Element behaviour during combustion in coal-fired Orhaneli power plant, Bursa-Turkey
Esenlik, S. (Hacettepe University. Department of Geological Engineering)
Alastuey, Andrés (Centro Superior de Investigaciones Científicas. Institute of Earth Sciences “Jaume Almera”)
Karayigit, A. I. (Hacettepe University. Department of Geological Engineering)
Bulut, Y. (Hacettepe University. Department of Geological Engineering)
Querol Carceller, Xavier (Centro Superior de Investigaciones Científicas. Institute of Earth Sciences “Jaume Almera”)
Font, O. (Centro Superior de Investigaciones Científicas. Institute of Earth Sciences “Jaume Almera”)

Date: 2006
Abstract: This study focuses on element behaviour during combustion in the Orhaneli thermal power plant (a 210 MW unit, Bursa-Turkey). A total of 51 samples, feed coals (FCs), fly ashes (FAs) and bottom ashes (BAs), which were systematically collected over an eight-week period, have been analysed for major, minor and trace elements (Al, Ca, Fe, K, Mg, Na, S, As, B, Ba, Be, Bi, Cd, Co, Cr, Cs, Cu, Ga, Ge, Hf, Hg, Li, Mn, Mo, Nb, Ni, P, Pb, Rb, Sb, Sc, Se, Sn, Sr, Ta, Th, Ti, Tl, U, V, W, Y, Zn, Zr and REEs). This study shows that FCs on an airdried basis have high moisture (av. 9%), high volatile matter (av. 33%), very high ash yield (av. 53%), relatively high sulfur content (av. 2. 14%) and low gross calorific value (av. 1775 kcal/kg). Proximate analyses of combustion residues imply that BAs have higher contents of unburned carbonaceous matter than FAs. Mean values of trace element concentrations in FCs fall within the ranges of most world coals, except for Cr, Cs, Ni and U which occur in concentrations slightly higher than those determined for most of world coals. Some elements such as S, Hg, As, B, Bi, Cd, Cs, Ge, K, Pb, Rb, Sb, Se, Sn, Tl, and Zn are indicating enrichments in FAs. The remaining elements investigated in this study have no clear segregation between FAs and BAs. The mass balance calculations point to Ca content of feed coal controlling the partitioning of elements in this power plant, producing a high removal efficiency for highly volatile elements such as Hg, B and Se, and a high retention of As, Bi, Cd, Cs, Ge, Pb, Rb, Sb, Sn, Tl and Zn in FAs. However, the high enrichment in trace elements of FAs can increase the hazardous potential of this coal by-product.
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Language: Anglès.
Document: article ; recerca ; publishedVersion
Subject: Trace elements ; Feed coal ; Fly ash ; Bottom ash ; Orhaneli-Turkey
Published in: Geologica acta, Vol. 4, Núm. 4 (2006) , p. 439-449, ISSN 1696-5728

Adreça alternativa: https://www.raco.cat/index.php/GeologicaActa/article/view/82413
DOI: 10.1344/105.000000345

11 p, 523.0 KB

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 Record created 2012-01-30, last modified 2018-07-14

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