ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Simultaneous measurements of mass transfer rates to quasisteady-state pendant aqueous droplets and rates of surface renewal due to Marangoni effects have been carried out using the water/toluene system with acetone as solute. The surface renewal measurements were made with the photochromic dye tracer technique reported earlier (Thornton and Anderson, 1981; Thornton et al., 1985).Both the mass transfer coefficients and the rates of surface renewal have been shown to be dependent upon the age of the droplet interface and the solute concentration in the continuous phase. Thus, coefficients of a young droplet are high initially, but decrease with time and approach a constant value, dependent upon solute concentration, as the interface ages.This parallel decrease in both interfacial (Marangoni) activity and transfer rates with time has also been observed (Rogers et al., 1987) with inorganic solutes such as uranyl nitrate and has implications for contactor design.
Additional Material:
15 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690350708
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