Control of zeolite framework flexibility and pore topology for separation of ethane and ethylene.
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| Title: | Control of zeolite framework flexibility and pore topology for separation of ethane and ethylene. |
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| Authors: | Bereciartua, Pablo J., Cantín, Ángel, Corma, Avelino, Jordá, José L., Palomino, Miguel, Rey, Fernando, Valencia, Susana, Corcoran, Edward W. Jr., Kortunov, Pavel, Ravikovitch, Peter I., Burton, Allen, Chris Yoon, Yu Wang, Paur, Charanjit, Guzman, Javier, Bishop, Adeana R., Casty, Gary L. |
| Source: | Science (pre-March 2025). 11/24/2017, Vol. 358 Issue 6366, p1068-1071. 4p. 1 Diagram, 3 Graphs. |
| Subjects: | Chemical synthesis, Zeolites, Ethylene, RNA analysis, Metal-organic frameworks |
| Abstract: | The discovery of new materials for separating ethylene from ethane by adsorption, instead of using cryogenic distillation, is a key milestone for molecular separations because of the multiple and widely extended uses of these molecules in industry. This technique has the potential to provide tremendous energy savings when compared with the currently used cryogenic distillation process for ethylene produced through steam cracking. Here we describe the synthesis and structural determination of a flexible pure silica zeolite (ITQ-55). This material can kinetically separate ethylene from ethane with an unprecedented selectivity of ~100, owing to its distinctive pore topology with large heart-shaped cages and framework flexibility. Control of such properties extends the boundaries for applicability of zeolites to challenging separations. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | The discovery of new materials for separating ethylene from ethane by adsorption, instead of using cryogenic distillation, is a key milestone for molecular separations because of the multiple and widely extended uses of these molecules in industry. This technique has the potential to provide tremendous energy savings when compared with the currently used cryogenic distillation process for ethylene produced through steam cracking. Here we describe the synthesis and structural determination of a flexible pure silica zeolite (ITQ-55). This material can kinetically separate ethylene from ethane with an unprecedented selectivity of ~100, owing to its distinctive pore topology with large heart-shaped cages and framework flexibility. Control of such properties extends the boundaries for applicability of zeolites to challenging separations. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.aao0092 |
