestion List Archives:
http://www.crest.org/discussion/digestion/200202/

Digestion List Moderator:
Paul Harris, paul.harris@adelaide.edu.au
http://www.roseworthy.adelaide.edu.au/~pharris
List-Post: <mailto:digestion@crest.org>
List-Help: <mailto:digestion-help@crest.org>
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Other Digestion Events and Information:
http://www.bioenergy2002.org
http://crest.org/discussiongroups/resources/biomass/biogas/BIOGASMK.pdf
http://www.crest.org/articles/static/1/1010424940_7.html

Beginners Tour of Biogas
http://WWW.roseworthy.adelaide.edu.au/~pharris/biogas/beginners