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Israeli Researchers Produce Green Hydrogen with 90% Efficiency

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Re: Israeli Researchers Produce Green Hydrogen with 90% Efficiency

#4

Post by ben_w »

Interesting; I wonder if similar approaches will help make the fuel cells cheaper as well as hydrogen?

Even if not, even if vehicles remain fully electric (which is my assumption):

> The scientists said gray, black, and brown hydrogen release 9 to 12 tons of carbon dioxide for each ton of hydrogen produced. Yet, they correspond to 95% of all hydrogen currently produced worldwide for agricultural and industrial needs. Even if this green hydrogen does not help move a vehicle, it is a welcome way to curb the production of the gray and black kinds.

It's good to see them prompting all the other things this will also be useful for.

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On a separate topic: this is the second site in a row where the full-screen "we respect your privacy click here to agree" banner won't actually let me scroll down to any of the buttons.

I'm glad reader mode works, or I wouldn't be able to see any actual content.

Re: Israeli Researchers Produce Green Hydrogen with 90% Efficiency

#7

Post by IggleSniggle »

ben_w wrote: post #4

Interesting; I wonder if similar approaches will help make the fuel cells cheaper as well as hydrogen? Even if not, even if vehicles remain fully electric (which is my assumption): > The scientists said gray, black, and brown hydrogen release 9 to 12 tons of carbon dioxide for each ton of hydrogen produced. Yet, they correspond to 95% of all hydrogen currently produced worldwide for agricultural and industrial needs.…

I've started having the "impossible to navigate to the buttons" issue more and more. My best guess is that they just aren't made to work on my 5.4" phone screen. Which is absurd, since I still feel like it's "too big."

Re: Israeli Researchers Produce Green Hydrogen with 90% Efficiency

#9

Post by londons_explore »

ben_w wrote: post #4

Interesting; I wonder if similar approaches will help make the fuel cells cheaper as well as hydrogen? Even if not, even if vehicles remain fully electric (which is my assumption): > The scientists said gray, black, and brown hydrogen release 9 to 12 tons of carbon dioxide for each ton of hydrogen produced. Yet, they correspond to 95% of all hydrogen currently produced worldwide for agricultural and industrial needs.…

> The scientists said gray, black, and brown hydrogen release 9 to 12 tons of carbon dioxide for each ton of hydrogen produced. Yet, they correspond to 95% of all hydrogen currently produced worldwide for agricultural and industrial needs. Even if this green hydrogen does not help move a vehicle, it is a welcome way to curb the production of the gray and black kinds.

It will only do that if countries put laws in place to require green hydrogen. green hydrogen is not just expensive because it is new, but theoretically expensive because there are currently two routes to turn natural gas into hydrogen:

gas -> combined cycle gas turbine (40% loss) -> generator -> electricity

electricity -> electrolysis (10-50% loss) -> hydrogen

gas -> steam reforming (25% loss) -> hydrogen.

From this, you can make equations bounding the prices of gas, electricity, and hydrogen for any process to be profitable. It turns out that for the middle process to work out economically, the first must be non-economic. ie. the price of electricity must be very low while the price of gas is very high.

With gas just flowing out of the ground in the USA, russia, saudi arabia, and others, this will never happen. In fact, in many places the price of gas is so low we just burn it off because it isn't even valuable enough to collect or transport.

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