Feng, Xuhui ; Zong, Zhaowang ; Elsaidi, Sameh K. ; Jasinski, Jacek B. ; Krishna, Rajamani ; Thallapally, Praveen K. ; Carreon, Moises A. (2016) Kr/Xe separation over a chabazite zeolite membrane Journal of the American Chemical Society, 138 (31). pp. 9791-9794. ISSN 0002-7863
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jacs.6b06515
Related URL: http://dx.doi.org/10.1021/jacs.6b06515
Abstract
Herein we demonstrate that chabazite zeolite SAPO-34 membranes effectively separated Kr/Xe gas mixtures at industrially relevant compositions. Control over membrane thickness and average crystal size led to industrial range permeances and high separation selectivities. Specifically, SAPO-34 membranes can separate Kr/Xe mixtures with Kr permeances as high as 1.2 × 10-7 mol/m2 s Pa and separation selectivities of 35 for molar compositions close to typical concentrations of these two gases in air. In addition, SAPO-34 membranes separated Kr/Xe mixtures with Kr permeances as high as 1.2 × 10-7 mol/m2 s Pa and separation selectivities up to 45 for molar compositions as might be encountered in nuclear reprocessing technologies. Molecular sieving and differences in diffusivities were identified as the dominant separation mechanisms.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 111907 |
| Deposited On: | 26 Sep 2017 12:55 |
| Last Modified: | 26 Sep 2017 12:55 |
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