Adsorption of 85Kr radioactive inert gas into hardening mixtures

Butkus, Donatas; Kleiza, Jonas

doi:10.1007/s10967-010-0691-5

“…[3] The 85 Kr intensifies the ionization of atmospheric gases and results in irreversible climate changes. [4] Therefore,the capture and storage of 85 Kr from off-gases came into the focus.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason the emitted 85 Kr has accumulated in the atmosphere, causing a fifteen‐fold increase in radioactivity concentration from 0.1 Bq m −3 in 1959 to current 1.45 Bq m −3 in Central Europe [3] . The 85 Kr intensifies the ionization of atmospheric gases and results in irreversible climate changes [4] . Therefore, the capture and storage of 85 Kr from off‐gases came into the focus.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

¹

,

Zhou

²

,

Zhang

³

et al. 2021

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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,itischallenging to separate krypton (Kr) from xenon (Xe) because of the chemical inertness and similar physical properties.H erein we prepared high-silica CHA zeolite membranes with ultra-high selectivity and irradiation stability for Kr/Xe separation. The suitable aperture sizea nd rigid framework endures the membrane as trong size-exclusion effect. The ultrahigh selectivity of 51-152 together with the Kr permeance of 0.7-1.3 10 À8 mol m À2 s À1 Pa À1 of high-silica CHA zeolite membranes far surpass the state-of-the-art polymeric membranes.T he membrane is among the most stable polycrystalline membranes for separation of humid Kr/ Xe mixtures.T ogether with the excellent irradiation stability, high-silica CHA zeolite membranes pave the way to separate radioactive Kr from Xe for anotable reduction of the volatile nuclear waste storage volume.

show abstract

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

Wang

¹

,

Zhou

²

,

Zhang

³

et al. 2021

View full text Add to dashboard Cite

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,itischallenging to separate krypton (Kr) from xenon (Xe) because of the chemical inertness and similar physical properties.H erein we prepared high-silica CHA zeolite membranes with ultra-high selectivity and irradiation stability for Kr/Xe separation. The suitable aperture sizea nd rigid framework endures the membrane as trong size-exclusion effect. The ultrahigh selectivity of 51-152 together with the Kr permeance of 0.7-1.3 10 À8 mol m À2 s À1 Pa À1 of high-silica CHA zeolite membranes far surpass the state-of-the-art polymeric membranes.T he membrane is among the most stable polycrystalline membranes for separation of humid Kr/ Xe mixtures.T ogether with the excellent irradiation stability, high-silica CHA zeolite membranes pave the way to separate radioactive Kr from Xe for anotable reduction of the volatile nuclear waste storage volume.

show abstract