Reduction of Dispersion in Ultrasonically-Enhanced Micropacked Beds

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Title: Reduction of Dispersion in Ultrasonically-Enhanced Micropacked Beds
Authors: Navarro-Brull, Francisco J. | Teixeira, Andrew R. | Zhang, Jisong | Gómez, Roberto | Jensen, Klavs F.
Research Group/s: Grupo de Fotoquímica y Electroquímica de Semiconductores (GFES)
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Microreactor | Channeling | Capillary fingering | Ultrasound | Fluidization | Sonochemistry | Multiphase | Hydrodynamics
Knowledge Area: Química Física
Issue Date: 30-Nov-2017
Publisher: American Chemical Society
Citation: Industrial & Engineering Chemistry Research. 2018, 57(1): 122-128. doi:10.1021/acs.iecr.7b03876
Abstract: Channeling of gas can reduce mass transfer performance in multiphase micropacked-bed reactors. Viscous and capillary forces cause this undesired and often unpredictable phenomenon in systems with catalyst particle sizes of hundreds of micrometers. In this work, we acoustically modify flow in a micropacked-bed reactor to reduce gas channeling by applying high-power sonication at low ultrasonic frequencies (∼40 kHz). Experimental residence time distributions reveal two orders of magnitude reduction in dispersion with ultrasound, allowing for nearly plug-flow behavior at high flow rates in the bed. Sonication appears to partially fluidize the packed-bed under pressurized cocurrent two-phase flow, effectively improving dispersion characteristics.
Sponsor: This research was partially funded by the EU project MAPSYN: Microwave, Acoustic and Plasma SYNtheses, under Grant CPIP 309376 of the European Union Seventh Framework Program.
ISSN: 0888-5885 (Print) | 1520-5045 (Online)
DOI: 10.1021/acs.iecr.7b03876
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 American Chemical Society
Peer Review: si
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Appears in Collections:INV - GFES - Artículos de Revistas
Research funded by the EU

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