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adrian_b11/07/20243 repliesview on HN

Deuterium is also not renewable, even if it is more abundant than uranium.

The H1-B11 reaction would be a much better energy source than anything else, but for now nobody knows any method to do it. There is no chance to do it by heating, but only by accelerating ions, and it is not known how a high enough reaction rate could be obtained.


Replies

rnhmjoj11/07/2024

I'm curious, what are you considering for stating that deuterium is not renewable? AFAIK there's an essentially limitless supply in the form of HDO in the oceans[1] and there are cost effective methods[2] to isolate it.

[1]: https://en.wikipedia.org/wiki/Semiheavy_water

[2]: https://en.wikipedia.org/wiki/Girdler_sulfide_process

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perihelions11/07/2024

Then wind power is not renewable either! The saturation wind power potential of this planet (250 terawatts?), integrated from now until this planet ceases to exist, is a finite number—and it is actually a smaller number than this planet's deuterium resource.

ben_w11/07/2024

> Deuterium is also not renewable, even if it is more abundant than uranium

Technology correct, in that after around a hundred trillion years even the red dwarf stars will have stopped burning hydrogen.

But last I checked as yet there is no known way to harness the only (and even then merely suspected) infinitely renewable energy source: the expansion of the universe.

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