Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 107: Issue 1
Thermal decomposition kinetics of magnesite from thermogravimetric data
Authors:
X. W. Liu Civil and Environmental Engineering School, University of Science and Technology, Beijing 100083, China

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Y. L. Feng Civil and Environmental Engineering School, University of Science and Technology, Beijing 100083, China

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H. R. Li National Key State Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, China

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P. Zhang Civil and Environmental Engineering School, University of Science and Technology, Beijing 100083, China

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P. Wang Civil and Environmental Engineering School, University of Science and Technology, Beijing 100083, China

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Pages:
407–412
Online Publication Date:
19 Aug 2011
Publication Date:
01 Jan 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-011-1841-x
Keywords:
Magnesite; TG-DSC; Thermal decomposition; Reaction mechanism; Linear regression
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Abstract

Thermal decomposition kinetics of magnesite were investigated using non-isothermal TG-DSC technique at heating rate (β) of 15, 20, 25, 35, and 40 K min−1. The method combined Friedman equation and Kissinger equation was applied to calculate the E and lgA values. A new multiple rate iso-temperature method was used to determine the magnesite thermal decomposition mechanism function, based on the assumption of a series of mechanism functions. The mechanism corresponding to this value of F(a), which with high correlation coefficient (r-squared value) of linear regression analysis and the slope was equal to −1.000, was selected. And the Malek method was also used to further study the magnesite decomposition kinetics. The research results showed that the decomposition of magnesite was controlled by three-dimension diffusion; mechanism function was the anti-Jander equation, the apparent activation energy (E), and the pre-exponential term (A) were 156.12 kJ mol−1 and 105.61 s−1, respectively. The kinetic equation was
ea
and the calculated results were in accordance with the experiment.

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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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