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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Preparation of highly active phosphated TiO2 catalysts via continuous sol–gel synthesis in a microreactor
Authors: Martin, Oliver
Bolzli, Nicole
Puértolas, Begoña
Pérez-Ramírez, Javier
Riedlberger, Peter
et. al: No
DOI: 10.1039/C8CY02574F
Published in: Catalysis Science & Technology
Volume(Issue): 9
Issue: 17
Page(s): 4744
Pages to: 4758
Issue Date: 13-Aug-2019
Publisher / Ed. Institution: Royal Society of Chemistry
ISSN: 2044-4753
Language: English
Subjects: Heterogeneous catalyst; Microreaction technology; Continuous manufacturing; Process intensification; Yield optimization; Selective synthesis
Subject (DDC): 540: Chemistry
Abstract: 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.
Fulltext version: Published version
License (according to publishing contract): CC BY-NC 3.0: Attribution - Non commercial 3.0 Unported
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Published as part of the ZHAW project: Kontinuierliche Mikroreaktoren für die Synthese von neuen heterogenen Katalysatoren und zur katalytischen Biomasseverwertung
Appears in collections:Publikationen Life Sciences und Facility Management

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