Global carbon dioxide emissions from fossil fuels and industry were 37.12 billion metric tons (GtCO₂) in 2021
So we'd only need about 38,000 of these plants to remove the carbon we release into the atmosphere every year.
Then there's also the over 2 trillion tons of CO2 we've already released that's currently overheating the planet.
They’re displacing liquid oil with an equal volume of compressed CO2 gas, so I’m guessing they are emitting way more carbon than they are capturing.
Their solution doesn't solve the problem, but it's a step on the path towards a solution.
https://news.ycombinator.com/item?id=37155241
The primary assumption is that solar energy is going to be almost free within a decade because we will massively overprovision it to balance yearly variation.
Then you need to find a cheap industrial process which uses electricty to do something which has a positive climate impact.