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Title: SAPO-34 membranes for xenon capture from air

Journal Article · · Journal of Membrane Science
 [1];  [1];  [1];  [2];  [2];  [1]
  1. Colorado School of Mines, Golden, CO (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Capturing Xe from gas mixtures represents one of the most challenging molecular gas separations. In this work, we demonstrate the ability of a zeolite membrane, denoted as SAPO-34, to effectively capture Xe from air. Specifically, SAPO-34 membranes showed air permeances as high as 2.3 Ă— 10-7 mol/m2 s Pa (690 GPU) and separation selectivities as high as 30.1 for a molar feed of 9:1 air/Xe. Molecular sieving, competitive adsorption, and diffusivity differences played a critical role in the overall separation performance. Membranes were air selective because of favorable molecular sieving and differences in diffusivity between gases present in the air mixture and Xe. Molecular sieving and diffusivity differences were identified as the dominant separation mechanisms. The high air permeances and separation selectivities make these membranes highly appealing as a potentially less energy intensive alternative to cryogenic distillation, the benchmark technology used to separate these gases.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1505297
Journal Information:
Journal of Membrane Science, Journal Name: Journal of Membrane Science Journal Issue: C Vol. 573; ISSN 0376-7388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Xenon Recovery by DD3R Zeolite Membranes: Application in Anaesthetics journal September 2019
Xenon Recovery by DD3R Zeolite Membranes: Application in Anaesthetics journal October 2019