Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching

The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfurization of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydroch...

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Autores principales:	Pantović-Spajić Katarina, Marković Branislav, Pavlović Miroslav M., Sokić Miroslav, Zildžović Snežana, Đorđević Nataša, Stojanović Ksenija
Formato:	article
Lenguaje:	EN
Publicado:	Serbian Chemical Society 2021
Materias:	bogovina coal stepwise leaching acidic leaching oxidizing agents leaching ash removal sulfur removal Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/172fe9bc04224e9e9b71585bac733c20
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spelling	oai:doaj.org-article:172fe9bc04224e9e9b71585bac733c202021-11-22T11:03:40ZDeashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching0352-51391820-742110.2298/JSC210719061Phttps://doaj.org/article/172fe9bc04224e9e9b71585bac733c202021-01-01T00:00:00Zhttp://www.doiserbia.nb.rs/img/doi/0352-5139/2021/0352-51392100061P.pdfhttps://doaj.org/toc/0352-5139https://doaj.org/toc/1820-7421The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfurization of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydrochloric, nitric, acetic and citric acids; hydrogen peroxide, mixture of hydrogen peroxide and nitric acid (pH 2), as well as by the stepwise leaching process (nitric acid + mixture of hydrogen peroxide and nitric acid, pH 2). The changes in mineral composition, caused by the chemical leaching, are followed using X-ray diffraction, whereas alterations of coal organic matter are tracked by Fourier-transform infrared spectroscopy and the content of fixed carbon. Inorganic acid leaching, regardless of the temperature and acid concentration, enabled the successful deashing of coal, whereas the percent of desulfurization was insufficient. The organic acid leaching was not satisfactory for both, deashing and desulfurization. Leaching by H2O2 and H2O2/HNO3 mixture (pH 2) resulted in moderate desulfurization, but the ash reduction was low. The most suitable method for the simultaneous effective ash (78 wt.%) and the sulfur (66 wt. %) removal from Bogovina coal is the two-step leaching, combining 10 vol. % HNO3 and mixture of 35 vol. % H2O2/10 vol. % HNO3 of pH 2 at 60°C.Pantović-Spajić KatarinaMarković BranislavPavlović Miroslav M.Sokić MiroslavZildžović SnežanaĐorđević NatašaStojanović KsenijaSerbian Chemical Society articlebogovina coalstepwise leachingacidic leachingoxidizing agents leachingash removalsulfur removalChemistryQD1-999ENJournal of the Serbian Chemical Society, Vol 86, Iss 11, Pp 1113-1126 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bogovina coal stepwise leaching acidic leaching oxidizing agents leaching ash removal sulfur removal Chemistry QD1-999
spellingShingle	bogovina coal stepwise leaching acidic leaching oxidizing agents leaching ash removal sulfur removal Chemistry QD1-999 Pantović-Spajić Katarina Marković Branislav Pavlović Miroslav M. Sokić Miroslav Zildžović Snežana Đorđević Nataša Stojanović Ksenija Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
description	The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfurization of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydrochloric, nitric, acetic and citric acids; hydrogen peroxide, mixture of hydrogen peroxide and nitric acid (pH 2), as well as by the stepwise leaching process (nitric acid + mixture of hydrogen peroxide and nitric acid, pH 2). The changes in mineral composition, caused by the chemical leaching, are followed using X-ray diffraction, whereas alterations of coal organic matter are tracked by Fourier-transform infrared spectroscopy and the content of fixed carbon. Inorganic acid leaching, regardless of the temperature and acid concentration, enabled the successful deashing of coal, whereas the percent of desulfurization was insufficient. The organic acid leaching was not satisfactory for both, deashing and desulfurization. Leaching by H2O2 and H2O2/HNO3 mixture (pH 2) resulted in moderate desulfurization, but the ash reduction was low. The most suitable method for the simultaneous effective ash (78 wt.%) and the sulfur (66 wt. %) removal from Bogovina coal is the two-step leaching, combining 10 vol. % HNO3 and mixture of 35 vol. % H2O2/10 vol. % HNO3 of pH 2 at 60°C.
format	article
author	Pantović-Spajić Katarina Marković Branislav Pavlović Miroslav M. Sokić Miroslav Zildžović Snežana Đorđević Nataša Stojanović Ksenija
author_facet	Pantović-Spajić Katarina Marković Branislav Pavlović Miroslav M. Sokić Miroslav Zildžović Snežana Đorđević Nataša Stojanović Ksenija
author_sort	Pantović-Spajić Katarina
title	Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
title_short	Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
title_full	Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
title_fullStr	Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
title_full_unstemmed	Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
title_sort	deashing and desulfurization of subbituminous coal from the east field (bogovina basin, serbia) - insights from chemical leaching
publisher	Serbian Chemical Society
publishDate	2021
url	https://doaj.org/article/172fe9bc04224e9e9b71585bac733c20
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Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching

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