Mineralogy and Geochemistry of Feed Coals and Combustion Residues from Tunçbilek and Seyitömer Coal-Fired Power Plants in Western Turkey

Authors

Ali Ihsan Karayigit, Department of Geological Engineering, Hacettepe University, 06800 Ankara, Turkey
Ozlem Yigitler, Department of Geological Engineering, Hacettepe University, 06800 Ankara, Turkey
Seda Iserli, Department of Geological Engineering, Hacettepe University, 06800 Ankara, Turkey
Xavier Querol, Institute of Environmental Assessment and Water Research (IDÆA), Consejo Superior de Investigaciones Científicas (CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
Maria Mastalerz, Institute of Environmental Assessment and Water Research (IDÆA), Consejo Superior de Investigaciones Científicas (CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
Riza Gorkem Oskay, Department of Geological Engineering, Hacettepe University, 06800 Ankara, Turkey
James C. Hower, University of Kentucky Center for Applied Energy Research, 2540 Research Park Drive, Lexington, KY 40511, USA

Document Type

Article

Abstract

This study focuses on the enrichment of elements in feed coal (FC) and combustion residues, namely, fly ash (FA) and bottom ash (BA) samples, picked up from the Tunçbilek and Seyitömer coal-fired power plants in western Turkey. The FCs in both plants have generally similar mineralogical compositions, although siderite and dolomite are more prominent in Tunçbilek and feldspar and pyrite are more abundant in Seyitömer. Minerals in the FA from both power plants are mainly quartz, hematite, magnetite, anhydrite, and mullite. Along with quartz, the Fe-oxides are dominant phases in the BA samples. Accessory minerals in the FCs, FAs, and BAs, such as chromite and pentlandite, were identified by combined scanning electron microscopy–energy dispersive X-ray analysis. Significant enrichments of Cr and Ni were detected in FCs, FAs, and BAs from both power plants. These enrichments are probably associated with pyrite, chromite, and pentlandite. Mercury was also significantly enriched in the Seyitömer FA, owing to Hg retention by chars and anhydrite. The Hg and Cl concentrations of char samples from FAs of both power plants indicate that Hg and especially Cl concentrations are much higher than those in the FCs.

First Page

18

Last Page

31

DOI

10.4177/CCGP-D-18-00011.1

Publication Date

1-1-2019

Recommended Citation

Karayiğit, Ali İhsan, zlem Yiğitler, Seda İerli, Xavier Querol, Maria Mastalerz, Rıza Grkem Oskay, and James C. Hower. 2019. “Mineralogy and Geochemistry of Feed Coals and Combustion Residues from Tunbilek and Seyitmer Coal-Fired Power Plants in Western Turkey.” Coal Combustion and Gasification Products 11 (1): 18–31. https://doi.org/10.4177/CCGP-D-18-00011.1.