Small-pore zeolite and zeotype membranes for CO2 capture and sequestration – A review

The increasing anthropological CO2 emission prompts an urgent solution for better carbon extraction technologies from CO2 point sources. Likewise, natural gas processes require similar CO2 capture technologies for natural gas refining and biogas upgrading. Recently, the number of studies in CO2 removal processes using zeolite and zeotype membranes has been increasing. Zeolite frameworks having micropores composed of 8 T-atoms are of particular interest since they have similar pore sizes to the kinetic diameter of light gases. Exploration of the newer small-pore zeolite framework such as CHA, DDR, AEI, LTA, and ERI give many options for the preparation of high-performance zeolite/zeotype membrane for CO2 removal and or CO2 capture. Herein, up-to-date small-pore zeolite/zeotype membranes are reviewed, and the prospects of these membranes are also discussed.