Comments on: 5.6 trillion metric tons of hydrogen may be buried below Earth’s surface https://www.isegoria.net/2024/12/5-6-trillion-metric-tons-of-hydrogen-may-be-buried-below-earths-surface/ From the ancient Greek for equality in freedom of speech; an eclectic mix of thoughts, large and small Thu, 28 May 2026 14:07:37 +0000 hourly 1 http://wordpress.org/?v=3.6.1 By: Adept https://www.isegoria.net/2024/12/5-6-trillion-metric-tons-of-hydrogen-may-be-buried-below-earths-surface/comment-page-1/#comment-3729677 Adept Thu, 26 Dec 2024 09:35:01 +0000 https://www.isegoria.net/?p=52376#comment-3729677 There are high-strength embrittlement-resistant alloys. Copper-beryllium, for instance, seems almost totally immune, and has extremely low hydrogen solubility and diffusivity. It also has a tensile strength that, at >1400MPa, surpasses even some of the so-called “ultra high-strength” steels. Beryllium isn’t really that scarce, so Cu-Be could possibly work for pressure vessels or as pipeline cladding.

]]> By: Bob Sykes https://www.isegoria.net/2024/12/5-6-trillion-metric-tons-of-hydrogen-may-be-buried-below-earths-surface/comment-page-1/#comment-3729552 Bob Sykes Wed, 25 Dec 2024 23:32:47 +0000 https://www.isegoria.net/?p=52376#comment-3729552 Whether or not hydrogen exists in such quantities is not relevant. Hydrogen cannot be liquified, except by very expensive cryogenic processes. So even at high pressure it had a low energy density.

Moreover there is the issue of embrittlement, especially of steel. This means hydrogen cannot be stored in pressure vessels or transported in pipelines. Hydrogen must be used where it is generated, most likely to generate electricity. This means that if hydrogen is a diffuse source, it is unusable. The is the same problem with gold in the ocean and metals in the asteroid belt: they are economically unrecoverable.

Next you will be telling me wind, waves, tides, and sunlight are free energy sources.

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