Authors:
N. Sh. Petro Surface Chemistry Laboratory National Research Centre Dokki, Cairo Egypt

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B. S. Girgis Surface Chemistry Laboratory National Research Centre Dokki, Cairo Egypt

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The thermal treatment of Fe2O3·1.65H2O gives rise to sharp dehydration weight-change waves (310–470 K and 470–670 K) which correspond to the loss of loosely-bound and stronglybound water, respectively. Analysis of the thermal waves was performed by the method of Šatava and Škvara (1969), the modified method of Coats and Redfern (1964) and the method of Blazejowski et al. (1983), and by applying a least squares straight line fit to the data. The A2 andA3 decomposition mechanisms predominate in the first dehydration step, whereas anF1 mechanism seems the best to describe dehydration of the structural water. Activation energies of 21 kJ · mol−1 and 95 kJ·mol−1 are estimated for the first and second steps, respectively.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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