Enhancement of the Liquid-Side Mass Transfer in a Falling Film Catalytic Microreactor by In-Channel Mixing Structures

Catalytic octanal oxidation with oxygen was performed at 100 °C and the total pressure of 5 and 10 bar in a falling film microreactor with varying reaction plates bearing different in-channel mixing structures. The liquid flow rate was changed in the range of 3.3–17.5 mL/min. The liquid-sided mass t...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2012-07, Vol.51 (26), p.8719-8725
Main Authors: Rebrov, Evgeny V, Duisters, Thijs, Löb, Patrick, Meuldijk, Jan, Hessel, Volker
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Catalysts
Catalytic reactions
Chemical engineering
Chemistry
Computational fluid dynamics
Exact sciences and technology
General and physical chemistry
Heat and mass transfer. Packings, plates
Mass transfer
Mathematical models
Microreactors
Plates (structural members)
Reactors
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Catalytic octanal oxidation with oxygen was performed at 100 °C and the total pressure of 5 and 10 bar in a falling film microreactor with varying reaction plates bearing different in-channel mixing structures. The liquid flow rate was changed in the range of 3.3–17.5 mL/min. The liquid-sided mass transfer over grooved or finned structured plates was enhanced by factors of 1.12 and 1.20, respectively, compared to that on a standard plate with 16 microchannels with dimensions of 1200 μm × 400 μm. The liquid flow rate over the structured plates could be increased by 60%–80% without any loss of octanal conversion. A two-dimensional convection and diffusion model adopted from Al-Rawashdeh et al. [Chem. Eng. Sci. 2008, 63, 5149] was formulated to simulate the reactor behavior, and its predictions describe the experimental results in terms of octanal conversion with an accuracy of 4.3% when the actual temperature distribution in the reactor plate is taken into account.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie301058h