Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 86: Issue 2
Thermal evolution of microporous nitroprussides on their dehydration process
Authors:
E. Torres-Garcia Instituto Mexicano del Ptróleo México D.F. México 07730 eje Lázaro Cárdenas 152, San Bartolo Atepehuacan

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J. Balmaseda University of Havana Institute of Materials Science and Technology Havana Cuba 10400

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L. del Castillo National Autonomous University of Mexico Materials Research Institute Mexico D.F. Mexico 04510

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E. Reguera University of Havana Institute of Materials Science and Technology Havana Cuba 10400

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Pages:
371–377
Online Publication Date:
12 Oct 2006
Publication Date:
01 Nov 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-7385-1
Keywords:
dehydration kinetics; Hi-Res TGA; nitroprussides; thermal analysis; TMDSC
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Abstract  

Divalent transition metal nitroprussides form a family of microporous materials which lose their crystallization water (coordinated and zeolitic) below 100°C and then remain stable up to above 150°C. The dehydration process of representative samples in their stable phases was studied by thermo-gravimetry (TG) and differential scanning calorimetry (DSC). The copper complex dehydrates in a single step through a practically irreversible process. For cadmium and cobalt complexes the water evolution on heating takes place in two stages. The first one, where only zeolitic waters are removed, is dominated by a diffusion mechanism while, during the loss of the strongly bonded waters (second stage) the material framework effect is added. The involved activation energy and its dependence on the conversion degree were estimated evaluating the thermo-gravimetric data according to an isoconversion model.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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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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