The Briefing Room
General Category => Science, Technology and Knowledge => Technology => Topic started by: Elderberry on April 19, 2020, 01:22:05 pm
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Watts Up With That by Eric Worrall 4/18/2020
Claim: “Bath Sponge†Metal Organic Material Makes Climate Friendly Hydrogen Automobiles Viable
The BBC reports a new highly porous metal organic sponge can hold large volumes of hydrogen at low pressure. But there are still a few issues to solve, like where to get all the hydrogen.
‘Bath sponge’ breakthrough could boost cleaner cars
By Matt McGrath
Environment correspondent
18 April 2020
A new material developed, by scientists could give a significant boost to a new generation of hydrogen-powered cars.
The product, with the glamorous name of NU-1501, has been built from organic molecules and metal ions which self-assemble to form highly crystalline, porous frameworks.
“It’s like a bath sponge but with very ordered cavities,†said Prof Omar Farha, from Northwestern University in the US who led the research.
Read more: https://www.bbc.com/news/science-environment-52328786 (https://www.bbc.com/news/science-environment-52328786)
The abstract of the study;
Here we report the simulation-motivated synthesis of ultraporous metal–organic frameworks (MOFs) based on metal trinuclear clusters, namely, NU-1501-M (M = Al or Fe). Relative to other ultraporous MOFs, NU-1501-Al exhibits concurrently a high gravimetric Brunauer−Emmett−Teller (BET) area of 7310 m2 g−1 and a volumetric BET area of 2060 m2cm−3 while satisfying the four BET consistency criteria. The high porosity and surface area of this MOF yielded impressive gravimetric and volumetric storage performances for hydrogen and methane: NU-1501-Al surpasses the gravimetric methane storage U.S. Department of Energy target (0.5 g g−1) with an uptake of 0.66 g g−1 [262 cm3 (standard temperature and pressure, STP) cm−3] at 100 bar/270 K and a 5- to 100-bar working capacity of 0.60 g g−1 [238 cm3 (STP) cm−3] at 270 K; it also shows one of the best deliverable hydrogen capacities (14.0 weight %, 46.2 g liter−1) under a combined temperature and pressure swing (77 K/100 bar → 160 K/5 bar).
Read more: https://science.sciencemag.org/content/368/6488/297 (https://science.sciencemag.org/content/368/6488/297)
More: https://wattsupwiththat.com/2020/04/18/claim-bath-sponge-metal-organic-material-makes-climate-friendly-hydrogen-automobiles-viable/ (https://wattsupwiththat.com/2020/04/18/claim-bath-sponge-metal-organic-material-makes-climate-friendly-hydrogen-automobiles-viable/)
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This is just a storage medium. It does NOTHING to ameliorate the fact that hydrogen is a net energy loser. It takes more energy to produce pure hydrogen than you get out of it. you have to break the chemical bonds that hydrogen forms with oxygen, nitrogen, and carbon and those bonds are very strong. Until you can make pure H2 with less energy input than you get out of it, it can never compete with gasoline/diesel.
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This is just a storage medium. It does NOTHING to ameliorate the fact that hydrogen is a net energy loser. It takes more energy to produce pure hydrogen than you get out of it. you have to break the chemical bonds that hydrogen forms with oxygen, nitrogen, and carbon and those bonds are very strong. Until you can make pure H2 with less energy input than you get out of it, it can never compete with gasoline/diesel.
Especially with oil where it is...
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The reason why carbon and nuclear fuels are cheap and efficient is their energy density.
Hydrogen doesn't have that, and it seems like a hydrogen filled sponge even less so.