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초록

As the demand for fossil fuels continues to increase worldwide, carbon dioxide (CO2) concentration in the air has increased over the centuries. The way to reduce CO2 emissions to the atmosphere, carbon capture and sequestration (CCS) technology have been developed that can be applied to power plants and factories, which are primary emission sources. According to the climate change mitigation policy, direct air capture (DAC) in air, referred to as “negative emission” technology, has a low CO2 concentration of 0.04%, so it is focused on adsorbent research, unlike conventional CCS technology. In the DAC field, chemical adsorbents using CO2 absorption, solid absorbents, amine-functionalized materials, and ion exchange resins have been studied. Since the absorbent-based technology requires a high-temperature heat treatment process according to the absorbent regeneration, the membrane-based CO2 capture system has a great potential Membrane-based system is also expected for indoor CO2 ventilation systems and immediate CO2 supply to smart farming systems. CO2 capture efficiency should be improved through efficient process design and material performance improvement.

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