Author Topic: Tech.jpg  (Read 45193 times)

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Offline The Latinist

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Re: Tech.jpg
« Reply #30 on: August 20, 2017, 05:43:49 PM »
Sounds like a great development in water-splitting:


But NOT an energy source.  Thecatalyst is consumed, and it requires more energy to produce it than is released in the reaction. It might make a good energy storage medium for fuel cells, depending on the numbers.  Interesting that the energy is stored as galvanic potential, though...

Not disagreeing but wondering where you got that it took more energy to produce the catalyst than the reaction released.

From 1) basic understanding of the conservation of mass-energy and 2) comments on the video by the verified account for the U.S. Army Research Laboratory, which posted the original video.
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Offline CarbShark

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Re: Tech.jpg
« Reply #31 on: August 20, 2017, 06:03:04 PM »
So likely but not verified.


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Offline albator

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Re: Tech.jpg
« Reply #32 on: August 20, 2017, 07:49:42 PM »
First, it's not a catalyst, it is used in the reaction, the advantage of their process is precisely  that a catalyst is not needed.
Secondly even if their aluminium transformation was free, the whole process wouldn't be economically viable if their goal was simply to produce H².
At room temp, the reaction is  2 Al + 6 H20 -> 2 Al(OH)3 + 3 H2.
So, it give 3 mole of H2 per 2 mole of Al or about 0.111 kg of H2 per Kg of Al.
And the hydrogen isn't 9 times more expensive per kilo than Al.

Offline CarbShark

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Re: Tech.jpg
« Reply #33 on: August 20, 2017, 08:26:49 PM »
Do you have links to papers or articles?


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Offline albator

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Re: Tech.jpg
« Reply #34 on: August 20, 2017, 08:52:02 PM »
That's highschool chemistry not sure it warrant an atricle. But here's a link. http://www2.uni-siegen.de/~pci/versuche/english/v44-10.html


Edit: Here's an article with the price and everything https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/aluminium_water_hydrogen.pdf
« Last Edit: August 20, 2017, 08:58:15 PM by albator »

Offline The Latinist

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Re: Tech.jpg
« Reply #35 on: August 20, 2017, 11:11:27 PM »
So likely but not verified.

This is pigheaded even for you.  They're oxidizing aluminum and using the energy produced to split water into hydrogen. Aluminum doesnt exist free in nature, so it has to be created.  You cannot, under any circumstance, get more energy out of oxidizing it than you put into extracting it; even if you start with pure aluminum oxide, you've got to electrolyze it in solution with molten cryolite at 1000°C, a process that Requires far more energy than it is possible to extract by oxidizing the resulting aluminum.
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Offline Soldier of FORTRAN

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Re: Tech.jpg
« Reply #36 on: September 02, 2017, 09:14:36 PM »
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Re: Tech.jpg
« Reply #37 on: September 03, 2017, 04:27:00 AM »
So their 3D-printer is malfunctioning.

It's all donuts now.

Offline Noisy Rhysling

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Re: Tech.jpg
« Reply #38 on: September 18, 2017, 07:25:39 PM »
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Offline Soldier of FORTRAN

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Re: Tech.jpg
« Reply #39 on: September 23, 2017, 07:03:36 PM »


Quote
Having some transparency about security problems with software is great, but Adobe's Product Security Incident Response Team (PSIRT) took that transparency a little too far today when a member of the team posted the PGP keys for PSIRT's e-mail account—both the public and the private keys. The keys have since been taken down, and a new public key has been posted in its stead.
https://arstechnica.com/information-technology/2017/09/in-spectacular-fail-adobe-security-team-posts-private-pgp-key-on-blog/

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Re: Tech.jpg
« Reply #40 on: September 23, 2017, 11:33:29 PM »
... in war the screams are loud and harsh and in peace the wail is so drawn-out we tell ourselves we hear nothing.

Offline Soldier of FORTRAN

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Re: Tech.jpg
« Reply #41 on: October 03, 2017, 04:28:44 PM »
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Offline Noisy Rhysling

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Re: Tech.jpg
« Reply #42 on: October 05, 2017, 06:01:31 AM »
Probably imported from China.
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Offline Friendly Angel

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Re: Tech.jpg
« Reply #43 on: October 23, 2017, 08:17:54 PM »
Amend and resubmit.

Offline CarbShark

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Re: Tech.jpg
« Reply #44 on: October 24, 2017, 01:59:54 PM »
Probably imported from China.

Nope, that's made in America.
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