Emission of trace toxic metals during pulverized fuel combustion of Czech coals

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dc.contributor.author Danihelka, Pavel
dc.contributor.author Volná, Zdeňka
dc.contributor.author Jones, Jenny M.
dc.contributor.author Williams, Alan
dc.date.accessioned 2006-10-24T14:44:50Z
dc.date.available 2006-10-24T14:44:50Z
dc.date.issued 2003
dc.identifier.citation International journal of energy research. 2003, vol. 27, issue 13, p. 1181-1203. en
dc.identifier.issn 0363-907X
dc.identifier.issn 1099-114X
dc.identifier.uri http://hdl.handle.net/10084/57362
dc.description.abstract A study of the trace elements emission (As, Se, Cd, Co, Cr, Cu, Zn, Hg, TI, Pb, Ni, Sn, Sb, V, Mn and Fe) from pulverized coal combustion has been made at six heating and power stations situated in the Czech Republic. The amount of chlorine in coal has considerable influence on volatilization of some elements such as Zn, Cu, Pb, Hg and TI, which is explained by the formation of thermodynamically stable compounds of these elements with chlorine. Generally, the affinities for Cl follows the order Tl > Cu > Zn > Pb > Co > Mn > Sn > Hg. The experimental data indicates enrichment of some of the trace toxic elements in the emissions (Cu, Zn, As, Se, Cd, Sit, Sb, Hg and Pb) and good agreement was obtained by thermodynamic equilibrium calculations with a few exceptions. In the case of Fe, Mn, Co, Cr and Sri calculated values are overestimated in the bottom ash and there are zero predicted amounts of these elements in the fly ash. In comparison, the results from experiments show up to 80% of these elements retained in fly ash. This implies that there exist additional steps leading to the enrichment by Fe, Mn, Co, Cr and Sn of small particles. Such mechanisms could include the ejection during devolatilization of small inorganic particles from the coal of bottom ash particles, or disintegration of the char containing these metals to small particles of fly ash. On the other hand, there are slightly overestimated or similar values of relative enrichment factors for As, V, Cu, Cd, Sb, TI and Pb in the fly ashes and zero predicted values for bottom ashes. Our experimental results show about 5% or less of these elements are retained in bottom ashes, so they probably remain in the bottom ash inside unburned parts of coal. en
dc.language.iso en en
dc.publisher Wiley en
dc.relation.ispartofseries International journal of energy research en
dc.relation.uri http://dx.doi.org/10.1002/er.942 en
dc.subject pulverized coal en
dc.subject combustion en
dc.subject equilibrium calculation en
dc.subject chlorine en
dc.subject toxic metals en
dc.title Emission of trace toxic metals during pulverized fuel combustion of Czech coals en
dc.type article en
dc.identifier.location Není ve fondu ÚK en
dc.identifier.doi 10.1002/er.942
dc.identifier.wos 000185820600003

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