Atomic-Insight into Zeolite Catalyst Forming—an Advanced NMR Study
| Autor: | Cassandre Kouvatas, Suheil F. Abdo, Valentin Valtchev, Robert L. Bedard, Louwanda Lakiss, Svetlana Mintova, Jean-Pierre Gilson, Christian Fernandez, Jeffery C. Bricker |
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| Přispěvatelé: | Laboratoire catalyse et spectrochimie (LCS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Normandie Université (NU) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
010405 organic chemistry [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.CATA]Chemical Sciences/Catalysis 010402 general chemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry General Energy Chemical engineering Physical and Theoretical Chemistry Zeolite |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2021, 125 (36), pp.20028-20034. ⟨10.1021/acs.jpcc.1c05501⟩ |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.1c05501 |
| Popis: | International audience; The main goal of this study is to understand, at the atomic level, the chemical interactions occurring between an active phase, a FAU zeolite in this case, and its binder during catalyst forming. This unit operation is a critical step in catalyst scale-up and commercialization but hasn't received the attention it deserves from academia. Herein, we present atomic-level insight in the solid-state chemistry taking place during the extrusion process by advanced NMR spectroscopy techniques (Indirect 27 Al{ 1 H}DNP MAS and 27 Al-{ 29 Si} J-HMQC). In particular, we: i) elucidate the chemical reactions taking place between atype Y FAU zeolite (Si/Al = 2.3) and abinder (pseudoboehmite), producing new active sites different than those present in either the zeolite or binder, ii) determine the location of these new active sites by a combination of DNP build-up time (TDNP)extracted from { 1 H}-27 Al saturation-recovery CP experiments and 2D heteronuclear 29 Si-27 Al NMR. This illustrates the power of advanced NMR techniques to elucidate the nature and location of newly created active sites during catalyst forming and provides insight into a key step to further fine-tune industrial catalysts. |
| Databáze: | OpenAIRE |
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