this post was submitted on 25 Jan 2024
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[–] [email protected] 29 points 9 months ago (4 children)

Just be aware, hydrogen in almost all its presented formats is basically natural gas. 96% of hydrogen is sourced from fossil fuels.

So whenever you see shit promoting hydrogen, read it as something promoting natural gas/ fossil fuels.

[–] [email protected] 16 points 9 months ago (2 children)

I don't think it's really fair to throw all hydrogen into one category when we already have terms to describe where the hydrogen is sourced. Green hydrogen specifically is sourced via electrolysis with renewables and isn't really a problem.

Eventually we will get to a point where we have days where we have more solar energy than we can use and storing it in some capacity would be nice. I don't know if hydrogen is a good way to store energy to be used in fuel cells but it can be used by airplanes in ways batteries simply can't manage.

[–] [email protected] 2 points 9 months ago* (last edited 9 months ago) (1 children)

Eventually we will get to a point where we have days where we have more solar energy than we can use…

We already do. Electricity is free here at peaks or sometimes you even get paid for it. The main problem is balancing the network but batteries are an easier solution for that.

[–] [email protected] 3 points 9 months ago

Balancing a load is not the same as storing surplus load. Batteries are easier and more efficient but they are wildly expensive at scale and don't store power as long.

Personally I think pumped hydro is king in this field but that's not to say hydrogen can't exist at the same time. Airplanes can't use either for power and they can't be line fed but they can use hydrogen. The biggest drawback to green hydrogen storage is how inefficient it is and that's why I say using solar you have to use anyway makes it more viable.

[–] [email protected] -3 points 9 months ago (2 children)

Green hydrogen specifically is sourced via electrolysis with renewables and isn’t really a problem

It isnt that its a problem, its that its a fantasy. Its a useful fantasy that fossil fuel companies use to prop up hydrogen as the answer when what the mean is BAU.

Show me some major source of renewable generated hydrogen.

Otherwise, stop participating in the fantasy that gives fossil fuel companies a pass on green washing, because right now, there is no such thing as renewable hydrogen. Its 96% fossil fuels.

[–] [email protected] 4 points 9 months ago (1 children)

Green hydrogen is specifically not fossil fuels. Why are you getting after it like it's the same thing?

This is some peak absolutism. Especially in a world that is so completely controlled by capital and how fossil fuels have the capital to meet scale while every single little project that might one day make a difference is now apparently just fossil fuels because they don't have the capital to meet scale.

[–] [email protected] 0 points 9 months ago (1 children)

The challenge with green hydrogen is it needs to be created using green electricity. If the electricity isn’t green you’re still burning fossil fuels to create it. Creating hydrogen from fossil fuel generated electricity and then burning it is less efficient than just burning fossil fuels directly and results in a net increase not decrease in carbon emissions.

As we build additional green electricity generation, it’s currently more impactful to use that to lower grid demand on fossil fuel generated electricity than to use it make green hydrogen. If it’s used to make green hydrogen instead, we’re only delaying the day we finally eliminate fossil fuel electricity generation, which again benefits the fossil fuel industry.

Only at some point in the future, when we’ve completely eliminated fossil fuels from the electric grid, and have created an excess of green electricity generation does green hydrogen even become possible to create.

And even assuming we can achieve that some day. It’s less efficient to use electricity to create hydrogen to power vehicle than to use batteries. Anything that can be converted to connect to the grid directly or run on batteries is better doing that than running on hydrogen.

It’s not completely crazy… there are some potential use cases for green hydrogen that would make sense in some theoretical future where there’s an abundance of green electricity generation, allowing replacing of fossil fuels where more direct forms of electrification isn’t viable. Aircraft in particular come to mind here since hydrogen stores much more energy per kg than batteries, which are currently too heavy to be viable in aircraft.

But almost all promotion of hydrogen today, including green hydrogen, is either more greenwashing by the fossil fuel industry or the work of well meaning idealists that have unwittingly become their shills.

Green Hydrogen is not a solution for the vast majority of things it gets presented as a solution to.

[–] [email protected] 4 points 9 months ago

The challenge with green hydrogen is it needs to be created using green electricity.

That is exactly what green hydrogen is. It is exclusively hydrogen made with renewables.

[–] [email protected] 4 points 9 months ago (1 children)

It is not a fantasy. In fact, the opposite is true. The problem is that you are wildly out of touch with recent events. You are still pretending like it is 2004, not realizing that that was 20 years ago. Green hydrogen is a rapidly growing market and is following the trajectory of wind and solar.

[–] [email protected] 2 points 9 months ago (1 children)

The bonus of hydrogen power is it can eventually be used for energy storage when the grid is fully renewable. This is useful for transportation of energy to other parts of the world by shipping hydrogen, but also locally to offset dips in production or peaks in demand. However, currently it is absolutely greenwashing.

[–] [email protected] 2 points 9 months ago

The biggest point of me making a deal of this is that Hypx goes around propagandizing this shit, and if you arent paying attention, you might actually believe that hydrogen represent actually renewable tech. He spams this shit constantly and hasn't been banned on his lemmy home instance.

He's a completely bad faith actor.

[–] [email protected] 25 points 9 months ago (1 children)

I mean... Technically fossil fuels are renewable.... They're just renewing at a VERY slow pace

[–] [email protected] 14 points 9 months ago (1 children)

I learned recently coal is not renewable at all. We will never get more coal. Coal exists from a period of time when trees had cellulose but bacteria had no means of breaking down cellulose.

[–] [email protected] 3 points 9 months ago (1 children)

So we need to stick entire forests into a microwave, and then ship the sterile wood to mars, and bury it for a few billion years?

[–] [email protected] 2 points 9 months ago

Wouldn't work. You wouldn't be able to so. Pletely sterilise the wood. There will always be bacteria on it and even inside it.

[–] [email protected] 16 points 9 months ago (2 children)

This scam is already 20 years old, starting with George W. Bush’s 2000 election campaign platform of a “hydrogen economy.”

CleanTechnica: The Hydrogen Fuel Cell Scam — From George W. Bush & “The Big 3” To Toyota, Honda, & Japan

[–] [email protected] 5 points 9 months ago

He also popularized the phrasing "climate change" in his speeches which was an idea from republican political strategist Frank Luntz.

[–] [email protected] 8 points 9 months ago

Propane is profane.

[–] [email protected] 7 points 9 months ago

Hank Hill in shambles