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I was also under the impression that Acetylene for
decades has been kept at reasonable pressures in the cylinders due to the carbon
or Kapok filling. I was also to understand that at above 15 psi Acetylene was
unstable and thus the need to use a filler to react with the gas.
Can some one put me to rights on this. If the above
is so then such cylinders have been around for as above decades and thus the
carbon, active carbon and Kapok are very old technology.
Active carbon filters are also used in some water
treatment systems that have been around for many years. can some one out there
confirm this also.
Doug
----- Original Message -----
Sent: Thursday, July 20, 2006 6:20
AM
Subject: Re: [Biofuel] breakthrough -
store CH4 at 500psi instead of 3600
You can get it made out of all kinds of things: wood, coal,
coconutshells, etc etc.
...and if you look on the University of Missouri
website, you findthis abstract:
"Synthesis and analysisof activated
carbon briquettes as an adsorbent for natural gas byDemetrius
Taylor Presented at the 2005
SummerUndergraduate Research and Creative Achievements Forum
ABSTRACT
Activated
carbon has been usedfor many years for its adsorptive properties. These
adsorptiveproperties are a result of its high surface area to density ratio.
Itachieves this through its activation process. During activation anetwork of
pores forms throughout the carbon matrix. These pores givethe carbon a very
large surface area for outside molecules to adsorbto. By maximizing the
distribution of different pore widths one cantailor the carbon to adsorb
molecules of differing sizes and duringvarious conditions. Our goal is to
develop a natural gas (95% methane)fuel tank that uses corncob produced
activated carbon as an adsorptivemedium. To do this we need to maximize the
distribution of porediameters that are between 1~2 nanometers (10~20
Angstroms). We arecurrently studying different activation methods and their
effect onthe carbon’s adsorptive properties. We have obtained
volumetricnitrogen and methane isotherms, gravimetric methane analysis
data,both scanning and tunneling electron micrographs, and small-anglex-ray
analysis data obtained from Argonne National Labs. From thisdata we have begun
producing activated carbon briquettes that willform the “core” of our tank. We
hope to expand the use of thesebriquettes to not only automotive fuel tanks
but to natural gastrapping and storage as well."
(http://undergradresearch.missouri.edu/events/conferences/abstracts/abstract-detail.php?abstractid=533
)
And notice that the opening words are "activated carbon." So
Kirk,here's your affirmation.
...Also noteworthy is that there's this
other abstract on theUniversity of Missouri website: "Fuel system design foran Adsorbed
Natural Gas Vehicle byAntonio
Howard Presented at the 2005
SummerUndergraduate Research and Creative Achievements Forum
ABSTRACT
With
energy and environmentalconcerns mounting as the global energy demand
increases, alternativefuels are drawing more and more attention. Natural gas
is one suchalternative fuel. However, the major shortcoming of natural gas
isthat it must be highly compressed in order to store at a comparableenergy
density to liquid fuels. For this reason, The Alliance forCollaborative
Research in Alternative Fuel Technology (ALL-CRAFT) aimsto develop
low-pressure, high-capacity storage technologies fornatural gas (methane).
Midwest Research Institute (MRI), an ALL-CRAFTpartner, is assigned the task of
developing a fuel tank and fueldelivery system for a natural gas-powered
vehicle modified to storethe natural gas using adsorbed natural gas (ANG)
technology. Thedesign work done thus far has dealt with the logistics of
modifyingthe vehicle’s fuel delivery system to accommodate the use of the
ANGtank in addition to the pre-existing compressed natural gas (CNG)tank. The
fuel system of a 2005 Honda Civic GX will be modified byinstalling an ANG fuel
tank to serve as an auxiliary tank to theexisting higher pressure CNG tank.
Additional capabilities will beadded while maintaining all of its original
functions. One suchcapability is running either from its CNG or the ANG tank,
withemphasis on maximizing mileage from ANG tank use. Moreover, the CNGtank
will be equipped to simultaneously fuel the engine and refill theANG tank upon
the latter’s depletion. An on-board CPU will beinstalled to control this
modified fuel delivery system and recorddata such as mileage accrued from each
tank. The MRI involvement inthe project is only at the end of the first of two
stages towardscompletion but this initial research should provide a solid
foundationto complete the design."
(http://undergradresearch.missouri.edu/events/conferences/abstracts/abstract-detail.php?abstractid=446
)
-John
On Jul 19, 2006, at 6:28 PM, Kirk McLoren
wrote:
I think he is making "activated charcoal" You can buy it in 55
gallon drums. I think the commercial product ismade from peach pits. You
need to transfer it quickly as it adsorbsall sorts of stuff. I think gas
mask filters use this stuff. Kirk
Jesse Frayne
<[EMAIL PROTECTED]>wrote:
How much energy does it take to make ground corn cobs into
hockey pucks? In this oxygen-free environment. So you can then burn
natural gas.
Jesse
--- Zeke Yewdall wrote:
> If it's like
the hydride storage of hydrogen, you > get it out of the "sponge" >
by heating it. And when you are putting it in, it > released alot of
heat > (just as if you were compressing gas). > > I bet small
contaminations (such as from biogass > produced methane) would >
poison the sponge -- I know that the hydride storage > tanks are pretty
> sensitive to that. > > Zeke > > On 7/18/06, Kurt Nolte
> wrote: > > > > Interesting indeed, but what I don't see
is how > densely the gas is > > thereafter stored. As in, for a
say 10-gallon gas > tank sized bundle of > > these briquettes,
how much gasoline equivalent > natural gas is being > > stored? A
gallon per gallon equivalent? Two? > Three? How much does the > >
whole assemblage, tank plus briquettes plus gas, > weigh compared to a
> > tank of gas or ethanol? For that matter, how's the > gas
extracted if the > > carbon pores "soak methane up like a sponge?"
> > > > These are the questions whose answers interest me >
most. > > > > -Kurt > > > >
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