ユビキタスCO₂ 回収に向けた膜によるDAC

抄録

CO2 capture technology is important as a solution to global warming and climate change. This technology is needed not only for CO2 emission reduction, but also for more aggressive capture, i.e., direct capture of CO2 from the atmosphere. In recent years, several approaches have been reported for anthropogenic direct CO2 capture technology referred to as Direct Air Capture (DAC). Although membrane separation is a low–cost and space–saving CO2 capture technology, the conventional separation membranes do not have sufficient CO2 permeability, and membrane separation for DAC has been considered impossible. Considering the ubiquitous nature of atmospheric air, membrane separation is advantageous compared to other CO2 capture technologies because of its simplicity, small footprint, no installation restrictions, and environmental friendliness. This review summarizes current DAC technologies and the challenges of using CO2 separation membranes for DAC and recent related research and discusses the future potential of membrane DAC.