Non-invasive system and procedures for the characterization of liquid-liquid dispersions

resumo

A novel dispersed phase imaging system for batch/continuous agitated vessels is described in detail, together with the relevant drop-size distribution and data treatment procedures. This system enabled the non-invasive study of toluene-in-water agitated liquid-liquid dispersions. Most of other similar studies are invasive of the system's structure and behavior, which raises questions about the quality of the generated data. Drop-size distributions have been collected and used for testing the representativeness and stability of the samples obtained, and positively assess the physical meaningfulness of the results through the effects of the main operating variables-mean residence time, agitation intensity and dispersed phase hold-up. Inter-drop coalescence clearly shows its effects even in very lean agitated dispersions, and thus cannot be neglected; its modeling, however, is still very much an open question as will be shown in another paper. (C) 2003 Elsevier B.V. All rights reserved.

palavras-chave

DROP SIZE DISTRIBUTION; MASS-TRANSFER; AGITATED DISPERSIONS; DYNAMIC BEHAVIOR; MODEL; HYDRODYNAMICS; CONTACTORS; SIMULATION; VIDEO

categoria

Engineering

autores

Ribeiro, MMM; Guimaraes, MML; Madureira, CMN; Pinto, JJCC

Grupos

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