this post was submitted on 16 Feb 2025
383 points (87.6% liked)

Science Memes

12330 readers
1293 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.

Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago
MODERATORS
[email protected]
[email protected]
[email protected]
383
Entropy? Never heard of it. (lemmy.dbzer0.com)
submitted 3 days ago* (last edited 3 days ago) by [email protected] to c/[email protected]
153 comments fedilink hide all child comments
 
you are viewing a single comment's thread
view the rest of the comments
[–] cynar 14 points 3 days ago (2 children)

There are 3 use cases I've seen.

  • Making fossil fuel power stations "clean".

  • CO2 recovery for long term storage.

  • CO2 for industrial use.

It's no good for the first, due to energy consumption. This is the main use I've seen it talked up for, as something that can be retrofitted to power plants.

It's poor for the second, since the result is a gas (hard to store long term). We would want it as a solid or liquid product, which this doesn't do.

The last has limited requirements. We only need so much CO2.

The only large scale use case I can see for this is as part of a carbon capture system. Capture and then react to solidify the carbon. However, plants are already extremely good at this, and can do it directly from atmospheric air, using sunlight.

[–] [email protected] 1 points 1 day ago (1 children)

It's poor for the second, since the result is a gas (hard to store long term). We would want it as a solid or liquid product, which this doesn't do.

Why wouldn't the device include or feed a compressor to liquidize the CO2? It takes just a little over 5 atm of pressure which is trivial.

[–] cynar 1 points 1 day ago

You also need to sustain 5 atm, with no leaks for years. Where is it being stored, and who's paying for the maintenance? All it would take would be a bit of civil unrest, or corruption, and the work could be undone in mass.

[–] [email protected] 1 points 2 days ago

The only DAC variant i could see working out is if it takes the CO2 from high-concentrated sources (such as portland cement factories) and transforms it into something practical, like liquid fuel or methane.

It could be leading to cheaper methane than from biological sources, because technological processes can have higher efficiency, and therefore lower prices.