Deuterium is a crucial clean energy source required for nuclear fusion and is a future resource needed in various industries and scientific fields. However, it is not easy to enrich deuterium because the proportion of deuterium in the hydrogen mixture is scarce, at approximately 0.016%. Furthermore, the physical and chemical properties of the hydrogen mixture and deuterium are very similar. Therefore, the efficient separation of deuterium from hydrogen mixtures is often a significant challenge when using modern separation technologies. Recently, to effectively separate deuterium, studies utilizing the ‘Kinetic Quantum Sieving Effect (KQS)’ of porous materials are increasing. Therefore, in this review, two different strategies have been discussed for improving KQS efficiency for hydrogen isotope separation performance using nanoporous materials. One is the gating effect, which precisely controls the aperture locally by adjusting the temperature and pressure. The second is the breathing phenomenon, utilizing the volume change of the structure from closed system to open system. It has been reported that efficient hydrogen isotope separation is possible using these two methods, and each of these effects is described in detail in this review. In addition, a specific-isotope responsive system (e.g., 2nd breathing effect in MIL-53) has recently been discovered and is described here as well.

Abstract
1.서 론
2. 운동 양자 체 효과에 따른 동위원소 분리기술
    2.1 ‘Gating effect’를 활용한 KQS
    2.2 ‘Breathing effect’를 활용한 KQS
3. 선택적 동위원소 흡착 반응에 기반한 동위원소 분리 기술
4.결 론
References

• 이슬지(경상국립대학교 에너지공학과/미래융복합기술연구소) | Seulji Lee (Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University)
• 오현철(경상국립대학교 에너지공학과/미래융복합기술연구소) | Hyunchul Oh (Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University) Corresponding author