Membrane gas separation processes for CO2 capture from cement kiln flue gas

Abstract

The cement industry is a significant source of CO2 emissions for the non-power sector. Carbon capture and storage has been proposed as a strategy to mitigate these CO2 emissions. The high CO2 partial pressure of the cement kiln flue gas enables more options than in other post-combustion capture scenarios. Here, three distinct process designs for membrane gas separation are simulated for the capture of CO2 from cement kiln flue gas. The first design is based on a standard natural gas processing flowsheet and includes two membrane stages with a permeate recycle from the first stage. The second design uses a single membrane stage with downstream compression and cooling to achieve the necessary ..