Effect of pellet size on PSA performance: monolayer and multilayer bed case study for biogas upgrading

Alejandro Zapata Ballesteros, Niels De Witte, Joeri Denayer, Tom Van Assche

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1 Citation (Scopus)
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Abstract

A demand-driven pressure swing adsorption biogas upgrading application is modelled using monolayer and multilayered (bilayer) beds, to gain insight on the impact of the adsorbent pellet size on the overall performance of such processes. Pellet radii in the range of 0.1–2.4 mm were studied, for fixed cycle settings and column dimensions. Varying the pellet size influences the sorption kinetics and flow resistance, resulting in the existence of an optimum pellet size for monolayered beds. For fixed cycle settings, small pellets may yield higher purities at low total productivities, yet show a more rapid decrease in product purity with increasing productivities due to the higher pressure drop. Furthermore, 18 configurations with beds containing a layer of larger pellets and a second layer of smaller pellets (bilayer) were investigated. Bilayered beds with 0.3 mm, 0.6 and 2.4 mm radius pellets were combined, with the first layer taking up 25, 50 or 75% of the bed. With respect to upward flow in the adsorption step, beds with the smallest pellet size in the top layer (LS beds) can offer higher product purity than beds with the smallest pellet in the bottom layer (SL beds).
Original languageEnglish
Pages (from-to)197-208
Number of pages12
JournalAdsorption-Journal of the International Adsorption Society
Volume28
Issue number5-6
DOIs
Publication statusPublished - 10 Aug 2022

Bibliographical note

Funding Information:
Research results presented in this work are part of the 5FP Research Project G1RD-2001-00659(2002-2005), Smart Structural Diagnostics using Piezo-Generated Elastic Waves - PIEZODIAGNOSTICS, supported by the European Commission and the Spanish Government (Plan Nacional de Investigación Científica, Desarrollo e Innovación Tec-nológica, Ministerio de Ciencia y Tecnología) through the coordinated research project DPI2003-07146-C02-02.

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Copyright:
Copyright 2022 Elsevier B.V., All rights reserved.

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