Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
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10973_2013_3300_ReferencePDF.pdf
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5.1 MB
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833e438743d6fc4c7cdc91e67c7eee7a
Author(s)
Al-Tabbaa, A.
Unluer, Cise
Date Issued
June 2013
Journal
Journal of Thermal Analysis and Calorimetry
Publisher
Springer Netherlands
Citation
Unluer, C., and A. Al-Tabbaa. “Characterization of Light and Heavy Hydrated Magnesium Carbonates Using Thermal Analysis.” Journal of Thermal Analysis and Calorimetry 115.1 (2014): 595–607.
Version
Author's final manuscript
Abstract
Upon heating, hydrated magnesium carbonates (HMCs) undergo a continuous sequence of decomposition reactions. This study aims to investigate the thermal decomposition of various commercially produced HMCs classified as light and heavy, highlight their differences, and provide an insight into their compositions in accordance with the results obtained from thermal analysis and microstructure studies. An understanding of the chemical compositions and microstructures, and a better knowledge of the reactions that take place during the decomposition of HMCs were achieved through the use of SEM, XRD, and TG/differential thermal analysis (DTA). The quantification of their CO[subscript 2] contents was provided by TG and dissolving the samples in HCl acid. Results show that variations exist within the microstructure and decomposition patterns of the two groups of HMCs, which do not exactly fit into the fixed stoichiometry of the known HMCs in the MgO–CO[subscript 2]–H[subscript 2]O system. The occurrence of an exothermic DTA peak was only observed for the heavy HMCs, which was attributed to their high CO[subscript 2]2 contents and the relatively delayed decomposition pattern.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1007/s10973-013-3300-3
