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Catalysts 2019, 9(1), 95; https://doi.org/10.3390/catal9010095

Improving Productivity of Multiphase Flow Aerobic Oxidation Using a Tube-in-Tube Membrane Contactor

1
Department of Chemical and Life Science Engineering, Virginia Commonwealth University, 601 W. Main St., Richmond, VA 23284-3028, USA
2
Venebio Group, LLC, 7400 Beauford Springs Drive, Suite 300 Richmond, VA 23225, USA
*
Authors to whom correspondence should be addressed.
Received: 28 November 2018 / Revised: 21 December 2018 / Accepted: 12 January 2019 / Published: 17 January 2019
(This article belongs to the Special Issue Catalytic Methods in Flow Chemistry)
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Abstract

The application of flow reactors in multiphase catalytic reactions represents a promising approach for enhancing the efficiency of this important class of chemical reactions. We developed a simple approach to improve the reactor productivity of multiphase catalytic reactions performed using a flow chemistry unit with a packed bed reactor. Specifically, a tube-in-tube membrane contactor (sparger) integrated in-line with the flow reactor has been successfully applied to the aerobic oxidation of benzyl alcohol to benzaldehyde utilizing a heterogeneous palladium catalyst in the packed bed. We examined the effect of sparger hydrodynamics on reactor productivity quantified by space time yield (STY). Implementation of the sparger, versus segmented flow achieved with the built in gas dosing module (1) increased reactor productivity 4-fold quantified by space time yield while maintaining high selectivity and (2) improved process safety as demonstrated by lower effective operating pressures. View Full-Text
Keywords: flow chemistry; continuous reactor; tube-in-tube; multiphase catalysis; oxidation; aerobic flow chemistry; continuous reactor; tube-in-tube; multiphase catalysis; oxidation; aerobic
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Burkholder, M.; Gilliland, S.E., III; Luxon, A.; Tang, C.; Gupton, B.F. Improving Productivity of Multiphase Flow Aerobic Oxidation Using a Tube-in-Tube Membrane Contactor. Catalysts 2019, 9, 95.

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