What do you think of using hydrogen as fuel?
I think that it is a bad idea. It may work in 50 years or so, but the big problem is that it takes more
energy to compress H2 than is contained in the H2. If compressed H2 were used, one would have
to provide a turbine to recover the energy stored in the compression. In addition, when you
compress the H2, its temperature goes up. How would we recover the energy of heat? And when it
is used in the vehicle, the decompression of the H2 causes cooling. How is this problem to be
solved?
H2 is a ways off unless someone develops a very absorbant sponge for H2 which can solve the
storage problems.
physorg.com/news85074285.html
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Donbot
For a contrary opinion, visit:
www.physorg.com/news84450917.html
Scientists have experimented with ways of storing hydrogen by locking the gas into metal lattices,
but metal hydrides only work at temperatures above 300°C and metal organic framework materials
only work at liquid nitrogen temperatures (-198°C).
Now scientists at the University of Bath have invented a material which stores and releases
hydrogen at room temperature, at the flick of a switch, and promises to help make hydrogen power
a viable clean technology for the future.
Although its fuel to weight ratio is insufficient to make an entire hydrogen tank from it, the
material could be used in combination with metal hydride sources to store and release energy
instantaneously whilst the main tank reaches sufficient temperature, 300°C, to work.
They hope to have the fully-working prototype ready within two to three years.
"The problem of how to store hydrogen has been a major bottleneck in the development of the
hydrogen power technology," said Dr Andrew Weller from the Department of Chemistry at the
University of Bath (UK).
I think that it is a bad idea. It may work in 50 years or so, but the big problem is that it takes more
energy to compress H2 than is contained in the H2. If compressed H2 were used, one would have
to provide a turbine to recover the energy stored in the compression. In addition, when you
compress the H2, its temperature goes up. How would we recover the energy of heat? And when it
is used in the vehicle, the decompression of the H2 causes cooling. How is this problem to be
solved?
H2 is a ways off unless someone develops a very absorbant sponge for H2 which can solve the
storage problems.
physorg.com/news85074285.html
Next
Donbot
For a contrary opinion, visit:
www.physorg.com/news84450917.html
Scientists have experimented with ways of storing hydrogen by locking the gas into metal lattices,
but metal hydrides only work at temperatures above 300°C and metal organic framework materials
only work at liquid nitrogen temperatures (-198°C).
Now scientists at the University of Bath have invented a material which stores and releases
hydrogen at room temperature, at the flick of a switch, and promises to help make hydrogen power
a viable clean technology for the future.
Although its fuel to weight ratio is insufficient to make an entire hydrogen tank from it, the
material could be used in combination with metal hydride sources to store and release energy
instantaneously whilst the main tank reaches sufficient temperature, 300°C, to work.
They hope to have the fully-working prototype ready within two to three years.
"The problem of how to store hydrogen has been a major bottleneck in the development of the
hydrogen power technology," said Dr Andrew Weller from the Department of Chemistry at the
University of Bath (UK).
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