Absolute CO<sub>2</sub>/Xenon Separation in Ultramicropore MOF for Anesthetic Gases Regeneration
Jiahui Zeng, Yu Fu, Yue Wu, Shanshan Wang, Wenxiang Zhang, Heping Ma
Abstract
Abstract Xe is an ideal anesthetic gas, but it has not been widely used in practice due to its high cost and low output. Closed‐circuit Xe recovery and recycling is an economically viable method to ensure adequate supply in medical use. Herein, we design an innovative way to recover Xe by using a stable fluorinated metal‐organic framework (MOF) NbOFFIVE‐1‐Ni to eliminate CO 2 from moist exhaled anesthetic gases. Unlike other Xe recovery MOFs with low Xe/CO 2 selectivity (less than 10), NbOFFIVE‐1‐Ni could achieve absolute molecular sieve separation of CO 2 /Xe with excellent CO 2 selectivity (825). Mixed‐gas breakthrough experiments assert the potential of NbOFFIVE‐1‐Ni as a molecular sieve adsorbent for the effective and energy‐efficient removal of carbon dioxide with 99.16 % Xe recovery. Absolute CO 2 /Xe separation in NbOFFIVE‐1‐Ni makes closed‐circuit Xe recovery and recycling can be easily realized, demonstrating the potential of NbOFFIVE‐1‐Ni for important anesthetic gas regeneration under ambient conditions.