I don't get this

[principled]

OK, here's the article as it appeared in the Daily Mail (Note the error with units which says kW but which should be TWh)
www.dailymail.co.uk/sciencetech/article-2375845/Greenhouse-gas-huge-untapped-source-energy-generating-400-times-power-Hoover-Dam.html

Here's the abstract in the original Science periodical
pubs.acs.org/doi/abs/10.1021/ez4000059

I still can't get my head round how at 24%/32% efficiency they are going to get more energy out than goes in. (At the moment there is net energy lost, but they imply that with improved membrane technology, there will be a net energy gain)
Any chemists out there who can explain how there can be a net energy gain? It sounds a little like cold fusion to my unqualified ear.
P

[marchesarosa]

Sounds like the tail wagging the dog, trying to find another "use" for CO2. It does not mention that separating out CO2 from thermal power generation is costly in the first place.

[jonjel]

Maybe the £14million government grant handout will enable them to answer your question P.

Better by far to be in a nice air conditioned office than a shed at the bottom of the garden.