Radiation-Resistant Kr-Selective MOF With Record Kr/Xe Selectivity at Elevated Pressure.

Qihang Tian, Yinhui Li, Qingkuan Meng, Shizhen Liu, Yongzheng Wang, Bin Chen, Heping Ma

Abstract read

In one paragraph

Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

7 authors.

Qihang TianState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Yinhui LiState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Qingkuan MengState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Shizhen LiuState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Yongzheng WangState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Bin ChenState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Heping MaState Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.ORCID https://orcid.org/0000-0002-7551-2639

Funding

Fundamental Research Funds for the Central Universities xzy012023171National Natural Science Foundation of China 22178280Natural Science Basic Research Plan in Shaanxi Province of China 2024JC-JCQN-20Natural Science Basic Research Plan in Shaanxi Province of China 2024JC-YBMS-097

6 · The paper itself

Abstract

The separation of Kr/Xe from spent nuclear fuel off-gas is critical, yet most current adsorbents exhibit Xe-Kr co-adsorption under elevated pressures, posing challenges for industrial pressure swing adsorption processes. Herein, we present and evaluate a metal-organic framework, CALF-20M-w, engineered for molecular sieving separation of Kr/Xe under industrial pressure conditions. CALF-20M-w possesses a pore size of 3.7 Å, which position between Kr (3.6 Å) and Xe (4.1 Å) kinetic diameters, enables record Kr/Xe uptake ratio (52.2) and selectivity of 4424 at 195 K and 5 bar, surpassing all benchmark materials. GCMC simulations reveal that Kr atoms occupy favorable positions within CALF-20M-w's intersecting channels, while Xe atoms are sterically excluded in the pressure range of 1-30 bar. Dynamic breakthrough separation experiments and PSA simulation show CALF-20M-w can yield >99.9% pure Xe, demonstrating feasibility for radioactive Kr removal from spent nuclear fuel off-gases. Moreover, CALF-20M-w exhibits extreme radiation resistance under β-irradiation (72 kGy/h) and γ-irradiation (240 kGy), outperforming UiO-66 and ZIF-8. CALF-20M-w sets new benchmarks for high-pressure molecular sieving in Kr/Xe separation, offering a highly promising strategy for nuclear waste management and rare gas purification.

Indexed as

gas adsorption and separationmetal organic frameworkporous materialsradiation stabilityxenon and krypton

Identifiers

PMID42080403

DOI10.1002/advs.202600073

PMCPMC13335603

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.