Israeli researchers develop a new efficient chemical hydrogen storage
JERUSALEM,
-- Israeli scientists have developed an advanced technology for chemical
storage of hydrogen, Weizmann Institute of Science (WIS) in central Israel
reported on Wednesday.
The
technology may help increase the use of hydrogen fuel, bringing it within
efficient and safe reach.
Hydrogen-based
fuel is one of the most promising substitutes for oil, coal and gas pollutants,
producing only water when it is burned.
However,
one of the key obstacles to moving into a greener "hydrogen economy"
is the difficulty in storing hydrogen.
Thus,
to get enough power, the tank must either compress the hydrogen gas to high
pressures, or else cool it to the extremely low temperatures at which it
becomes a liquid.
Either
requires a large energy input to create and maintain these conditions, and
further expense must be added to ensure the safety of the vehicle.
Chemical
storage is a third option, using special chemical hydrogen carriers, but these,
to date, remain costly and complex.
The
WIS team developed a new type of liquid organic hydrogen carrier (LOHC) based
on readily available, inexpensive compounds called piperidines.
These
compounds, combined with a catalyst, produce hydrogen gas at relatively low
pressure and reasonable temperature.
This
system is already capable of generating hydrogen up to 5.3 percent of its
weight and works at over 90 percent efficiency.
Source:
(Xinhua)
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