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pjc50today at 9:22 AM2 repliesview on HN

So apart from the clickbait, the reason why this is interesting is because it's a limiter for the often cited idea of clean green hydrogen from electrolyis. The current use of titanium and precious metals is, obviously, really expensive, so it's uneconomical to build something that only runs on "spare" electricity.


Replies

londons_exploretoday at 9:38 AM

I don't think the efficiency or longevity of electrolysis equipment is the limiting factor...

The limiting factor is that natural gas is very cheap and cracking it to make blue hydrogen is really easy at scale, and gives off CO2 which is useful for injection into wells to increase production. That sets a price ceiling of hydrogen.

At the other end of the scale, there are batteries to store 'free' electricity and resell later. That sets a floor price of electricity.

Between the floor price of the input and ceiling price of the output, there is no room for electrolysis, even at 100% efficiency, unless government policies mandate it or restrict batteries or blue hydrogen.

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SwtCybertoday at 10:23 AM

Yes, although I'd still want to see how much of total delivered hydrogen cost this actually moves