Abstract
Four oil shale samples with different amounts of organic and mineral matter were analysed through non-isothermal thermogravimetric analysis using a heating rate of 50 °C min−1 in nitrogen. The goal of the paper is to study the supposed catalytic effect of the indigenous and removed minerals. The samples contained 30, 49, 70 and 90% of organic matter, respectively. X-ray diffraction analysis was used to identify the minerals in the samples. Thermal analysis experiments were carried out up to temperatures of 850 °C in pyrolysis conditions. The mass loss data were used to study the variations in the conversion profiles of the organic matter depending on the content of the mineral matter. The obtained data and the comparison of the sample composition show that the effect of the mineral matter amount on the course of the pyrolysis processes is insignificant.
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Acknowledgements
This work has been partially supported by ASTRA “TUT Institutional Development Program for 2016-2022” Graduate School of Functional materials and technologies (2014-2020.4.01.16-0032). Special thanks go to Gert Preegel, Ph.D., for the procurement of some of the samples.
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Maaten, B., Loo, L., Konist, A. et al. Mineral matter effect on the decomposition of Ca-rich oil shale. J Therm Anal Calorim 131, 2087–2091 (2018). https://doi.org/10.1007/s10973-017-6823-1
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DOI: https://doi.org/10.1007/s10973-017-6823-1