[Gasification] Gasification Digest, Vol 11, Issue 76

[Peter Singfield]

At 01:29 PM 6/12/2007 +0200, you wrote:
>Peter,
>
>Have you got any URL's for the household compressors?
>
>Rex


Hi Rex;

I went and checked out that Chinese company -- they only make and sell
large 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
now.

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
to process the biodigester charge in batch mode -- once per day -- then
once enough tanks are stored up -- use the small high pressure unit to
charge the high pressure tank.

But complicated and expensive --

A small DC PM refrigeration compressor drawing 60 watts of power or so --
would probably be all that is required to keep a small biodigester emptied
and compressed 96% of better methane as a result.

Semi-portable --

"12.pdf" give an excellent break down of how labor intensive rolling one's
own 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
fossil fuels do get rare one can see a time when a major part of all
humanity will be working just trying to replace "fuels" in alternative
manners.

Course -- a miracle could happen -- and modern life styles could change --
so 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 --
that is fast charging battery packs using DC PM dynamos -- sop you run your
gasifier/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
engines 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
per day -- and every day!!

Next is to start rolling our own power plant batteries using scrap car
batteries 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
tars -- 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
gasification.

Clean your gas well!!

Learn more about PSA processes!!


Peter

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
>