http://www.dailymail.co.uk/sciencetech/article-2382612/Have-holy-grail-cutting-emissions-Power-plant-claims-produce-hydrogen-splitting-water-sunlight.html
not economic yet, but is possible to do.
soon this could be investment of the countries to secure their energy supply.
fbs
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Have we found the 'holy grail' in cutting emissions? Power plant claims to
produce hydrogen by splitting water with sunlight
* The plant would use an array of mirrors to focus sunlight onto a huge
tower
* The tower heats up to 1,350 °C - enough to liberate hydrogen from
steam
* Scientists describe the process as the Holy Grail of a hydrogen
economy
By ELLIE ZOLFAGHARIFARD
PUBLISHED: 18:07 GMT, 1 August 2013 | UPDATED: 18:07 GMT, 1 August 2013
*
We have designed something here that is very different from other methods and
frankly something that nobody thought was possible before,’ said lead scientist
Professor Alan Weimer, from the University of Colorado at Boulder.
‘Splitting water with sunlight is the Holy Grail of a sustainable hydrogen
economy.’
Hydrogen could be used as a fuel for road
transport, distributed heat and power generation, and for energy storage.
Writing in the journal Science, the researchers explain how their plant would
adopt the same principle as using a magnifying glass to start a fire.
‘We can concentrate sunlight until it is really hot and use it to drive these
chemical reactions,’ said Dr Christopher Muhich, a member of the University of
Colorado team.
‘While we can easily heat it up to more than 1,350°C, we want to heat it to the
lowest temperature possible for these chemical reactions to still occur.
‘Hotter temperatures can cause rapid thermal expansion and contraction,
potentially causing damage to both the chemical materials and to the reactors
themselves.’
The quantity of hydrogen produced is entirely dependent on the amount of metal
oxide, a combination of iron, cobalt, aluminium and oxygen, and steam.
A working system would require a number of towers each surrounded by several
acres of mirrors.
Commercialisation of such a solar-thermal reactor is only likely to happen when
the economic conditions are right, claims Professor Weimer.
‘There would have to be a substantial monetary penalty for putting carbon into
the atmosphere, or the price of fossil fuels would have to go way up,’ he added.
Last year, British researchers claimed that they had also found the ‘holy
grail’ of the green economy by producing petrol from air for the first time.
Air Fuel Synthesis in Stockton-on-Tees, Teesside, made petrol using a small
refinery that synthesises the fuel from carbon dioxide and water vapour.
While the company said it used carbon dioxide extracted directly from the air
in their reaction, it is mainly using industrial sources of the gas until it is
able to improve the performance of 'carbon capture.'
Read more:
http://www.dailymail.co.uk/sciencetech/article-2382612/Have-holy-grail-cutting-emissions-Power-plant-claims-produce-hydrogen-splitting-water-sunlight.html#ixzz2b8sjw32k
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