High-Silica CHA Zeolite Membrane with Ultra-High Selectivity and Irradiation Stability for Krypton/Xenon Separation.

ABSTRACT: Capture and storage of the long-lived ⁸⁵ Kr is an efficient approach to mitigate the emission of volatile radionuclides from the spent nuclear fuel reprocessing facilities. However, it is challenging to separate krypton (Kr) from xenon (Xe) because of the chemical inertness and similar physical properties. Herein we prepared high-silica CHA zeolite membranes with ultra-high selectivity and irradiation stability for Kr/Xe separation. The suitable aperture size and rigid framework endures the membrane a strong size-exclusion effect. The ultrahigh selectivity of 51-152 together with the Kr permeance of 0.7-1.3×10^-8  mol m^-2  s^-1  Pa^-1 of high-silica CHA zeolite membranes far surpass the state-of-the-art polymeric membranes. The membrane i

SUBMITTER: Wang X 

PROVIDER: S-EPMC8048931 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature