How does air-capture compare physically to stationary capture, for example in flue stacks at power plants?
Stationary carbon capture, which often employs the so-called “post-combustion” method, separates CO2 from hot flue gases before they are emitted from the flue stack. Air-capture separates CO2 from ambient air. Both stationary capture and air-capture use sorbents to capture CO2 from an air stream. Both processes have steps to then separate out, clean and pressurize the CO2 product.