Characterization of light and heavy hydrated magnesium carbonates using thermal analysis

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 co...

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Main Authors: Unluer, C., Al-Tabbaa, A.
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2014
Subjects:
Online Access:https://hdl.handle.net/10356/106373
http://hdl.handle.net/10220/24024
http://dx.doi.org/10.1007/s10973-013-3300-3
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1063732019-12-06T22:10:08Z Characterization of light and heavy hydrated magnesium carbonates using thermal analysis Unluer, C. Al-Tabbaa, A. School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Structures and design 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 CO2 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–CO2–H2O system. The occurrence of an exothermic DTA peak was only observed for the heavy HMCs, which was attributed to their high CO2 contents and the relatively delayed decomposition pattern. Accepted version 2014-10-14T02:47:17Z 2019-12-06T22:10:08Z 2014-10-14T02:47:17Z 2019-12-06T22:10:08Z 2014 2014 Journal Article Unluer, C., & Al-Tabbaa, A. (2014). Characterization of light and heavy hydrated magnesium carbonates using thermal analysis. Journal of thermal analysis and calorimetry, 115(1), 595-607. https://hdl.handle.net/10356/106373 http://hdl.handle.net/10220/24024 http://dx.doi.org/10.1007/s10973-013-3300-3 en Journal of thermal analysis and calorimetry © 2014 Akadémiai Kiadó. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Thermal Analysis and Calorimetry, Akadémiai Kiadó. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1007/s10973-013-3300-3. 18 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering::Structures and design
spellingShingle DRNTU::Engineering::Civil engineering::Structures and design
Unluer, C.
Al-Tabbaa, A.
Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
description 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 CO2 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–CO2–H2O system. The occurrence of an exothermic DTA peak was only observed for the heavy HMCs, which was attributed to their high CO2 contents and the relatively delayed decomposition pattern.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Unluer, C.
Al-Tabbaa, A.
format Article
author Unluer, C.
Al-Tabbaa, A.
author_sort Unluer, C.
title Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
title_short Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
title_full Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
title_fullStr Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
title_full_unstemmed Characterization of light and heavy hydrated magnesium carbonates using thermal analysis
title_sort characterization of light and heavy hydrated magnesium carbonates using thermal analysis
publishDate 2014
url https://hdl.handle.net/10356/106373
http://hdl.handle.net/10220/24024
http://dx.doi.org/10.1007/s10973-013-3300-3
_version_ 1681037840043999232