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Controlled rate thermal analysis of sepiolite

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

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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.

Impact and interest:

16 citations in Scopus
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7 citations in Web of Science®

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65 since deposited on 30 Oct 2009
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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
DOI: 10.1007/s10973-009-0321-z
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: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2009 Akademiai Kiado, Budapest, Hungary
Deposited On: 30 Oct 2009 10:40
Last Modified: 01 Mar 2012 00:07

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