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Processes 2018, 6(5), 44; https://doi.org/10.3390/pr6050044

Cuboid Packed-Beds as Chemical Reactors?

Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada
Received: 12 April 2018 / Revised: 22 April 2018 / Accepted: 23 April 2018 / Published: 1 May 2018
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Abstract

Columns are widely used as packed-bed or fixed-bed reactors in the chemical process industry. Packed columns are also used for carrying out chemical separation techniques such as adsorption, distillation, extraction and chromatography. A combination of the variability in flow path lengths, and the variability of velocity along these flow paths results in significant broadening in solute residence time distribution within columns, particularly in those having low bed height to diameter ratios. Therefore, wide packed-column reactors operate at low efficiencies. Also, for a column of a particular bed height, the ratio of heat transfer surface area to reactor volume varies inversely as the radius. Therefore, with wide columns, the available heat transfer area could become a limiting factor. In recent papers, box-shaped or cuboid packed-bed devices have been proposed as efficient alternatives to packed columns for carrying out chromatographic separations. In this paper, the use of cuboid packed-beds as reactors for carrying out chemical and biochemical reactions has been proposed. This proposition is primarily supported in terms of advantages resulting from superior system hydraulics and narrower residence time distributions. Other potential advantages, such as better heat transfer attributes, are speculated based on geometric considerations. View Full-Text
Keywords: packed-bed reactor; packed column; cuboid packed-bed; chemical reactor; residence time distribution; heat transfer packed-bed reactor; packed column; cuboid packed-bed; chemical reactor; residence time distribution; heat transfer
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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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Ghosh, R. Cuboid Packed-Beds as Chemical Reactors? Processes 2018, 6, 44.

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