Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass
The diffusion properties of low-density non-porous silica glasses (expanded silica glasses) were researched with the aim of searching for the molecular structure of membrane materials intended for the effective separation of helium–neon gas mixtures. It has been shown on a large number (84) of compu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/9/754 |
| _version_ | 1797578913134673920 |
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| author | Sergey V. Kukhtetskiy Elena V. Fomenko Alexander G. Anshits |
| author_facet | Sergey V. Kukhtetskiy Elena V. Fomenko Alexander G. Anshits |
| author_sort | Sergey V. Kukhtetskiy |
| collection | DOAJ |
| description | The diffusion properties of low-density non-porous silica glasses (expanded silica glasses) were researched with the aim of searching for the molecular structure of membrane materials intended for the effective separation of helium–neon gas mixtures. It has been shown on a large number (84) of computer models of such glasses that there are molecular structures of silica in which various helium and neon diffusion mechanisms are simultaneously implemented: superdiffusion for helium and subdiffusion for neon. This makes it possible to significantly (by 3–5 orders of magnitude) increase the helium permeability of such glasses at room temperature and maintain a high selectivity for the separation of helium and neon (at the level of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>4</mn></msup></semantics></math></inline-formula>–<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>5</mn></msup></semantics></math></inline-formula>) at the same time. |
| first_indexed | 2024-03-10T22:29:27Z |
| format | Article |
| id | doaj.art-d91cca9bd0c343c282d46fdad20e85d3 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T22:29:27Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-d91cca9bd0c343c282d46fdad20e85d32023-11-19T11:54:00ZengMDPI AGMembranes2077-03752023-08-0113975410.3390/membranes13090754Anomalous Diffusion of Helium and Neon in Low-Density Silica GlassSergey V. Kukhtetskiy0Elena V. Fomenko1Alexander G. Anshits2Federal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Chemistry and Chemical Technology SB RAS, Akademgorodok 50/24, Krasnoyarsk 660036, RussiaFederal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Chemistry and Chemical Technology SB RAS, Akademgorodok 50/24, Krasnoyarsk 660036, RussiaFederal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Chemistry and Chemical Technology SB RAS, Akademgorodok 50/24, Krasnoyarsk 660036, RussiaThe diffusion properties of low-density non-porous silica glasses (expanded silica glasses) were researched with the aim of searching for the molecular structure of membrane materials intended for the effective separation of helium–neon gas mixtures. It has been shown on a large number (84) of computer models of such glasses that there are molecular structures of silica in which various helium and neon diffusion mechanisms are simultaneously implemented: superdiffusion for helium and subdiffusion for neon. This makes it possible to significantly (by 3–5 orders of magnitude) increase the helium permeability of such glasses at room temperature and maintain a high selectivity for the separation of helium and neon (at the level of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>4</mn></msup></semantics></math></inline-formula>–<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>5</mn></msup></semantics></math></inline-formula>) at the same time.https://www.mdpi.com/2077-0375/13/9/754low-density silica glassexpanded silica glassheliumneonpermeabilityselectivity |
| spellingShingle | Sergey V. Kukhtetskiy Elena V. Fomenko Alexander G. Anshits Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass Membranes low-density silica glass expanded silica glass helium neon permeability selectivity |
| title | Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass |
| title_full | Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass |
| title_fullStr | Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass |
| title_full_unstemmed | Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass |
| title_short | Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass |
| title_sort | anomalous diffusion of helium and neon in low density silica glass |
| topic | low-density silica glass expanded silica glass helium neon permeability selectivity |
| url | https://www.mdpi.com/2077-0375/13/9/754 |
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