NDLI: Dynamic and controlled rate thermal analysis of hydrozincite and smithsonite

Content Provider	Springer Nature Link
Author	Vágvölgyi, Veronika Hales, M. Martens, W. Kristóf, J. Horváth, Erzsébet Frost, R. L.
Copyright Year	2008
Abstract	The understanding of the thermal stability of zinc carbonates and the relative stability of hydrous carbonates including hydrozincite and hydromagnesite is extremely important to the sequestration process for the removal of atmospheric CO$_{2}$. The hydration-carbonation or hydration-and-carbonation reaction path in the ZnO-CO$_{2}$-H$_{2}$O system at ambient temperature and atmospheric CO$_{2}$ is of environmental significance from the standpoint of carbon balance and the removal of green house gases from the atmosphere.The dynamic thermal analysis of hydrozincite shows a 22.1% mass loss at 247°C. The controlled rate thermal analysis (CRTA) pattern of hydrozincite shows dehydration at 38°C, some dehydroxylation at 170°C and dehydroxylation and decarbonation in a long isothermal step at 190°C. The CRTA pattern of smithsonite shows a long isothermal decomposition with loss of CO$_{2}$ at 226°C. CRTA technology offers better resolution and a more detailed interpretation of the decomposition processes of zinc carbonate minerals via approaching equilibrium conditions of decomposition through the elimination of the slow transfer of heat to the sample as a controlling parameter on the process of decomposition. The CRTA technology offers a mechanism for the study of the thermal decomposition and relative stability of minerals such as hydrozincite and smithsonite.
Starting Page	911
Ending Page	916
Page Count	6
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	92
Issue Number	3
e-ISSN	15728943
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-07-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CRTA hydrozincite smithsonite thermal analysis thermogravimetry Measurement Science, Instrumentation Inorganic Chemistry Polymer Sciences Analytical Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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