An Experimental Study of Gas Holdup in Two-Phase Bubble Columns with Foaming Liquids

L. Z. Pino, M. M. Yépez, Avelino E Saez, G. De Drago

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Gas-liquid upward flow experiments have been performed in • two bubble columns of different diameters (0.10 and 0.29 m,) using air as gas phase and several liquids: water, aqueous solutions of ethanol and glycerine, kerosene, and a solution of a surfactant in kerosene. The main goal of the study is the analysis of foaming systems, including the comparison of their behavior with respect to non-foaming systems. The gas holdup was determined experimentally as a function of the gas and liquid superficial velocities in bubbling, churn-turbulent and foaming regimes. It was found that, for foaming systems, semi-batch operation enhances foam formation, yielding higher holdups than those obtained in continuous operation at very low liquid velocities. Opposite to what is observed in non-foaming systems, the liquid superficial velocity affects the gas holdup appreciably in foaming systems. An increase in column diameter results in a decrease in gas holdup for all the systems studied. In aqueous foaming systems, this trend is more drastic since foam is inhibited as the column diameter increases.

Original languageEnglish (US)
Pages (from-to)155-175
Number of pages21
JournalChemical Engineering Communications
Volume89
Issue number1
DOIs
StatePublished - 1990
Externally publishedYes

Fingerprint

Bubble columns
Gases
Liquids
Kerosene
Foams
Glycerol
Surface-Active Agents
Surface active agents
Ethanol
Water
Air
Experiments

Keywords

  • Bubble column
  • Foaming
  • Gas holdup

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

An Experimental Study of Gas Holdup in Two-Phase Bubble Columns with Foaming Liquids. / Pino, L. Z.; Yépez, M. M.; Saez, Avelino E; De Drago, G.

In: Chemical Engineering Communications, Vol. 89, No. 1, 1990, p. 155-175.

Research output: Contribution to journalArticle

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