This solves only part of the problem: it captures CO2 and can release it later. But you still need to figure out what to do with this CO2, how to turn it into something useful.
Electro Carbon https://www.electrocarbon.ca/en
https://sustainablebiz.ca/clear-the-runway-electro-carbon-be...
Their process for generating potassium formate is greener than standard methods. It does require electricity as an input but that can come from renewable, green sources.
Potassium formate is used in de-icing products, fertilizer, heat transfer fluids, drilling fluid, etc... so a useful, monetizeable output comes out of the process.
Disclosure - Know the founders personally. Wanted to shoutout their work. No financial ties to the company.Chemistry is not at all my expertise & I don't have details on their process beyond what's on the website.
For example:
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/
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-eni...
Tbh I have no idea why we didn’t submit these to arXiv instead of these other preprint servers.
I think it's worthy of its own submission as well (besides being very on topic on this subject here too).
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.
IDK, build houses out of limestone like we have been doing for ages.
/s
One of the subplots from the excellent Delta-V series by Daniel Suarez.