Kr/Xe Separation over a Chabazite Zeolite Membrane
| Autor: | Jacek B. Jasinski, Moises A. Carreon, Rajamani Krishna, Zhaowang Zong, Xuhui Feng, Praveen K. Thallapally, Sameh K. Elsaidi |
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| Rok vydání: | 2016 |
| Předmět: |
Chabazite
Chemistry Analytical chemistry Membrane thickness 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Crystal Nuclear reprocessing Colloid and Surface Chemistry Membrane Organic chemistry 0210 nano-technology Zeolite |
| Zdroj: | Journal of the American Chemical Society. 138(31) |
| ISSN: | 1520-5126 |
| Popis: | 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/m(2) 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/m(2) 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. |
| Databáze: | OpenAIRE |
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