Unraveling the Diffusion Properties of Zeolite-Based Multicomponent Catalyst by Combined Gravimetric Analysis and IR Spectroscopy (AGIR)
| Autor: | Alexandre Vimont, Philippe Bazin, Zifeng Yan, Svetlana Mintova, Arnaud Travert, Peng Peng, Xinmei Liu, Dusan Stosic, Abdelhafid Aitblal |
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| Přispěvatelé: | China University of Petroleum, 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
internal diffusion 010405 organic chemistry Diffusion Infrared spectroscopy General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis [CHIM.MATE]Chemical Sciences/Material chemistry 010402 general chemistry Fluid catalytic cracking 01 natural sciences Gravimetric Analysis and IR spectroscopy (AGIR) Catalysis 0104 chemical sciences operando analysis model zeolite-based catalyst Chemical engineering hierarchical zeolite Gravimetric analysis catalyst effectiveness factor Zeolite Internal diffusion |
| Zdroj: | ACS Catalysis ACS Catalysis, American Chemical Society, 2020, 10 (12), pp.6822-6830. ⟨10.1021/acscatal.0c01021⟩ |
| ISSN: | 2155-5435 |
| DOI: | 10.1021/acscatal.0c01021⟩ |
| Popis: | International audience; The concept of pore hierarchization for enhancing zeolite catalytic performance has been the main focus during the past decade; the main research activities have widely emphasized the preparation of single-component hierarchical zeolite catalysts. Here we report on the critical aspect of interconnectivity of multicomponents in hierarchical zeolite catalysts using a combined gravimetric and infrared spectroscopy (AGIR) analysis. The variances of macroscopic diffusion behaviors between the global multicomponent catalyst (indexed as global diffusion time constant) and its zeolitic moiety (indexed as micropore diffusion time constant) are differentiated via simultaneous gravimetric and infrared analysis, respectively. The effectiveness factors correlated with the diffusion time constants show that the nonideal interconnectivity between the zeolitic and nonzeolitic components weakens the full potential of the multicomponent catalyst. |
| Databáze: | OpenAIRE |
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