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Thermal degradation kinetics of sepiolite

Published online by Cambridge University Press:  13 March 2020

Yüksel Sarıkaya ,
Müşerref Önal Open the ORCID record for Müşerref Önal [Opens in a new window]  and
Abdullah Devrim Pekdemir
Yüksel Sarıkaya
Affiliation:
Ankara University, Faculty of Science, Department of Chemistry, Tandoğan, 06100Ankara, Turkey
Müşerref Önal*
Affiliation:
Ankara University, Faculty of Science, Department of Chemistry, Tandoğan, 06100Ankara, Turkey
Abdullah Devrim Pekdemir
Affiliation:
Ankara University, Graduate School of Natural and Applied Sciences, Dışkapı, 06110, Ankara, Turkey
*
*Email: [email protected]
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Abstract

The kinetic parameters of the thermal degradation of sepiolite were evaluated with a new method based on thermal analysis data. Thermogravimetric/differential thermal analysis curves were recorded for the natural and preheated sepiolite samples in the temperature range 25–800°C for 4 h. The temperature-dependent height of the exothermic heat flow peak for the thermal decomposition of sepiolite located at ~850°C on the differential thermal analysis curve was taken as a kinetic variable for the thermal degradation. A thermal change coefficient was defined depending on this variable because this coefficient fit to the Arrhenius equation was assumed as a rate constant for the thermal degradation. The Arrhenius plot showed that the degradation occurs in three steps. Two of these are due to stepwise dehydration and the third originated from dehydroxylation of sepiolite. Three activation energies were obtained that increase with the increasing temperature interval of the steps.

Keywords

decompositiondegradationkineticssepiolitethermal analysis
Type
Brief Report
Information
Clay Minerals , Volume 55 , Issue 1 , March 2020 , pp. 96 - 100
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland, 2020

