Trace elements (TEs) content in coal, industrial hydrated lime, and bottom ashes from coal combustion and coal with hydrated lime additions were studied in this article. The favorable effect of hydrated lime (HL) addition to coal on TEs retention in ashes was reported for As, B, Co, Li, Mo, and V. However, at the same time, less Cu, Ni, Pb, and Sr were retained in the ash. An experimental studies results was supplemented with thermodynamic equilibrium calculations performed in Factsage software. Based on calculations, it has been shown that addition of HL to coal: (i) reduces formation of liquid slag phase containing, among others, TEs in the following form: As2O3(l), CoO(l), Cu2O(l), NiO(l), PbO(l) and ZnO(l); (ii) favors retaining As, B, Mo, and V in ash, as a result of stable components formation: Ca3(AsO4)2(s), Ca3(BO3)2(s), CaMoO4(s) and Ca3(VO4)2(s). Interestingly, most of the arsenic in the ash was trapped in Ba3(AsO4)2(s). [ABSTRACT FROM AUTHOR]
Copyright of Energy Sources Part A: Recovery, Utilization & Environmental Effects is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
