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Title

Primary tar of different coking coal ranks

AuthorsCasal Banciella, María Dolores ; Díez Díaz-Estébanez, María Antonia ; Álvarez García, Ramón ; Barriocanal Rueda, Carmen
KeywordsCoal
Carbonization
Pyrolysis
Primary tar
Issue Date8-Aug-2008
PublisherElsevier
CitationInternational Journal of Coal Geology 76(3): 237-242 (2008)
AbstractThe aim of the present work is to discuss the differences in the compositions of primary tars collected by means of Gray-King (GK) pyrolysis tests from coking coals of different origin and rank. Ten bituminous coals were pyrolyzed at two different temperatures, 450 and 550°C, which are known to be important in the conversion processes of coal. Low temperature tars were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Gas Chromatography (GC), Gas Chromatography-Mass Spectrometry (GC-MS), and High-Performance Liquid Chromatography (HPLC). The results indicate that low temperature tars are mainly formed by aromatic compounds containing different types of substituents (alkyl, aryl, heteroatomic and heterocyclic). When the coal rank increases, the amount of aliphatic and polar compounds decreases due to the influence of coal composition, while the amount of aromatic compounds such as naphthalenes, phenanthrenes, fluorenes, benzofluorenes, and their alkyl derivatives rises as a consequence of the increase in the aromaticity of the parent coal.
Description6 pages, 7 figures, 5 tables.-- Printed version published on Nov 3, 2008.
Publisher version (URL)http://dx.doi.org/10.1016/j.coal.2008.07.018
URIhttp://hdl.handle.net/10261/11185
DOI10.1016/j.coal.2008.07.018
ISSN0166-5162
Appears in Collections:(INCAR) Artículos
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