Mass transfer between isobutanol and water in a spray-column

Modelling Mass Transfer Coefficients During Drop Formation

“…Market difference in the rate of mass transfer existed in the rate of transfer from three needles up to a time of formation of at least two seconds. The agitation inside drops formed on the small diameter tube was substantially greater than inside those formed on the wider tube, at least for short formation times, resulting an increase in the rate of transfer At complete formation the mass transfer was about the same for all needle and the rate decrease there after, this is in agreement by observation of many authors [29,30]. A decrease in the transfer rate during the first second after formation and the drop were internally stagnant after another few seconds of life, supports the view that the drop internal circulation initially observed is induced by the formation process.…”

“…Some of the literature data [12] does not give the expected relationship and no account has been taken of the influence of surfactants [29].Skelland and Minhas [29] tested the theoretical models and reported that the models predict lower mass transfer rate than the observed values. This is because allowance was not made for internal circulation, the effect of interfacial turbulence, the influence of drop rise time and disturbances associated with the drop detachment.…”

Mass transfer enhancement through Marangoni instabilities during single drop formation

“…[7,[13][14][15][16], are based on the unsteady-state diffusion theory using different approaches to describe the hydrodynamics of the process. They assume diffusion control and do not take into account internal circulation.…”

Individual film coefficients of mass transfer in liquid‐liquid extraction

“…Ruby and Elgin (17) measured the rates of mass transfer into the continuous phase for five different systems in a spray column, and Heertjes, Holve, and Talsma (9) used a similar technique to measure mass transfer into a continuous water phase from a dispersed isobutanol phase in a spray column. Their columns were greatly simplified in order to count droplets and a special sampling technique was employed to eliminate end effects.…”

“…No interfacial tension data could be found for the isobutyraldehyde-'water system. Diffusivities were estimated by the method of Chang and Wilke (1) except for the system isobutanol-water where experimental values were available from the work of Heertjes, Holve and Talsma (9). All values reported in Table 6 are at the mean temperatures and concentrations of the experiments to which they apply.…”