[Bioconversion] Simple way to clean/concentrate Bio-Methane

[Peter Singfield]

More from my Arcs of the "OLD" Gas list stuff --

How to clean and store bio methane -- simply and on the "cheap"

Well Tom -- I am just following your advice and researching prior art --
but in my very own and so extensive -- hard drive arcs --

You know that ancient tale??

A war sets fire to the world's greatest library -- in which many single
copies of such important works exist -- if they burn -- then all that work
will be lost forever.

The librarian rushes about to save as much as he can -- but he has such
little time!!

He rushes around -- sees this so important book -- picks that up - -then
see the next one -- must save it - -so picks that up to -- soon he has to
many to carry -- but still he sees the next to important to lose work.

In the end the Librarian and his books burn up to ashes.

Hopefully I might avoid some of that using a hard drive or two (or three!!)

I have this very strange compulsion driving me to do this -- probably alone
the same lines Noah felt??

Peter/Belize (the Mad Inet librarian!!)

*************cleaning gas************

From: "renertech" <renertech at xtra.co.nz>
To: <gasification at crest.org>
References: <20010918032237.43078.qmail at web14007.mail.yahoo.com>
<005c01c13ffc$9121bb60$0382140a at Jim>
Date: Tue, 18 Sep 2001 22:54:42 +1200
X-MSMail-Priority: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400
Subject: Re: GAS-L: Green Gas + CO2

Jerry and Jim,

the removal of CO2  from biogas  is indeed easy  to do at the pressures and
temperatures that Jerry spoke of.     

New Zealand Farmers have been doing it for years.  Its like the packet cake 
recipes, you just add the water.

First of all, strip out the hydrogen sulphide by sucking the wet raw biogas
out of the gas holder through a drum full of flattened out rusty tin cans.
The rusty steel will react to make ferrous sulphide. To regenerate, just
open the drum and atmospheric oxygen will react to give metalic iron back
again for the next cycle, plus elemental sulphur and loads of heat so don't
do it in a plastic drum.    

Stripping the H2S and moisture will protect your
normal run of the mill air compressor before it pumps the gas @ 150psi into
the bottom of a  vertical   6"-8"  pipe 3/4 full of water, which is being
constantly pumped into the bottom  and bled off through a liquid pressure
reduction valve near the top.  Depending what you are fermenting, it can
almost come out like soda water.    

The methane comes out through a gas
pressure release valve at the top of the stripping column and goes on to an
old commercial LPG cylinder for intermediate storage before  final
compression.  There, our ingenious farmer boys use a pair of old double
ended hydraulic cylinders coupled end  on end.  One stroke of a three foot
cylinder will take you from  around 150psi to well over 2000psi  in one hit,
and all within the range of the cheapest of  hydraulic systems.  You can do
it with one double acting cylinder, but hydraulic oil at that pressure will
absorb a lot of methane and that does cause real problems.


Ken Calvert. renertech at xtra.co.nz