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[Dvice]This metal can turn salt water into drinking water and even fuel - Page 4

post #31 of 43
Quote:
Originally Posted by RandomPerson View Post
One problem though with mass desalination (I know this alloy can be used for also cleaning dirty water) is what to do with the excess salt. If it gets dumped into the ocean, salt concentrations will change possibly causing problems for the fish.
One always has to think of the effects of technologies, nothing will magicly solve our problems with no other affcts.
Still an interesting find though.
why not just add it back into distilled water to make more salt water.
    
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post #32 of 43
Quote:
Originally Posted by pale_neon View Post
why not just add it back into distilled water to make more salt water.
LOL That's an epic idea!

How expensive is it to make this alloy though?
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post #33 of 43
Thinking about it, Aluminum is extracted from Aluminum Oxide via Electrolysis. So you take the low energy state Aluminum Oxide and use A LOT of electrical energy to split it up into pure Aluminum and Oxygen, both of which are at a higher energy state. Now, think about the description in the article:

Quote:
The metal alloy is mostly aluminum, with some gallium, indium and tin thrown in for good measure. When submerged in water, the alloy causes a spontaneous reaction that boils the water to generate steam while also splitting off hydrogen gas. The steam can the be condensed into sterilized drinking water, while the hydrogen goes into a fuel cell to generate electricity. This process will continue until the aluminum is all used up, leaving non-toxic aluminum hydroxide waste behind, which you can either put in a landfill or eat if you have an ulcer.
So basically it does the reverse and strips some of the Oxygen in the H2O to recombine with the Aluminum and releases some unused Hydrogen and heat that creates steam. Which means that the actual special part is what the Gallium, Indium, and Tin do to start the reaction.

Inevitably this means that it will use more energy to make than it will generate, since as wikipedia states:
Quote:
"Because of its strong affinity to oxygen, it is almost never found in the elemental state; instead it is found in oxides or silicates."
And you clearly need the elemental Aluminum to make this work.

That's not to say this isn't cool. This sounds like a nice emergency heat source/remote water distillation/oxygen generator; just not something that would ever be considered a viable fuel. Given the Gallium, Indium, and Tin; I'm guessing this isn't even a good battery candidate (thinking of a fuel cell using electrolysis generated Hydrogen as a battery (electricity in to make Hydrogen, electricity out at the fuel cell)).
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post #34 of 43
Aluminium gets used up

>> less amazing and useful.
post #35 of 43
Quote:
Originally Posted by Semyon View Post
Aluminium gets used up

>> less amazing and useful.
It's the most common metal found in the upper crust... under other forms but still.
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post #36 of 43
Thats cool.
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post #37 of 43
yay
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post #38 of 43
Way to turn a primary limited resource into mass fuel which does nothing but promote 6billion individuals to war even more. From a conservationist perspective, this notion has the potential of causing ecological problems ranging from osmolarity(a MUCH bigger deal than one might initially think) of organisms from sea life to brackish waters. Therein, causing a cascading effect towards the entire pyramid of life.

In a more human-centric directive , turning water into fuel via mass desalinaton is the WORST idea for the survival of the human race, or any other considering all life forms need direct/indirect forms of water. In short, stop wasting research potential into dead tech?...i.e. adding layers of plate armor in a gunpowder age.... I simply laugh at the masses/pseudonerds(lacking real understanding of cause/effect relations of worldly proportions) whenever news media spinkles the word "hydrogen fuel" deriving from water sources(from which there could be no other) and everyone is hails genius. However, it does have niche market and does propel research of hydrogen spliting/molecule interactions, albeit not on a mass scale. In all honestly, until fusion/fission can be contained/harnessed and put en masse, fossil fuels will rein.

Has anyone ever played the Civ series? CHRIST.
Edited by Blindrage606 - 5/5/11 at 11:39pm
 
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post #39 of 43
Quote:
Originally Posted by Blindrage606 View Post
Way to turn a primary limited resource into mass fuel which does nothing but promote 6billion individuals to war even more. From a conservationist perspective, this notion has the potential of causing ecological problems ranging from osmolarity of organisms from sea life to brackish waters. Therein, causing a cascading effect towards the entire pyramid of life.

In a more human-centric directive , turning water into fuel via mass desalinaton is the WORST idea for the survival of the human race, or any other considering all life forms need direct/indirect forms of water. In short, stop wasting research potential into dead tech?...i.e. adding layers of plate armor in a gunpowder age.... I simply laugh at the masses/pseudonerds(lacking real understanding of cause/effect relations of worldly proportions) whenever news media spinkles the word "hydrogen fuel" deriving from water sources(from which there could be no other) and everyone is hails genius. However, it does have niche market and does propel research of hydrogen spliting/molecule interactions, albeit not on a mass scale. In all honestly, until fusion/fission can be contained/harnessed and put en masse, fossil fuels will rein.

Has anyone ever played the Civ series? CHRIST.
Dunno if you noticed but there's a lot of water in the sea.
And the end product of a hydrogen fuel cell is water...
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post #40 of 43
excellent! When heated to 200°C, aluminium hydroxide decomposes back into alumina and water! Easily reversible with concentrated solar heat. I like.
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