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Variations in chemistry of macerals as refl ected by micro-scale analysis of a Spanish coal
Mastalerz, M. (Indiana University. Indiana Geological Survey)
Hower, J.C. (University of Kentucky. Center for Applied Energy Research)
Taulbee, D.N. University of Kentucky. Center for Applied Energy Research

Data: 2013
Resum: An Oligocene lignite (Ebro Basin, Spain) and its density fractions were analyzed petrographically and with microscale techniques (electron microprobe and micro-FTIR) to gain insight into differences between individual macerals of low rank high-sulfur coal. The density of the alginite-dominated fraction is below 1. 26g/cm3, and that of the huminite-dominated fraction is above 1. 38g/cm3. Densities within 1. 26-1. 38g/cm3 represent mixtures of liptinite and huminite macerals. With regard to elemental composition, alginite has the highest carbon content (75. 6% on average) and the lowest oxygen content (6. 1% on average). Corpohuminite is characterized by the lowest carbon content (62. 3% on average) and the highest oxygen content (21. 5% on average). Nitrogen contents for corpohuminite and ulminite (~1%) are similar, but are significantly lower in alginite (0. 2% on average). Sulfur content is highest in alginite (13. 4% on average), followed by corpohuminite (9. 8%) and ulminite (7. 7%). Functional group analysis documents large differences between macerals of the huminite and liptinite group, but also indicates differences between individual macerals within both the huminite and liptinite group. These ifferences are most notable in aromaticity, degree of aromatic ring condensations, and hydrocarbon potential.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Lignite ; Macerals ; Elemental composition ; Functional groups
Publicat a: Geologica acta, Vol. 11, Núm. 4 (December 2013) , p. 483-493, ISSN 1696-5728

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DOI: 10.1344/105.000002054

11 p, 578.9 KB

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