this post was submitted on 23 Mar 2025
185 points (97.0% liked)
Europe
4648 readers
1800 users here now
News and information from Europe 🇪🇺
(Current banner: La Mancha, Spain. Feel free to post submissions for banner images.)
Rules (2024-08-30)
- This is an English-language community. Comments should be in English. Posts can link to non-English news sources when providing a full-text translation in the post description. Automated translations are fine, as long as they don't overly distort the content.
- No links to misinformation or commercial advertising. When you post outdated/historic articles, add the year of publication to the post title. Infographics must include a source and a year of creation; if possible, also provide a link to the source.
- Be kind to each other, and argue in good faith. Don't post direct insults nor disrespectful and condescending comments. Don't troll nor incite hatred. Don't look for novel argumentation strategies at Wikipedia's List of fallacies.
- No bigotry, sexism, racism, antisemitism, dehumanization of minorities, or glorification of National Socialism.
- Be the signal, not the noise: Strive to post insightful comments. Add "/s" when you're being sarcastic (and don't use it to break rule no. 3).
- If you link to paywalled information, please provide also a link to a freely available archived version. Alternatively, try to find a different source.
- Light-hearted content, memes, and posts about your European everyday belong in !yurop@lemm.ee. (They're cool, you should subscribe there too!)
- Don't evade bans. If we notice ban evasion, that will result in a permanent ban for all the accounts we can associate with you.
- No posts linking to speculative reporting about ongoing events with unclear backgrounds. Please wait at least 12 hours. (E.g., do not post breathless reporting on an ongoing terror attack.)
(This list may get expanded when necessary.)
We will use some leeway to decide whether to remove a comment.
If need be, there are also bans: 3 days for lighter offenses, 14 days for bigger offenses, and permanent bans for people who don't show any willingness to participate productively. If we think the ban reason is obvious, we may not specifically write to you.
If you want to protest a removal or ban, feel free to write privately to the mods: @federalreverse@feddit.org, @poVoq@slrpnk.net, or @anzo@programming.dev.
founded 9 months ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Does that assume you're using external fossil fuels for the power? I don't see how that could add up otherwise.
Yes, it's definitely progress, but it's not perfect.
I think so, yes. It would be easier to be certain if I had the study right now. But even so, it appears that even in other studies, blue hydrogen is estimated to only reduce emissions by up to 25%. That's not nothing, but the vast majority of permissions continues, even though blue hydrogen is likely massively more expensive than gray hydrogen.
Fwiw, acoustic heat pumps are in development right now and they work without a refrigerant gas. That should fix the issue. :) For the moment, though,
But still probably cheaper than green hydrogen, at least in the short term. If you crack natural gas down to heavier hydrocarbons, burn them for the needed power and push the resulting CO2 into a deep reservoir there's no theoretical emissions. If the reservoir isn't as permanent as it seems or if the pipes leak obviously that changes, and compressing the CO2 can be difficult if the gas is even a little sour, so there's hurdles, but none of them seem like a deal-killer. That is, if a hydrogen economy is actually supported enough by regulation in order to develop.
Last I checked, megnetocaloric heat pumps were beginning development for commercial use. I'm really excited about that one, because the only moving part you need is a small pump to circulate the working fluid, and the fluid itself could be anything.
The studies I saw usually looked at two different levels of CCS, i.e. a "low" level of 30% CO2 is stored and a "high" level where 85% of CO2 is stored. Existing CCS plants routinely store less than those 30% of CO2 emissions, though, see e.g. the ADM Decatur plant:
I.e. in 3 years, with total emissions of around 13 Mt, they stored around 0.5 Mt, or around 4%. A couple years later, in 2024, it turned out that they caverns they used had leaked around 2% of the stored CO2.
^Pssst: CCS is a big scam^
Wow, I knew it was sketchy but not that bad. What about all the air-capture plants? I assumed they'd be processing it a similar way.
There's the option of just landfilling or reselling the carbon for a non-fuel use, I guess, but then the energy input consideration becomes very real. IIRC it's still less endothermic than splitting water, but you're introducing the risk that somewhere down the supply chain the carbon gets put back into the atmosphere, because carbon accounting is also very sketchy right now.