Fluid dynamics and mass transfer in a bubble column with suspended particles

Abstract

Slurry bubble columns are widely used in biotechnology . Therefore, the effects of solid particles on fluidization characteristics, gas hold-up and volumetric liquid-side mass transfer coefficient were measured in a slurry bubble column (i.d. 0.14 m). The density and diameter of the suspended particles were similar to those applied in biotechnology with immobilized bacteria. Based on models of turbulence and of liquid circulation induced by rising gas bubbles, equations for critical gas velocity, gas hold-up and volumetric liquid-side mass transfer coefficient were obtained by dimensional analysis.

New Approaches for Theoretical Estimation of Mass Transfer Parameters in Both Gas-Liquid and Slurry Bubble Columns

“…Muller and Davidson (1992) have shown that small-class bubbles contribute 20-50 % of the gas-liquid mass transfer in a column with highly viscous liquid. Addition of solid particles to liquid in a bubble column reduces the gas holdup and correlations of gas holdup valid for transition and heterogeneous flow regimes were proposed by Koide et al (1984), Sauer and Hempel (1987) and Salvacion et al (1995). Wilkinson et al (1992) have summarized some of the most important gas holdup correlations and have discussed the role of gas density.…”

“…For these cases, Koide et al (1984) and Yasunishi et al (1986) proposed correlations for k L a prediction. Sauer and Hempel (1987) proposed k L a correlations for bubble columns with suspended particles. Sada et al (1986) and proposed correlations for k L a prediction in bubble columns with solid particles of diameter less than 10 µm.…”

A Study on CO2 Absorption in Bubble Column Using DEEA/EEA Mixed Solvent

“…The results can provide references for bubble column design. The bubble column features simple structure, easy operation, cost efficiency and excellent scrubbing factor as compared with other scrubbers (Chen et al, 2008;Lin et al, 2003;Sauer and Hempel, 1987;Aroonwilas et al, 1999), without mechanical heat production. Thus, recovery of CO2 using bubble columns can reduce costs and save energy.…”

Absorption of Carbon Dioxide in a Bubble-Column Scrubber

“…The liquid may flow through the column either with or against the gas flow. Investigations of bubblecolumns from the viewpoints of both environmental problems and industrial use can be found in the literature (Juvekar & Sharma, 1973;Sada et al, 1985;Sauer & Hempel, 1987;Okawa et al, 1999;Chen et al, 2002;Hamid & Jones, 2002;Lapin et al, 2002). Bubble column reactors are widely used in the chemical, petrochemical, biochemical, and metallurgical industries (Degaleesan & Dudukovic, 1998).…”

“…In addition, some investigators (Sauer & Hempel, 1987;Hamid & Jones, 2002) have studied the dynamics, mass transfer, and control of the crystal size and shape of products for industrial purposes. However, these data cannot be utilized effectively.…”