(Photo: *CA* )
Heated chicken feathers can efficiently store hydrogen without a huge price tag, say chemical engineers at the University of Delaware. Annie Glausser reports.
YOUNG: Coming up – saying farewell to the green, green grass of home – But first this Cool Fix for a Hot Planet from Annie Glausser.
[SOUNDS OF CHICKENS]
GLAUSSER: Hydrogen fuel may have found a lucky wishbone. The key is to pluck a chicken.
Chemical engineers at the University of Delaware say toasted chicken feathers can outperform other hydrogen storage materials, and they do it at a fraction of the cost. Hydrogen—a potential green alternative to gasoline—is a finicky element, making it difficult to store and transport. As a liquid, it has to be kept at very low temperatures. As a pressurized gas, it takes up 30 times as much space as regular gasoline.
Using chicken feathers as a storage material allows hydrogen to be kept in a much smaller space. That’s because the feathers are made up of the protein keratin, which forms hollow strong tubes. When heated, the keratin tubes crosslink and strengthen, and at the same time become more porous. This dramatically increases its surface area, so it can absorb as much or more hydrogen than expensive carbon nanotubes or metal hydrides, two popular materials for storage.
The researchers estimate that a fuel tank made of chicken feathers would only carry a price tag of about $200 dollars, while a tank made of nanotubes or hydrides could be in the millions.
Our feathered friends may help ease us off fossil fuels but the science still needs some time to roost.
That’s this week’s Cool Fix for a Hot Planet. I’m Annie Glausser.
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