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A Contact-Point Based Approach for the Analysis of Reactions among Solid Particles

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Title A Contact-Point Based Approach for the Analysis of Reactions among Solid Particles
 
Creator DALVI, VV
SURESH, AK
 
Subject REACTION-KINETICS
solid-solid reactions
contact points
Hao-Tanaka model
 
Description The contact-point framework,(1) which replaces the picture of continuous contact between the reactants by contact at a finite number of points, has been proposed as a rational one for treating reactions among particulate solids. However, available models suffer from various drawbacks, the main one being that they do not show the right asymptotic behavior for large number of contact points. A model is presented here, that corrects these deficiencies. The results show that the contact-point model approaches particle-continuum behavior whenever the number of contact points exceeds 500. The model predictions have been compared with some data from our previous work on calcia-alumina system in the temperature range 1,150-1,300 degrees C. The model fits the data well, with the fitted values of diffusivity (of calcia through alumina) being of the order of 10(-16) m(2)/s. (C) 2010 American Institute of Chemical Engineers AIChE J, 57: 1329-1338, 2010
 
Publisher WILEY-BLACKWELL
 
Date 2012-06-26T03:37:58Z
2012-06-26T03:37:58Z
2011
 
Type Article
 
Identifier AICHE JOURNAL,57(5)1329-1338
0001-1541
http://dx.doi.org/10.1002/aic.12347
http://dspace.library.iitb.ac.in/jspui/handle/100/13881
 
Language English