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- Title
Study on the thermal decomposition of crocidolite asbestos.
- Authors
Kusiorowski, Robert; Zaremba, Teresa; Gerle, Anna; Piotrowski, Jerzy; Simka, Wojciech; Adamek, Jakub
- Abstract
The thermal behaviour of two crocidolite asbestos samples was characterized. Infrared spectroscopy (FT-IR), powder X-ray diffraction, scanning electron microscopy and thermal analysis (DTA and TG) with evolved gas analysis were carried out on samples of crocidolite asbestos as received and after heating in order to observe their structural changes and dehydroxylation process. The results show that the dehydroxylation process of crocidolite asbestos occurs at different temperatures and is in the range 400-650 °C. This temperature is dependent on the origin of asbestos samples and may be associated with an increased amount of magnesium in the structure of asbestos. For the sample which comes from the Republic of South Africa, the dehydroxylation process occurs at lower temperature in contrast to Russian crocidolite asbestos sample from cement-asbestos material. However, this temperature range is lower than those reported by some authors, who state that the decomposition temperature of crocidolite should be at least 900 °C. This finding may have a significant influence on thermal utilization of asbestos materials, e.g. cement-asbestos, because the temperature of the heat treatment in the utilization process should be as low as possible.
- Subjects
CHEMICAL decomposition; RIEBECKITE; ASBESTOS; INFRARED spectroscopy; THERMAL analysis; TEMPERATURE effect
- Publication
Journal of Thermal Analysis & Calorimetry, 2015, Vol 120, Issue 3, p1585
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-015-4421-7