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Ammonia Borane Could Store Hydrogen for Fuel Cell Vehicles

While electric vehicles have enjoyed a lot of recent attention, hydrogen fuel cell vehicles have somewhat fallen to the 5mg viagra wayside. Sure, we can build FCVs. Honda has begun commercial production of its FCX Clarity, fuel cell busses are on the road, and there are even hydrogen filling stations being opened in California. But the general sense out there is that hydrogen will “always be ten years away”, as I once heard it put (by an EV advocate, it should be noted).

One reason some people feel this way has to do with the problem of hydrogen storage. Because hydrogen’s energy density is http://jesperoffice.com/viagra-pill so low compared to gasoline, the equivalent of www.umlauf.de a tank of gas amounts to an enormous volume of hydrogen. Fuel cell vehicles today solve that problem by compressing the hydrogen gas into heavy metal tanks. These tanks, however, could use improvement. Much energy is lost simply compressing the gas, and some are concerned about the safety of a tank of highly pressurized, explosive gas .

For this reason, scientists are investigating alternative means of hydrogen storage. One chemist, Tom Autrey from Pacific Northwest National Laboratory, has been experimenting with a compound called ammonia borane (AB), which consists of hydrogen, nitrogen and good choice purchasing levitra boron – all relatively light elements. When AB is heated, it releases hydrogen gas for use in the fuel cell. When all the generic levitra uk overnight delivery AB is “spent”, hydrogen gas can be pumped in to http://www.absmag.fr/cialis-order regenerate more.

The breakthrough for Autrey came when he discovered a more efficient way to synthesize AB – something that could make or break a technology’s ability to go to scale. He is also looking into ways to recycle solvents in order to make the entire production process economical (and clean).

Other researchers are trying to do similar things with ammonia and metal hydrides. This guy uses tiny spheres of titanium, which hydrogen adheres to. As long as the material is light, hydrogen dense and feasible to levitra in uk produce, it is a good candidate. And if we manage to come up with some decent hydrogen storage devices, hydrogen cars may eventually NOT be ten years away.

Via H2Daily

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Comments (8)Add Comment
0
The article contradicts itself
written by G.R.L. Cowan, September 25, 2008
When all the AB is “spent”, hydrogen gas can be pumped in to regenerate more.

Oh, so it's easy to synthesize AB from its decomposition residue and hydrogen?

(Hint: no, it's impossible.)

The breakthrough for Autrey came when he discovered a more efficient way to synthesize AB

This is a clue that synthesis has been difficult, and thus confirms that the easy method of buying generic cialis hydrogenating the residue gets you hydrogen and residue.

So if people were determined to have hydrogen cars, and determined that the hydrogen should come from onboard ammonia borane, they would ship the residue -- which ideally would be boron nitride, an innocuous powder sometimes used in cosmetics -- to power plants, and these power plants would ship back ammonia borane.

Ammonia borane is highly combustible. See my website for an alternate proposal involving boron, but no hydrogen.
0
I thin storage is a relatively minor fac
written by Doug, September 25, 2008
A simple compressed-hydrogen tank is generic viagra soft tabs probably quite adequate, and can probably have a similar safety level as today's gasoline tanks.

The real problem is twofold: (1) massive energy losses (ratio of 4:1 or so) in creating the hydrogen, especially from electricity (the loss due to compression for storage is minor in comparison); and (2) lack of existing hydrogen-transportation infrastructure.

Infrastructure becomes less of an issue if you adopt the cost viagra model of generating the H2 at each fillup point, drawing the energy from the electric grid. But that still leave the huge inefficiency -- an electric car charging at that station would ge 3x to 4x the miles from the same electricity going into the station vs. filling it with hydrogen.

But if battery technology hits a wall in the next 10 years or so, causing a relatively permanent need for hybrid vehicles (especially for large, long-haul motor-driven ones like semi trucks or ocean freighters), then hydrogen may have a role to play as the secondary fuel source, as its inefficiencies are nowhere near as bad as biofuels (well, cellulosic ethanol anyways; I don't know about biodiesel from algae)).
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H2 Storage
written by Adam St. John, September 26, 2008
When writing about hydrogen storage methods, it's more important to http://cambridgeacademyaz.com/canadian-viagra-scam note the gravimetric and volumetric energy densities of each storage method compared to traditional fuels.

This also leads to discussion about efficiency and energy losses as Doug has mentioned.

Some storage methods perform well, but you have heat them to over 300 C. Some methods require cryogenic temperatures. Some methods require chemical reactions. Most are impractical, but serve as good starting points.

My main point is that there are and http://www.calamusdesign.it/buy-cheap-generic-cialis will continue to be many new "discoveries" in hydrogen storage materials, but rarely are the http://www.unifem.it/professional-levitra disadvantages pointed out in any general article.
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...
written by Uncle B, September 26, 2008
The system needs and organic intermediary, a bug that eats hydrogen, forms preferably a liquid or solid from it, then releases it on burning. If the intermediary included CO2 that would be great. Time for the boys making oil with E Coli to catch up and make Liquid fuel from hydrogen, CO2, and sunlight, perhaps with some sugar thrown in, with a hungry little GM bug! The sooner the better!
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...
written by Nick, October 01, 2008
There is and will not be a re-newable fuel infrastructure until the american public demands it, and the government should give tax incentives for the companies who up this infrastructure.
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written by dalmuti509, October 02, 2008
Compressed hydrogen doesn't need to be shipped or even stored in large quantities. It could be produced on-site at the fuel station or home. Honda is planning on producing home hydrogen fueling stations to coincide with their hydrogen cars as they are more production ready. This is a win-win situation for the gas stations and the consumers as there is no middle man to best online cialis hike up the price.
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written by Gary Brown, October 28, 2008
The Honda filling station produces Hydrogen locally, via electricity generated from photovoltaic cells on-site. Seems like a perfect solution until you learn that the quantity of H2 produced will fill only one or two auto H2 tanks per week(?) compared to the several hundred(?) fill-ups sold per day in a normal gas station. Matching that capacity would require an H2-solar filling station to install solar panels from horizon to horizon, roughly. And that is only for one station, not the buy canada levitra two or three that we now have on every other intersection in the country.

Using that same locally generated solar electricity to charge the batteries in EV cars gets us four times as many cars filled up that week, for a total of generic for tramadol eight, when what we need is a thousand. Local power generation just isn't going to get us anywhere, unfortunately. We have several desert areas in the country now going to waste however, which probably could use a little shade, and nary a snail-darter in sight.
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Big oil still around!
written by Aquariums, September 16, 2013
"hydrogen cars may eventually NOT be ten years away."?? As long as big oil will be around..these kind of cars will be developed but not sold to us! these is cialis 20mg tablets a huge amount of money to be made from oil..still!
Sean

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