[Gasification] Gasification Digest, Vol 11, Issue 76

[gfwhell at aol.com]

My Post regarding the use of two scuba tanks and a pressure washer as a means of compressing the products of a gasifier, were not  noticed, The addition of a vibrator to the tanks during  the compression of the gas would have eliminated most of the CO 2 into the compressing media which was water.each cycle would have removed much of the CO 2 present in the gas being compressed  to a pressure of 3500 psi

GF

-----Original Message-----
From: Peter Singfield <snkm at btl.net>
To: gasification at listserv.repp.org
Sent: Tue, 12 Jun 2007 10:49 am
Subject: Re: [Gasification] Gasification Digest, Vol 11, Issue 76




t 01:29 PM 6/12/2007 +0200, you wrote:
Peter,

Have you got any URL's for the household compressors?

Rex

i Rex;
I went and checked out that Chinese company -- they only make and sell
arge compressors -- 60 HP is their smallest unit.
A while back we discussed a small house system for compressing natural gas
- enough to fill one's car tank -- over night.
Those Urls were posted -- but for the life of me -- I can't find them now!!
I did find this Url -- which is about small high pressure air compressors
- to fill scuba tanks -- very interesting indeed -- check out the "mechanics"
http://pyramydair.com/site/articles/compressor/
So ya -- we know that can be done for reasonable costs in energy and capital.
Water absorption is the way many commercial operations are cleaning bio gas
ow.
Here -- get these to know more:
http://www.idosi.org/wasj/wasj1(2)/12.pdf
http://www.iea-biogas.net/Dokumente/Biogas%20upgrading.pdf
I believe one could use propane tanks filled with water at 150 to 200 PSI
o process the biodigester charge in batch mode -- once per day -- then
nce enough tanks are stored up -- use the small high pressure unit to
harge the high pressure tank.
But complicated and expensive --
A small DC PM refrigeration compressor drawing 60 watts of power or so --
ould probably be all that is required to keep a small biodigester emptied
nd compressed 96% of better methane as a result.
Semi-portable --
"12.pdf" give an excellent break down of how labor intensive rolling one's
wn energy at micro level can be -- this time for methane bio digesters.
Folks -- there is no free ride to replace cheap fossil fuels -- and when
ossil fuels do get rare one can see a time when a major part of all
umanity will be working just trying to replace "fuels" in alternative
anners.
Course -- a miracle could happen -- and modern life styles could change --
o much less energy is required -- much less.
Solar and wind keeps looking better and better -- eh??
My present line of development should be of major interest to gasifiers --
hat is fast charging battery packs using DC PM dynamos -- sop you run your
asifier/engine set up at max capacity for -- saying -- but 2 hours per day.
We are already applying this in practice here in Belize now using diesel
ngines and diesel fuel.
Then augmenting with wind and/or solar ---
Running an engine but 2 hours per day sure beats running one for 12 hours
er day -- and every day!!
Next is to start rolling our own power plant batteries using scrap car
atteries for mining the materials from.
Jim -- ever get word back on that inverter I sent you??
To make this very on topic for gasifiers --
Hey folks -- read well about "gas" cleaning methology -- 
http://www.psaplants.com/psa-process-overview.html
Now -- imagine a simple methology to clean producer gas -- but not just of
ars -- also of N2 -- CO2 -- thus greatly increasing it's combustion value
- and maybe then it can work stored "compressed"
And again -- we see how off topic trips open new doors of exploration for
asification.
Clean your gas well!!
Learn more about PSA processes!!

eter
At 01:29 PM 6/12/2007 +0200, you wrote:
Peter,

Have you got any URL's for the household compressors?

Rex

Peter wrote:
Compress the bio methane through a circulating water chamber -- the
water will dissolve the CO2 -- but not the methane -- think "Soft-Drink"
The water will not vaporize due to the pressures involved.
Result -- probably cleaner methane by far than what you would get in
natural gas.
There are a number of companies making house sized compressors for
charging 3000 psi into the composite methane tanks used in the methane
automotive systems now.
One O2 tank filled with water and put in line would probably dissolve
out all the CO2 in one car tank charge.
After the charge is over -- release the pressure on the O2 tank filled
with water -- and harvest pure -- or almost so -- CO2 gas.
That simple Dick --
Peter/Belize

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