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Title: Krypton-xenon separation properties of SAPO-34 zeolite materials and membranes

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.15434· OSTI ID:1356958
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical & Biomolecular Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

Separation of the radioisotope 85 Kr from 136 Xe is an important target during used nuclear fuel recycling. We report a detailed study on the Kr and Xe adsorption, diffusion, and membrane permeation properties of the silicoaluminophosphate zeolite SAPO‐34. Adsorption and diffusion measurements on SAPO‐34 crystals indicate their potential for use in Kr‐Xe separation membranes, but also highlight competing effects of adsorption and diffusion selectivity. SAPO‐34 membranes are synthesized on α−alumina disk and tubular substrates via steam assisted conversion seeding and hydrothermal growth, and are characterized in detail. Membrane transport measurements reveal that SAPO‐34 membranes can separate Kr from Xe by molecular sieving, with Kr permeabilities around 50 Barrer and mixture selectivity of 25–30 for Kr at ambient or slight sub‐ambient conditions. The membrane transport characteristics are modeled by the Maxwell‐Stefan equations, whose predictions are in very good agreement with experiment and confirm the minimal competing effects of adsorption and diffusion. © 2016 American Institute of Chemical Engineers AIChE J , 63: 761–769, 2017

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-00OR22725; NE0008298
OSTI ID:
1356958
Alternate ID(s):
OSTI ID: 1400772
Journal Information:
AIChE Journal, Vol. 63, Issue 2; ISSN 0001-1541
Publisher:
American Institute of Chemical EngineersCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (4)

Xenon Recovery by DD3R Zeolite Membranes: Application in Anaesthetics journal October 2019
Noble gas separation by a MOF with one-dimensional channels journal January 2019
Xenon Recovery by DD3R Zeolite Membranes: Application in Anaesthetics journal September 2019
Thermodynamic Insights into the Characteristics of Unary and Mixture Permeances in Microporous Membranes journal May 2019