Continuous Flow Aerobic Oxidation of Benzyl Alcohol on RuAl2O3 Catalyst in a Flat Membrane Microchannel Reactor an Experimental and Modelling Study

Journal article

Constantinou, A, Gaowei, W, Ellis, P, Kuhn, S, Enhong, C and Gavriilidis, A (2019). Continuous Flow Aerobic Oxidation of Benzyl Alcohol on RuAl2O3 Catalyst in a Flat Membrane Microchannel Reactor an Experimental and Modelling Study. Chemical Engineering Science. 201, pp. 386-396. https://doi.org/10.1016/j.ces.2019.02.015
AuthorsConstantinou, A, Gaowei, W, Ellis, P, Kuhn, S, Enhong, C and Gavriilidis, A
Abstract

A flat Teflon AF-2400 membrane microchannel reactor was experimentally and theoretically investigated for aerobic oxidation of benzyl alcohol on a 5 wt% Ru/Al2O3 catalyst. The reactor consisted of gas and liquid channels (75 mm (L) × 3 mm (W) × 1 mm (D)), separated by a 0.07 mm thick semipermeable Teflon AF-2400 flat membrane, which
allowed continuous supply of oxygen during the reaction and
imultaneously avoided direct
mixing of gaseous oxygen with organic reactants. A catalyst stability test was first carried out, and the experimental data obtained were used to estimate the kinetics of benzyl alcohol oxidation with a 2D reactor model. Using these kinetics, predictions from the 2D reactor model agreed well with the experimental data obtained at different liquid flow rates and
oxygen pressures. The mass transfer and catalytic reaction in the membrane microchannel reactor were then theoretically studied by changing the membrane thickness, the liquid channel depth, and the reaction rate coefficient. Oxygen transverse mass transport in the
catalyst bed was found to be the controlling process for the system investigated, and decreasing the liquid channel depth is suggested to improve the oxygen supply and enhance the benzyl alcohol conversion in the membrane reactor.

Year2019
JournalChemical Engineering Science
Journal citation201, pp. 386-396
PublisherElsevier
ISSN0009-2509
Digital Object Identifier (DOI)https://doi.org/10.1016/j.ces.2019.02.015
Web address (URL)https://www.sciencedirect.com/science/article/pii/S0009250919301770?via%3Dihub
Publication dates
Print26 Feb 2019
Publication process dates
Deposited01 Mar 2019
Accepted16 Feb 2019
Accepted author manuscript
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Open
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