Abstract
The regularities of mass transfer with a chemical reaction in the system of aqueous solution of sodium hydroxide (solid medium) / butyric acid (transportable component) / carbon tetrachloride (dispersed phase) in spray extractors are studied. It is shown that the resulting chemocapillary instability can significantly reduce the height of the transfer unit. The conditions for the occurrence of spontaneous concentration-capillary convection during mass transfer with a chemical reaction under conditions of constrained drop movement are determined.
Highlights
One of the ways to increase the efficiency of gravity extractors is to conduct mass transfer processes in the interfacial instability mode
Experiments conducted to study mass transfer with chemical reaction at the spherical prase boundary [1] showed that the mass transfer rate significantly depends on the spontaneous interphase convection (SIC) that occurs in the extraction system
Longitudinal mixing can have a significant impact on the driving force of the mass transfer process, which is due to the uneven distribution of flows across the cross-section of the apparatus, based on this, longitudinal mixing can affect the intensity of mass transfer in interphase instability mode and SIC driving force
Summary
One of the ways to increase the efficiency of gravity extractors is to conduct mass transfer processes in the interfacial instability mode. In gravity extractors, when one of the phases is dispersed, the effect of concentrationcapillary convection on the kinetics of mass transfer with chemical reaction is likely to be different than when transferring from a single drop (to a drop) These patterns are associated with the fragmentation and fusion of drops, and as a result of this change in the interfacial surface, their size in height and cross-section of the apparatus. As it is known, longitudinal mixing can have a significant impact on the driving force of the mass transfer process, which is due to the uneven distribution of flows across the cross-section of the apparatus, based on this, longitudinal mixing can affect the intensity of mass transfer in interphase instability mode and SIC driving force. Purposes and objectives it is necessary to determine whether there is a concentration-capillary instability during mass transfer with chemical reaction under conditions of constrained drop movement in gravity extractors? How does the concentration-capillary instability affect the intensity of mass transfer with a chemical reaction and the efficiency of column extractors?
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