ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The kinetics of the reactions between mixed powders BaCO3 and CuO, as well as BaCO3 and Y2O3, have been studied using DXRD techniques as a function of particle size, temperature, and CO2 pressure. Except for intial nucleation phenomena, the reaction ration rates are governed by shrinking core bahavior for BaCO3 particle sizes between 6 and 33 μm. During the initial stages of the reactions, the surface reaction kinetics are gare governing, whereas the diffusion of CuO, Y2O3, and CO2 are limiting factors at later stages in the reactions. Quantitative conversion dat were used to determine the values of the activation energies and the pertinent diffucivities in these systems.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690410713
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