That is the purpose, not to sequester the CO2 but to concentrate the CO2 from the few hundred parts per million in the atmosphere up to near 100% for sequestering elsewhere
in a cyclic process.
If you are going to capture CO2 for something, you might as well capture energy at the same time.

There's some research I just got the goods on (direct carbon fuel cells) which is pretty much ideally suited for a cycle which does just that.  I hope to be blogging that as soon as I get enough think-time to organize it.