Record Details

Heterogeneous modeling of gas absorption in emulsions

DSpace at IIT Bombay

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Field Value
 
Title Heterogeneous modeling of gas absorption in emulsions
 
Creator MEHRA, A
 
Subject 3-phase mass-transfer
multiphase reactions
slurry reactors
oxygen-transfer
organic-phase
enhancement
particles
intensification
microphase
 
Description A heterogeneous, multilayer, mass-transfer model is proposed: for explaining the effect of dispersed microparticles/microdroplets, which act as solubilizing and/or reactive agents, in enhancing the specific rate of interphase transport. The behavior of the mass-transfer rate with respect to the various parameters, such as microdispersed-phase holdup, partition coefficient of the solute between the microparticles and continuous phase, microparticle size, various rate constants, etc., has been modeled. Specific issues, such as the effect of multiple microparticle layers near the interphase boundary, the location of the first layer of microparticles closest to this boundary, and the incorporation of rate-retarding effects arising out of high apparent viscosities of the overall dispersion, have been addressed, for the first time. It is shown that the heterogeneous approach should be preferred when the dispersed-phase sizes, are on the order of(but still less than) the diffusional lengths of the rate-limiting diffusant. The proposed model has been validated by analyzing experimental data from the literature, and it has been shown that it works well for the cases of high microphase holdups or large microparticle sizes.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T06:34:18Z
2011-12-26T12:48:14Z
2011-12-27T05:47:01Z
2011-07-14T06:34:18Z
2011-12-26T12:48:14Z
2011-12-27T05:47:01Z
1999
 
Type Article
 
Identifier INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 38(6), 2460-2468
0888-5885
http://dx.doi.org/10.1021/ie980653c
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3882
http://hdl.handle.net/10054/3882
 
Language en