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Footnotes

Associate Editor: Asuman Turkmenoglu

References

Aetahi, A. (1985) Synthesis of sepiolite at room temperature from SiO2 and MgCl2 solution. Clay Minerals, 20, 521–523.Google Scholar
Ahlrichs, J.L., Serna, C. & Serratosa, J.M. (1975) Structural hydroxyls in sepiolites. Clays and Clay Minerals, 23, 119–124.CrossRefGoogle Scholar
Al-Ani A., Gertisser, & Zholobenko, R., V. (2018) Structural features and stability of Spanish sepiolite as a potential catalyst. Applied Clay Science, 162, 297–304.CrossRefGoogle Scholar
Balcı, S. (1999) Effect of heating and pre-treatment on pore size distribution of sepiolite. Clay Minerals, 34, 647–655.CrossRefGoogle Scholar
Brauner, K. & Preisinger, A. (1959) Structur und entstehung des sepioliths. Tschermaks Mineralogische und Petrographische Mitteilungen, 6, 120–140.Google Scholar
Çetişli, H. & Gedikbey, T. (1990) Dissolution, kinetics of sepiolite from Eskişehir (Turkey) in hydrochloric and nitric acids. Clay Minerals, 25, 207–215.CrossRefGoogle Scholar
Dandy, A.J. & Nadiye-Tabbiruka, M.S. (1975) The effect of heating in vacuo on the microporosity of sepiolite. Clays and Clay Minerals, 23, 428–430.CrossRefGoogle Scholar
Ece, Ö.I. & Çoban, F. (1994) Geology, occurrence, and genesis of Eskişehir sepiolites, Turkey. Clays and Clay Minerals, 42, 81–92.CrossRefGoogle Scholar
Erdoğan, B., Demirci, Ş. & Akay, Y. (1996) Treatment of sugar beet juice with bentonite, sepiolite, diatomite, and quartamin to remove color and turbidity. Applied Clay Science, 11, 55–67.CrossRefGoogle Scholar
Fitaroni, L.B., Venâncio, T., Tanaka, F.H., Gimenez, J.C.F., Costa, J.A.S. & Cruz, S.A. (2019) Organically modified sepiolite: thermal treatment and chemical and morphological properties. Applied Clay Science, 179, 1–10.CrossRefGoogle Scholar
Frost, R.L. & Ding, Z. (2003) Controlled rate thermal analysis and differential scanning calorimetry of sepiolites and palygorskites. Thermochimica Acta, 397, 119–128.CrossRefGoogle Scholar
Galan, E. (1996) Properties and applications of palygorskite-sepiolite clays. Clay Minerals, 31, 443–453.CrossRefGoogle Scholar
Göktaş, A.A., Mısırlı, Z. & Baykara, T. (1997) Sintering behaviour of sepiolite. Ceramics International, 23, 305–311.CrossRefGoogle Scholar
González-Santamaria, D.E., Lopez, E., Ruiz, A., Fernández, R., Ortega, A. & Cuevas, J. (2017) Adsorption of phenanthrene by stevensite and sepiolite. Clay Minerals, 52, 341–350.CrossRefGoogle Scholar
Inukai, K., Miyawaki, R., Tomura, S., Shimosaka, K. & Irkeç, T. (1994) Purification of Turkish sepiolite through hydrochloric acid treatments. Applied Clay Science, 9, 11–29.CrossRefGoogle Scholar
Jeans, C.V. (1971) The neoformation of clay minerals in brackish and marine environments. Clay Minerals, 9, 209–217.CrossRefGoogle Scholar
Kiyohiro, T. & Otsuka, R. (1989) Dehydration mechanism of bound water in sepiolite. Thermochimica Acta, 147, 127–138.CrossRefGoogle Scholar
Kulbicki, G. (1959) High temperature phases in sepiolite, attapulgite and saponite. American Mineralogist, 44, 752–758.Google Scholar
McCarter, W.S.W., Krieger, K.A. & Heinemann, H. (1950) Thermal activation of Attapulgus clay: effect on physical and adsorptive properties. Industrial and Engineering Chemistry, 42, 529–533.CrossRefGoogle Scholar
Meşe, E., Figen, A.K., Filiz, B.C. & Pişkin, S. (2018) Cobalt–boron loaded thermal activated Turkish sepiolite composites (Co–B@tSe) as a catalyst for hydrogen delivery. Applied Clay Science, 153, 95–106.CrossRefGoogle Scholar
Mirzaaghaei, M., Goli, S.A.H. & Fathi, G. (2017) Clarification of apple juice using activated sepiolite as a new fining clay. Clay Minerals, 52, 497–508.CrossRefGoogle Scholar
Murray, H.H. (1999) Applied clay mineralogy today and tomorrow. Clay Minerals, 34, 39–49.CrossRefGoogle Scholar
Ogorodova, L.P., Kiseleva, I.A., Vigasina, M.F., Kabalov, Y.K., Grishchenko, R.O. & Mel'chakova, L.V. (2014) Natural sepiolite: enthalpies of dehydration, dehydroxylation, and formation derived from thermochemical studies. American Mineralogist, 99, 2369–2373.CrossRefGoogle Scholar
Önal, M., Yılmaz, H. & Sarıkaya, Y. (2008) Some physicochemical properties of the white sepiolite known as pipestone from Eskişehir, Turkey. Clays and Clay Minerals, 56, 511–519.CrossRefGoogle Scholar
Perraki, T. & Orfanoudaki, A. (2008) Study of raw and thermally treated sepiolite from the Mantoudi area, Euboea, Greece: X-ray diffraction, TG/DTG/DTA and FTIR investigations. Journal of Thermal Analysis and Calorimetry, 91, 589–593.CrossRefGoogle Scholar
Prost, R. (1975) Infrared study of the interactions between the different kinds of water molecules present in sepiolite. Spectrochimica Acta, 31A, 1497–1499.CrossRefGoogle Scholar
Saneeri, M., Goli, S.A.H. & Keramat, J. (2015) Optimization of oil bleaching parameters using response surface methodology, for acid-activated sepiolite from Iran. Clay Minerals, 50, 639–648.CrossRefGoogle Scholar
Sarıkaya, Y., Önal, M. & Pekdemir, A.D. (2019) Kinetic and thermodynamic approaches on thermal degradation of sepiolite crystal using XRD-analysis. Journal of Thermal Analysis and Calorimetry (epub ahead of print) DOI: 10.1007/s10973-019-09053-3.CrossRefGoogle Scholar
Serna, C., Ahlrichs, J.L. & Serratosa, J.M. (1975) Folding in sepiolite crystals. Clays and Clay Minerals, 23, 452–457.CrossRefGoogle Scholar
Shuali, U., Yariv, S., Steinberg, M. & Müller-Vanmoos, M. (1991) Thermal analysis of pyridine-treated sepiolite and palygorskite. Clay Minerals, 26, 497–506.CrossRefGoogle Scholar
Tian, G., Han, G., Wang, F. & Liang, J. (2019) Sepiolite nanomaterials: structure, properties and functional applications. Pp. 135–201 in Nanomaterials from Clay Minerals (Wang, A & Wang, W., editors). Elsevier, Amsterdam, The Netherlands.CrossRefGoogle Scholar
Wang, F., Liang, J., Tang, Q., Chen, C. & Chen, Y. (2014) Channel microstructure and thermal insulation mechanism of sepiolite mineral nanofibers. Journal of Nanoscience and Nanotechnology, 14, 3937–3942.CrossRefGoogle ScholarPubMed
Yebra-Rodriquez, A.Martin-Ramos, J.D., Del Rey, F., Viseras, C. & Lopez-Galindo, A. (2003) Effect of acid treatment on the structure of sepiolite. Clay Minerals, 38, 353–360.CrossRefGoogle Scholar
Yener, N., Önal, M., Üstünışık, G. & Sarıkaya, Y. (2007) Thermal behavior of a mineral mixture of sepiolite and dolomite. Journal of Thermal Analysis and Calorimetry, 88, 813–817.CrossRefGoogle Scholar
Yılmaz, M.S., Kalpaklı, Y. & Pişkin, S. (2013) Thermal behavior and dehydroxylation kinetics of naturally occurring sepiolite and bentonite. Journal of Thermal Analysis and Calorimetry, 114, 1191–1199.CrossRefGoogle Scholar