Carbon dioxide (CO₂) capture is becoming important both in environmental protection and in many areas related to energy security. it is essential to capture and separate traces and concentrated CO₂ to decrease the concentration of CO₂ in the atmosphere and to improve the quality of important commodities such as CH₄, H₂, and N₂. However, the technology involves a non-voluntary reaction that concentrates low-concentration CO₂ to high concentration, which poses significant challenges such as low technological maturity and high costs. To address these issues, improving the performance of low-concentration CO₂ capture technology is crucial, and for this purpose, the development of sorbents is essential.

In this study, various materials were utilized to capture trace amounts of CO₂ by considering parameters necessary for capturing trace amounts of CO₂, such as excellent CO₂ capture capacity at low pressure, high selectivity, and low heat of reaction, and a new material suitable for capturing trace amounts of CO2 was developed. The developed material was evaluated through various characterization techniques such as BET, XRD, and IR. The developed sorbent was evaluated for its CO2 sorption performance in a low-concentration CO2 atmosphere and its durability during long-term operation. In addition, its hydrothermal stability was confirmed by exposing it to real atmospheric conditions. Based on these results, the potential of the developed material as a sorbent for trace CO2 capture was confirmed, and it can be applied to processes under low-concentration CO2 conditions such as DAC, LNG power plants, and H2 PSA. In addition, it is expected to be utilized in various CO2 capture processes such as air purifiers and power plants.

Keywords: Carbon Dioxide capture, Traces CO2 removal, Selectivity, Heat of reaction, Characteristics

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