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Thermal behaviour of ground and unground acid leached vermiculite
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SYSNO ASEP 0379819 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermal behaviour of ground and unground acid leached vermiculite Author(s) Pérez-Maqueda, L. A. (ES)
Maqueda, C. (ES)
Pérez-Rodríguez, J. L. (ES)
Šubrt, Jan (UACH-T) SAI, RID
Černý, Zbyněk (UACH-T) RID, SAI
Balek, V. (CZ)Source Title Journal of Thermal Analysis and Calorimetry. - : Akadémiai Kiadó - ISSN 1388-6150
Roč. 107, č. 2 (2012), s. 431-438Number of pages 8 s. Language eng - English Country HU - Hungary Keywords vermiculite ; grinding ; acid leaching ; DTA ; TG ; EGA ; emanation thermal analysis Subject RIV CA - Inorganic Chemistry R&D Projects LC523 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000299376600003 DOI 10.1007/s10973-011-1480-2 Annotation Acid leaching of vermiculite is an interesting procedure to prepare high surface area porous silica. Thermal behaviour of unground and ground vermiculite leached with HCl solutions has been studied by TG, DTA, ETA and high temperature XRD. Important differences have been observed in the thermal behaviour of unground and ground vermiculite after the acid treatments. Thus, for the acid-treated unground vermiculite, dehydrated vermiculite, enstatite and cristobalite were formed during the heating, while for the acid-treated ground vermiculite only iron oxides and cristobalite phases were observed. Structural modifications due to acid treatment were responsible for changes in the transport properties determined by ETA for the vermiculite samples. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2013
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