2 ms·

you can inject it into peridotites and let it mineralize. there is enough exposed peridotite outcrops in the world that we could inject all the co2 produced and

you can inject it into peridotites and let it mineralize. there is enough exposed peridotite outcrops in the world that we could inject all the co2 produced and store it there indefinitely. this process also produces elemental hydrogen.

cjbenedikt 10mo ago
Do you have any links on research on that? Serious question.
- gus_massa 10mo ago
  Someone proposed to make giant beaches of malachite and let the sea break the rocks. Malachite has two -OH that can be replaced by a CO3= and so capture the CO2. I can't find a good link now, but at least it's the only method I know where it's not obvious that requires a huge amount of energy that makes the whole process net negative.
- mnky9800n 10mo ago
  Yes. For example: https://www.pnas.org/doi/10.1073/pnas.0805794105 https://www.pnas.org/doi/10.1073/pnas.0805794105 Peter Kelemen has written a lot of papers on this topic. Here is a more recent paper that I wrote together with Peter and others currently in review: https://eartharxiv.org/repository/view/9651/ https://eartharxiv.org/repository/view/9651/ This is more about the mechanics of how the rock breaks to allow fluids to move around. And here is another paper currently in review that we coauthored about how we know there’s gas moving in the system and therefore hydrogen is being produced: https://essopenarchive.org/users/543018/articles/1363688-enigmatic-harmonic-tremors-at-the-oman-drilling-project-multi-borehole-observatory-cultural-noise-or-subsurface-fluids https://essopenarchive.org/users/543018/articles/1363688-eni... Tbh I have no idea why we didn’t submit these to arXiv instead of these other preprint servers.
  - Gravityloss 10mo ago
    Thank you for this, it's very illuminating and awesome news. I think it's worthy of its own submission as well (besides being very on topic on this subject here too).
    - mnky9800n 10mo ago
      I would be happy to have my papers on the front page of hacker news lol. So far it doesn’t happen.

cjbenedikt 10mo ago

Do you have any links on research on that? Serious question.

gus_massa 10mo ago
Someone proposed to make giant beaches of malachite and let the sea break the rocks. Malachite has two -OH that can be replaced by a CO3= and so capture the CO2. I can't find a good link now, but at least it's the only method I know where it's not obvious that requires a huge amount of energy that makes the whole process net negative.
mnky9800n 10mo ago
Yes. For example: https://www.pnas.org/doi/10.1073/pnas.0805794105 https://www.pnas.org/doi/10.1073/pnas.0805794105 Peter Kelemen has written a lot of papers on this topic. Here is a more recent paper that I wrote together with Peter and others currently in review: https://eartharxiv.org/repository/view/9651/ https://eartharxiv.org/repository/view/9651/ This is more about the mechanics of how the rock breaks to allow fluids to move around. And here is another paper currently in review that we coauthored about how we know there’s gas moving in the system and therefore hydrogen is being produced: https://essopenarchive.org/users/543018/articles/1363688-enigmatic-harmonic-tremors-at-the-oman-drilling-project-multi-borehole-observatory-cultural-noise-or-subsurface-fluids https://essopenarchive.org/users/543018/articles/1363688-eni... Tbh I have no idea why we didn’t submit these to arXiv instead of these other preprint servers.
- Gravityloss 10mo ago
  Thank you for this, it's very illuminating and awesome news. I think it's worthy of its own submission as well (besides being very on topic on this subject here too).
  - mnky9800n 10mo ago
    I would be happy to have my papers on the front page of hacker news lol. So far it doesn’t happen.