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Kinetics of thermal decomposition of CuSO 4 · 5H 2 O to CuO
Author(s) -
Gadalla Ahmed M.
Publication year - 1984
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550160604
Subject(s) - chemistry , activation energy , thermogravimetric analysis , calcination , kinetics , kinetic energy , thermal decomposition , dehydration , decomposition , dissociation (chemistry) , particle size , thermodynamics , organic chemistry , catalysis , biochemistry , physics , quantum mechanics
The effect of particle size, type of crucible, and heating rate on the thermal curves obtained simultaneously for CuSO 4 · 5H 2 O were discussed. The dissociation steps were confirmed. Thermogravimetric techniques for determining the rate‐controlling processes and kinetic parameters were applied for the dehydration steps and the calcination of CuSO 4 and CuSO 4 · CuO. For the dehydration of the monohydrate one mechanism operates but the activation energy and preexponential factor vary over wide ranges. Differentiating between various mechanisms using the same technique was sometimes difficult giving completely different values for the kinetic parameters. In view of such difficulties the various methods were assessed, the best techniques to treat similar results were recommended and the operating mechanisms and kinetic parameters for the various steps were thus established.