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Tin Active Sites Confined in Zeolite Framework as a Promising Shape‐Selective Catalyst for Ethylene Oxide Hydration
- Source :
- Chemistry – A European Journal. 29
- Publication Year :
- 2023
- Publisher :
- Wiley, 2023.
-
Abstract
- Shape-selective stannosilicates have been post-synthesized for the hydration of epoxide to diols. A simple acid treatment has been employed to remove extensively the interlayer double four ring units, converting the three-dimensional (3D) UTL germanosilicate into a 2D layered IPC-1P intermediate. Isomorphous incorporation of tetrahedrally coordinated Sn active centers was realized via solid-liquid treatment of IPC-1P with diammonium hexachlorostannate aqueous solution, which was accompanied by the spontaneous condensation of neighboring silica-rich cfi layers upon calcination and structural construction of a 3D PCR structure. Sn-PCR stannosilicates with tunable Sn contents were thus prepared. With Sn-derived robust Lewis acidity confined in the intersecting 10- and 8-ring channels, the Sn-PCR (Si/Sn molar ratio of 77) catalyst served as a shape-selective nanoreactor for the hydration of ethylene oxide (EO) into ethylene glycol (EG), exhibiting a remarkable EO conversion (99.5%) as well as a steady EG selectivity (98.4%) at greatly reduced H2O/EO molar ratio and near-ambient reaction temperature.
- Subjects :
- Organic Chemistry
General Chemistry
Catalysis
Subjects
Details
- ISSN :
- 15213765 and 09476539
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Chemistry – A European Journal
- Accession number :
- edsair.doi.dedup.....ef88ce9ae824b1fd50a136ed3ed232bf