Science > Physics > polymer chain can hold 63 kilograms of hydrogen per cubic metre
| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
24 Aug 2006 10:11:08 PM |
| Object: |
polymer chain can hold 63 kilograms of hydrogen per cubic metre |
Top hydrogen-storing polymer revealed (Aug 24)
http://physicsweb.org/article/news/10/8/15
A series of computer simulations has identified a polymer material with
a very large capacity for storing hydrogen that could be exploited in
fuel cells. Jisoon Ihm and colleagues at Seoul National University in
South Korea have discovered that polyacetylene with titanium atoms
attached to the polymer chain can hold 63 kilograms of hydrogen per
cubic metre -- more than any other similar material in their survey.
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| User: "hanson" |
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| Title: Re: polymer chain can hold 63 kilograms of hydrogen per cubic metre |
25 Aug 2006 01:32:05 AM |
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"Sam Wormley" <swormley1@mchsi.com> wrote in message
news:gTtHg.151778$1i1.30617@attbi_s72...
Top hydrogen-storing polymer revealed (Aug 24)
http://physicsweb.org/article/news/10/8/15
A series of computer simulations has identified a polymer material with
a very large capacity for storing hydrogen that could be exploited in
fuel cells. Jisoon Ihm and colleagues at Seoul National University in
South Korea have discovered that polyacetylene with titanium atoms
attached to the polymer chain can hold [1] 63 kilograms of hydrogen per
cubic metre -- more than any other similar material in their survey.
[They found that up to five hydrogen molecules can be attached to
each titanium atom in this particular form of polyacetylene, allowing
the material to reversibly store 7.6 wt% of hydrogen, or [1] ....]
[hanson]
PAc/Ti at a density of say 1 kg/dm^3 = 1000 kg/m^3 carrying
63 kg H2 would be 6300/1000 = 6.15% H2. So with/for their
7.6% H2 capacity it would mean that this PAc/Ti would have to
have density ~0.8 kg/dm^3. It is possible that Titanium with a
density ~ 4.5 kg/dm^3 and with PAc at ~ 0.4 kg/dm^3 at their
1:5 ratio could yield the such a compound. However, the devil
will be in the resilience and stability of charge/discharge cycling,
NOT to hydrogenate the conjugated system of the poly chain into
stable saturated non-chargeable HC structures.
All in all, I am impressed by their clever approach and time will
tell whether it'll reach and withstand the rigors of/in the market place.
hanson
..
ahahaha... ahahahanson
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| User: "Tom" |
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| Title: Re: polymer chain can hold 63 kilograms of hydrogen per cubic metre |
24 Aug 2006 10:14:32 PM |
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"Sam Wormley" <swormley1@mchsi.com> wrote in message
news:gTtHg.151778$1i1.30617@attbi_s72...
Top hydrogen-storing polymer revealed (Aug 24)
http://physicsweb.org/article/news/10/8/15
A series of computer simulations has identified a polymer material with
a very large capacity for storing hydrogen that could be exploited in
fuel cells. Jisoon Ihm and colleagues at Seoul National University in
South Korea have discovered that polyacetylene with titanium atoms
attached to the polymer chain can hold 63 kilograms of hydrogen per
cubic metre -- more than any other similar material in their survey.
lovely stuff, bet it goes off with a bang!
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| User: "Uncle Al" |
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| Title: Re: polymer chain can hold 63 kilograms of hydrogen per cubic metre |
25 Aug 2006 03:13:21 PM |
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Sam Wormley wrote:
Top hydrogen-storing polymer revealed (Aug 24)
http://physicsweb.org/article/news/10/8/15
A series of computer simulations has identified a polymer material with
a very large capacity for storing hydrogen that could be exploited in
fuel cells. Jisoon Ihm and colleagues at Seoul National University in
South Korea have discovered that polyacetylene with titanium atoms
attached to the polymer chain can hold 63 kilograms of hydrogen per
cubic metre -- more than any other similar material in their survey.
"allowing the material to reversibly store 7.6 wt% of hydrogen"
Octane is 15.9 wt-% hydrogen - and you get to burn the carbon, too,
for 4x10^7 J/kg C. Propane is 18.3 wt-% hydrogen. (Li-6)D is 25.1
wt-% hydrogen. We've got oodles of it left over from making H-bomb
secondaries. So?
Does anybody hallucinate that polyacetylene with all its hydrogens
replaced by naked titanium atoms can even exit much less exchange
hydrogen?
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf
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| User: "Sorcerer" |
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| Title: Re: polymer chain can hold 63 kilograms of hydrogen per cubic metre |
25 Aug 2006 04:05:54 PM |
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"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:44EF59E1.9CFD6D0E@hate.spam.net...
Hey Arsehole!
You are in the river of *****! *****!
Androcles
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