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http://hdl.handle.net/10773/35717
Title: | Post-Synthesis Strategies to Prepare Mesostructured and Hierarchical Silicates for Liquid Phase Catalytic Epoxidation |
Author: | Gomes, Diana M. Neves, Patrícia Antunes, Margarida M. Fernandes, António J. S. Pillinger, Martyn Valente, Anabela A. |
Keywords: | Catalytic epoxidation Olefins Porous materials Hierarchical zeolite Ordered mesoporous silica Molybdenum |
Issue Date: | Dec-2022 |
Publisher: | MDPI |
Abstract: | Olefin epoxidation is an important transformation for the chemical valorization of olefins, which may derive from renewable sources or domestic/industrial waste. Different post-synthesis strategies were employed to introduce molybdenum species into mesostructured and hierarchical micro-mesoporous catalysts of the type TUD-1 and BEA, respectively, to confer epoxidation activity for the conversion of relatively bulky olefins (e.g., biobased methyl oleate, DL-limonene) to epoxide products, using tert-butyl hydroperoxide as an oxidant. The influences of (i) the type of metal precursor, (ii) type of post-synthesis impregnation method, (iii) type of support and (iv) top-down versus bottom-up synthesis methodologies were studied to achieve superior catalytic performances. Higher epoxidation activity was achieved for a material prepared via (post-synthesis) incipient wetness impregnation of MoO2(acac)2 (acac = acetylacetonate) on (pre-treated) siliceous TUD-1 and calcination; for example, methyl oleate was converted to the corresponding epoxide with 100% selectivity at 89% conversion (70 °C). Catalytic and solid-state characterization studies were conducted to shed light on material stability phenomena. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/35717 |
DOI: | 10.3390/catal12121513 |
ISSN: | 2073-4344 |
Appears in Collections: | CICECO - Artigos DFis - Artigos DQ - Artigos I3N-FSCOSD - Artigos |
Files in This Item:
File | Description | Size | Format | |
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catalysts-12-01513.pdf | 7.84 MB | Adobe PDF | View/Open |
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