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Medientyp: E-Artikel Titel: Maldistribution susceptibility of monolith reactors: Case study of glucose hydrogenation performance Beteiligte: Schubert, Markus; Kost, Sebastian; Lange, Rüdiger; Salmi, Tapio; Haase, Stefan; Hampel, Uwe Erschienen: Wiley, 2016 Erschienen in: AIChE Journal Sprache: Englisch DOI: 10.1002/aic.15334 ISSN: 0001-1541; 1547-5905 Schlagwörter: General Chemical Engineering ; Environmental Engineering ; Biotechnology Entstehung: Anmerkungen: Beschreibung: <jats:p>In this work an ultrafast electron beam X‐ray modality was applied for the first time to characterize the gas–liquid Taylor flow inside each channel of an opaque honeycomb monolith structure ( <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/aic15334-math-0001.png" xlink:title="urn:x-wiley:00011541:media:aic15334:aic15334-math-0001" />) for <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/aic15334-math-0002.png" xlink:title="urn:x-wiley:00011541:media:aic15334:aic15334-math-0002" /> <jats:italic>and</jats:italic> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/aic15334-math-0003.png" xlink:title="urn:x-wiley:00011541:media:aic15334:aic15334-math-0003" />. Significant spatial and temporal deviations in the phase holdup as well as in the gas bubble and liquid slug lengths were found. To evaluate the impact of Taylor flow maldistribution on the reactor performance, the data of more than <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/aic15334-math-0004.png" xlink:title="urn:x-wiley:00011541:media:aic15334:aic15334-math-0004" /> unit cells were used to simulate the reactor productivity in the hydrogenation of glucose. The results verify that a monolith reactor solely designed by using superficial velocities and empirical correlations for gas bubble and liquid slug lengths fails significantly in achieving high product selectivity and the desired conversion. The developed methods are a solid base to design and select proper distributors ensuring the favorable flow configurations for specific chemical processes. © 2016 American Institute of Chemical Engineers <jats:italic>AIChE J</jats:italic>, 62: 4346–4364, 2016</jats:p>