Journal ArticleDOI
The effect of procedural variables on TG, DTG and DTA curves of magnesite and dolomite
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TLDR
The second stage of the decomposition of dolomite is strongly dependent on these procedural variables and behaves in a manner that would be predicted for a sample of calcite diluted with magnesia as discussed by the authors.Abstract:
TG, DTG and DTA curves of magnesite are dependent on procedural variables, especially sample mass, heating rate and partial pressure of carbon dioxide, in a similar manner to those of calcite [1], although the magnitude of the effect is less for magnesite. The first stage of the decomposition of dolomite varies with increasing partial pressure of carbon dioxide in an anomalous manner and hence the effects of these procedural variables (except heating rate) are not similar to those observed for magnesite and calcite. The second stage of the decomposition of dolomite is, however, strongly dependent on these procedural variables and behaves in a manner that would be predicted for a sample of calcite diluted with magnesia. A 1∶1 molar mixture of magnesite and calcite also behaves as would be predicted from the behaviour of the single carbonates but differently from that of dolomite.read more
Citations
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Magnesia-Based Cements: A Journey of 150 Years, and Cements for the Future?
Sam A. Walling,John L. Provis +1 more
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Structure and properties of binder gels formed in the system Mg(OH)2–SiO2–H2O for immobilisation of Magnox sludge
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Kinetic analysis of thermogravimetric data obtained under linear temperature programming—a method based on calculations of the temperature integral by interpolation
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Journal ArticleDOI
Thermal decomposition of dolomite and the extraction of its constituents
P.G. Caceres,E.K Attiogbe +1 more
TL;DR: In this paper, the main variables affecting the separation of magnesium and calcium carbonates from dolomite using partial thermal decomposition followed by hydration and recarbonation processes were identified and optimized.
Journal ArticleDOI
Thermal Activation of Antigorite for Mineralization of CO2
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References
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Journal ArticleDOI
The thermal decomposition of dolomite
TL;DR: The thermal decomposition of dolomite, CaMg(CO 3 ) 2, has been studied by obtaining thermogravimetric and differential thermal analysis curves in various controlled atmospheres involving the use of N 2 )-CO 2 mixtures as mentioned in this paper.
Journal ArticleDOI
The effect of CO2 pressure and alkali salt on the mechanism of decomposition of dolomite
W.R. Bandi,G. Krapf +1 more
TL;DR: In this article, a detailed investigation of the mechanism of decomposition of dolomite in a specially designed thermal apparatus has been performed, and it has been shown that CO2 pressure affects both the initial decomposition temperature into MgO and CaCO3 and the final decomposition temperatures in opposite directions.
Journal ArticleDOI
The effect of procedural variables on TG, DTG and DTA curves of calcium carbonate
TL;DR: The effect of procedural variables, including sample mass, heating rate, particle size and partial pressure of carbon dioxide, on TG, DTG and DTA curves for the decomposition of A R calcium carbonate and limestone has been studied as discussed by the authors.
Journal ArticleDOI
The thermal dissociation of some carbonate minerals
S. St. J. Warne,R. C. Mackenzie +1 more
TL;DR: In this article, the peak-temperature shifts reported for mixtures of synthetic carbonates were attributed entirely to dilution effects, and the exception of magnesite in the presence of siderite maintains its peak position, due simply to the fact that both minerals give similarly sized peaks at approximately the same temperature.
Journal ArticleDOI
Studies on the thermal dissociation of some carbonate minerals
K. V. G. K. Gokhale,T. C. Rao +1 more
TL;DR: In this article, a systematic study of this phenomenon using pure compounds with controlled grain size and other affecting parameters may help in understanding the dissociation curves of natural carbonate aggregates.