Record Details

DIFFUSION-CONTROLLED INSTANTANEOUS CHEMICAL-REACTION IN SINGLE DROPS

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title DIFFUSION-CONTROLLED INSTANTANEOUS CHEMICAL-REACTION IN SINGLE DROPS
 
Creator MEHRA, A
VENUGOPAL, BV
 
Subject ammonia gas
boundary
 
Description The problem of mass transfer into a rigid, spherical, liquid drop, accompanied by an instantaneous reaction between the absorbing solute and a diffusing nonvolatile reactant, within the drop, has been investigated. Experiments on a gas-liquid system were carried out with drops suspended from a buret where an acid-base reaction using phenolphthalein as an indicator was utilized to track the moving reaction boundary. A model, for the motion of this reaction front, using a quasi steady state approximation based on the notion of an ''undisturbed'' core, and inspired by the shrinking core model, has been proposed. The experimentally determined position of the reaction front shows a fair degree of agreement with the theory, and some deviation is observed. The observed time for conversion of the complete drop agrees reasonably well with the theoretical predictions. A comparison of the proposed model with the unsteady state, numerical solutions shows that the proposed model is a reasonable analytical approximation for certain combinations of the concentration and diffusivity ratios of the two reacting species.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-13T23:11:22Z
2011-12-26T12:47:26Z
2011-12-27T05:53:54Z
2011-07-13T23:11:22Z
2011-12-26T12:47:26Z
2011-12-27T05:53:54Z
1994
 
Type Article
 
Identifier INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 33(12), 3078-3085
0888-5885
http://dx.doi.org/10.1021/ie00036a024
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3798
http://hdl.handle.net/10054/3798
 
Language en