The present paper addresses gas-liquid-solids hydrodynamic regimes that establish in a lab-scale internal circulation airlift operated at low superficial gas velocity batch-wise with respect to liquid and solid phases. Silica sand and glass beads have been used as bed solids at hold-up ranging between 4 and 12% by volume. Transition conditions between fixed bed, fluidized bed and solids circulation regimes 14 have been assessed by means of analysis of pressure data, both in the time- and frequency-domains. Gas-liquid mass transfer coefficient and liquid circulation velocity have been measured in the fluidized bed and solids circulation regimes.
Hydrodynamics and Mass Transfer in a Lab-Scale Three-Phase Internal Loop Airlift / Olivieri, Giuseppe; Marzocchella, Antonio; Salatino, Piero. - In: CHEMICAL ENGINEERING JOURNAL. - ISSN 1385-8947. - STAMPA. - 96:(2003), pp. 45-54. [10.1016/j.cej.2003.08.003]
Hydrodynamics and Mass Transfer in a Lab-Scale Three-Phase Internal Loop Airlift
OLIVIERI, GIUSEPPE;MARZOCCHELLA, ANTONIO;SALATINO, PIERO
2003
Abstract
The present paper addresses gas-liquid-solids hydrodynamic regimes that establish in a lab-scale internal circulation airlift operated at low superficial gas velocity batch-wise with respect to liquid and solid phases. Silica sand and glass beads have been used as bed solids at hold-up ranging between 4 and 12% by volume. Transition conditions between fixed bed, fluidized bed and solids circulation regimes 14 have been assessed by means of analysis of pressure data, both in the time- and frequency-domains. Gas-liquid mass transfer coefficient and liquid circulation velocity have been measured in the fluidized bed and solids circulation regimes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
