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|Title: ||Intensification of instantaneous heterogeneous reaction by simple salts and charged microphase|
|Authors: ||HASNAT, A|
|Issue Date: ||1998|
|Publisher: ||AMER INST CHEMICAL ENGINEERS|
|Citation: ||AICHE JOURNAL, 44(3), 656-666|
|Abstract: ||The mass-transfer rate for the instantaneous heterogeneous reaction between N,N-diethylaniline (organic phase) and HCl in the aqueous phase was determined in the presence of a number of supporting electrolytes, that is, NaCl, SrCl2, AlCl3, and cetyltrimethyl ammonium bromide surfactant micelle. Both the simple salts and the cationic surfactant enhance the mass transfer of the reactive H+ ion, the effectiveness being in the order of CTAB > AlCl3 > SrCl2 > NaCl. The experimentally observed enhancement factor for the reaction in the presence of the supporting electrolytes ranges from 1.3 to 6. This enhancement is explained on the basis of the "ion-coupling" effect that augments the diffusive fluxes of the more mobile ionic species in a multi-ion system. The film-theory approximation is used to obtain theoretical estimates of the enhancement factor, and these are found to be in reasonably good agreement with the experimentally obtained values.|
|Appears in Collections:||Article|
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