Features of the motion of gel particles in a three-phase bubble column under foaming and non-foaming conditions

Gabriel Salierno, Mauricio Maestri, Miryan Cassanello*, Maria Angelica Cardona, Daniel Hojman, Hector Somacal

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Features of the motion of gel particles in a three-phase bubble column with non-foaming and foaming gas–liquid systems, determined by using experiments of radioactive particle tracking (RPT), have been compared. The tracer used is a gel particle which resembles typical immobilized biocatalyst. The tracer trajectory is analyzed to extract relevant information for design purposes. The solid velocity field, turbulence parameters, dispersion coefficients, mixing times and flow transitions are determined and compared. The presence of foam significantly affects many quantified parameters, especially within the heterogeneous flow regime. The hydrodynamic stresses are reduced in the presence of foam, especially close to the disengagement. The dispersion coefficients also decrease, and the solid mixing time is only slightly affected by the presence of foam. Gas holdup, inferred both from RPT experiments and from gamma ray scanning, is higher for foaming systems and leads to a shift in the transition gas velocity towards higher values. © 2017 Elsevier B.V.
Original languageEnglish
JournalChinese Journal of Chemical Engineering
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

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