Partitioning behavior of trace elements during pilot-scale fluidized bed combustion of high ash content lignite

Date

2006-10-11

Author

Selçuk, Nevin
Gogebakan, Zuhal

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This study describes the partitioning of 20 trace elements (As, B, Ba, Cd, Co, Cr, Cu, Hg, Li, Mn, Mo, Ni, P, Pb, Sb, Se, Sn, TI, V, Zn) and eight major and minor elements (Al, Ca, Fe, K, Mg, Na, Si, Ti) during the combustion of high ash content lignite. The experiments were carried out in the 0.3 MW, Middle East Technical University (METU) atmospheric bubbling fluidized bed combustor (ABFBC) test rig with and without limestone addition. Inert bed material utilized in the experiments was bed ash obtained previously from the combustion of the same lignite without limestone addition in the same test rig. Concentrations of trace elements in coal, limestone, bottom ash, cyclone ash and filter ash were determined by inductively coupled plasma optical emission spectroscopy (ICP-OES). Partitioning of major and minor elements are influenced by the ash split between the bottom ash and fly ash and that the major proportion of most of the trace elements (As, Ba, Cr, Hg, Li, Mo, Ni, Sn, V, Zn) are recovered in fly ash. Limestone addition shifts the partitioning of Ba, Cr, Mo, Ni, Sn, V, Zn from bottom ash to fly ash.

Subject Keywords

Lignite, Major and minor elements, Trace elements, Partitioning, Bubbling fluidized bed combustion

URI

https://hdl.handle.net/11511/32244

Journal

JOURNAL OF HAZARDOUS MATERIALS

DOI

https://doi.org/10.1016/j.jhazmat.2006.05.011

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

N. Selçuk and Z. Gogebakan, “Partitioning behavior of trace elements during pilot-scale fluidized bed combustion of high ash content lignite,” JOURNAL OF HAZARDOUS MATERIALS, pp. 1698–1703, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32244.