Effect of particle lyophobicity in slurry bubble columns at elevated pressures

J. Schaaf, van der, V.P. Chilekar, J.R. Ommen, van, B.F.M. Kuster, J.T. Tinge, J.C. Schouten

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16 Citations (Scopus)

Abstract

The influence of particle lyophobicity on gas hold-up, homogeneous to churn-turbulent regime transition, and gas–liquid mass transfer is investigated in a 0.15 m diameter slurry bubble column at pressures from 0.1 to 1.3 MPa. An air/nitrogen mixture is bubbled through 0–3 vol% slurries of activated carbon particles or silica particles suspended in demineralized water or organic oil Isopar M. The gas hold-up and flow regime transition point are not influenced by the presence of lyophilic particles. Lyophobic particles shift the regime transition to a higher gas velocity and cause foam formation. The gas–liquid mass transfer coefficient is proportional to the gas hold-up for all investigated slurries and is not affected by the particle lyophobicity and the operating pressure. A correlation is presented to estimate the gas–liquid mass transfer coefficient:
Original languageEnglish
Pages (from-to)5533-5537
JournalChemical Engineering Science
Volume62
Issue number18-20
DOIs
Publication statusPublished - 2007

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