Tell men about the Allam power cycle and NetPower

[Parliament 14245]

It's some kinda zero-emission way to generate electricity from natural gas, and there's a demo plant running in LaPort.  I've never heard of this before.  Is it legit?

https://www.netpower.com/

 

[TwiceHorn 31440]

Interdasting.  The usual, or a typical power generation cycle burns either natural gas or gasified coal.  The combustion product is first expanded through a gas turbine (Brayton cycle, think jet engine), then the hot exhaust gas used to boil/heat water that is then expanded through a steam turbine (Rankine cycle).  So you have two shafts turning two generators.  It uses lots of water for the steam and produces a gas waste product from burning natural gas or gasified coal that is full of CO2 and NOx.

This cycle seems to use oxygen, rather than air, to combust natural gas or gasified coal.  That produces no NOx, because the N usually comes from air.  The CO2 that it produces, plus other CO2, apparently is superheated (meaning at pressure to above its atmospheric boiling point) and is expanded through a turbine and recovered.  Apparently, superheated CO2 expands nicely, like steam, so there's no need for a steam turbine/generator set.  I can't readily find a diagram of it.

The big drawback seems to be generating and using oxygen, but it uses very little.

[Parliament 14245]

There's still CO2 that comes out of it. I assume there isn't much volume thought.