Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 107: Issue 2
Thermal decomposition of hydromagnesite
Effect of morphology on the kinetic parameters
Authors:
D. Bhattacharjya Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India

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T. Selvamani Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India

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Indrajit Mukhopadhyay Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India
School of Solar Energy, Pandit Deendayal Petroleum University, Raisan, Gandhinagar 382007, Gujarat, India

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Pages:
439–445
Online Publication Date:
24 Jul 2011
Publication Date:
01 Feb 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-011-1656-9
Keywords:
Synthetic hydromagnesite; Micro-sheets; Non-isothermal decomposition; Arrhenius equation; Activation energy
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Abstract

Non isothermal decomposition of synthetically prepared hydromagnesite phase with two different morphologies (2-D micro sheets and nests) was studied in dynamic nitrogen atmosphere by thermogravimetric analysis, differential thermogravimetric analysis, and differential scanning calorimetric techniques. Two different kinetic models, i.e. the Friedman isoconversion and the Flynn–Wall methods were employed for the analysis of thermal decomposition. The apparent activation energy (Ea) of the hydromagnesite phases having 2-D micro sheet and nest morphology were calculated and compared. The activation energy of nest morphology was found to be relatively higher than 2-D micro sheets. The higher activation energy for the relatively close packed ‘nest’ morphology is attributed to the difficulty of thermal transport in the core.

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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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