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Controlled rate thermal analysis of sepiolite

Frost, Ray L. and Kristof, Janos and Horvath, Erzsebet (2009) Controlled rate thermal analysis of sepiolite. Journal of Thermal Analysis and Calorimetry, 98(2). pp. 423-428.

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DOI: 10.1007/s10973-009-0321-z

Official URL: http://www.akademiai.com/content/h0043u7116j3/?sor...

Abstract

CRTA technology offers better resolution and a more detailed interpretation of the decomposition processes of a clay mineral such as sepiolite 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. Constant-rate decomposition processes of non-isothermal nature reveal changes in the sepiolite as the sepiolite is converted to an anhydride. In the dynamic experiment two dehydration steps are observed over the ~20-170 and 170-350°C temperature range. In the dynamic experiment three dehydroxylation steps are observed over the temperature ranges 201-337, 337-638 and 638-982°C. The CRTA technology enables the separation of the thermal decomposition steps.

ID Code:28325
Item Type:Journal Article
Additional Information:This manuscript is one of a series of papers on the Thermal analysis of minerals using Controlled rate technology
Keywords:attapulgite, sepiolite, palygorskites, thermal analysis, CRTA, thermogravimetry
ISSN:1388-6150
Subjects:Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Catalysis and Mechanisms of Reactions (030601)
Divisions:Schools > School of Physical and Chemical Sciences
QUT Faculties and Divisions > Faculty of Science and Technology
Copyright Owner:Copyright 2009 Akademiai Kiado, Budapest, Hungary
Deposited On:30 Oct 2009 10:40
Last Modified:11 Mar 2010 02:57

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