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

Abstract

Separation of the radioisotope 85Kr from 136Xe is an important target during used nuclear fuel recycling. In this paper, 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. Finally, 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.

Authors:
 [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
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1356958
Alternate Identifier(s):
OSTI ID: 1400772
Grant/Contract Number:
AC05-00OR22725; NE0008298; NE 0008298
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
AIChE Journal
Additional Journal Information:
Journal Volume: 63; Journal Issue: 2; Journal ID: ISSN 0001-1541
Publisher:
American Institute of Chemical Engineers
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; zeolite membranes; gas separation

Citation Formats

Hye Kwon, Yeon, Kiang, Christine, Benjamin, Emily, Crawford, Phillip, Nair, Sankar, and Bhave, Ramesh. Krypton-xenon separation properties of SAPO-34 zeolite materials and membranes. United States: N. p., 2016. Web. doi:10.1002/aic.15434.
Hye Kwon, Yeon, Kiang, Christine, Benjamin, Emily, Crawford, Phillip, Nair, Sankar, & Bhave, Ramesh. Krypton-xenon separation properties of SAPO-34 zeolite materials and membranes. United States. doi:10.1002/aic.15434.
Hye Kwon, Yeon, Kiang, Christine, Benjamin, Emily, Crawford, Phillip, Nair, Sankar, and Bhave, Ramesh. Wed . "Krypton-xenon separation properties of SAPO-34 zeolite materials and membranes". United States. doi:10.1002/aic.15434. https://www.osti.gov/servlets/purl/1356958.
@article{osti_1356958,
title = {Krypton-xenon separation properties of SAPO-34 zeolite materials and membranes},
author = {Hye Kwon, Yeon and Kiang, Christine and Benjamin, Emily and Crawford, Phillip and Nair, Sankar and Bhave, Ramesh},
abstractNote = {Separation of the radioisotope 85Kr from 136Xe is an important target during used nuclear fuel recycling. In this paper, 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. Finally, 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.},
doi = {10.1002/aic.15434},
journal = {AIChE Journal},
number = 2,
volume = 63,
place = {United States},
year = {Wed Jul 27 00:00:00 EDT 2016},
month = {Wed Jul 27 00:00:00 EDT 2016}
}

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