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Titel: Preparation of highly active phosphated TiO2 catalysts via continuous sol–gel synthesis in a microreactor
Autor/-in: Martin, Oliver
Bolzli, Nicole
Puértolas, Begoña
Pérez-Ramírez, Javier
Riedlberger, Peter
et. al: No
Erschienen in: Catalysis Science & Technology
Band(Heft): 9
Heft: 17
Seiten: 4744
Seiten bis: 4758
Verlag / Hrsg. Institution: Royal Society of Chemistry
Erscheinungsdatum: 13-Aug-2019
Lizenz (gemäss Verlagsvertrag): CC BY-NC 3.0: Namensnennung - Nicht kommerziell 3.0 Unported
Art der Begutachtung: Peer review (Publikation)
Sprache: Englisch
Schlagwörter: Heterogeneous catalyst; Microreaction technology; Continuous manufacturing; Process intensification; Yield optimization; Selective synthesis
Fachgebiet (DDC): 540: Chemie
Zusammenfassung: Microreactors, featuring μm-sized tubes, offer greater flexibility and precise control of chemical processes compared to conventional large-scale reactors, due to their elevated surface-to-volume ratio and modular construction. However, their application in catalyst production has been largely neglected. Herein, we present the development of a microreactor process for the one-step sol–gel preparation of phosphated TiO2 – a catalyst which has been recently demonstrated to be an eco-friendly material for the selective synthesis of the platform chemical 5-hydroxymethylfurfural (5-HMF) from bio-derived glucose. In order to establish catalyst preparation–property–performance relationships, 18 samples were prepared according to a D-optimal experimental plan with a central point. The key properties of these samples (porosity, crystallite size, mole bulk fraction of P) were correlated, using quadratic and interaction models, with the catalytic performance (conversion, selectivity, reaction rate) of 5-HMF synthesis as a test reaction. The optimal calculated catalyst features were set as target parameters to optimise catalyst synthesis applying quadratic correlation functions. An optimal catalyst was obtained, validating the models employed, with a yield of almost 100% and a space–time yield of ca. 3 orders of magnitude higher than that of a conventional batch process. The high yield could be mainly attributed to the optimal hydrolysis ratio and temperature. Controlling the TiO2 crystallite size and surface acidity in conjunction with fine-tuning of the porous properties in the microreactor led to increased glucose conversion, surface based formation rates of 5-HMF, and selectivity towards 5-HMF of the optimal catalyst in relation to the batch-prepared material.
Departement: Life Sciences und Facility Management
Organisationseinheit: Institut für Chemie und Biotechnologie (ICBT)
Publikationstyp: Beitrag in wissenschaftlicher Zeitschrift
DOI: 10.1039/C8CY02574F
10.21256/zhaw-18049
ISSN: 2044-4753
2044-4761
URI: https://digitalcollection.zhaw.ch/handle/11475/18049
Publiziert im Rahmen des ZHAW-Projekts: Kontinuierliche Mikroreaktoren für die Synthese von neuen heterogenen Katalysatoren und zur katalytischen Biomasseverwertung
Enthalten in den Sammlungen:Publikationen Life Sciences und Facility Management

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