Temperature programmed desorption as a tool for the identification of mercury fate in wet-desulphurization systems

In this study a thermal desorption procedure (HgTPD) was used to identify mercury species in samples of gypsum obtained from wet flue gas desulphurization plants (WFGD). Gypsum from industrial coal combustion power plants and gypsum from a laboratory device that simulates mercury retention in the WFGD process were studied. It was concluded that mercury sulphide (HgS) is the mercury species present in WFGD gypsums unless an additive is used. Mercury speciation in this kind of residue can contribute to a better understanding of the reaction and adsorption behaviour of mercury species in the WFGD process and provide a deeper knowledge of the environmental impact caused by the disposal or reuse of these Hg-containing residues.

Bibliographic Details

Main Authors:	Rumayor Villamil, Marta, Díaz Somoano, Mercedes, López Antón, María Antonia, Ochoa González, Raquel, Martínez Tarazona, María Rosa
Format:	artículo biblioteca
Language:	English
Published:	Elsevier 2015-02
Subjects:	Mercury speciation, Wet-FGD, Gypsum, Mercury fate, HgTPD,
Online Access:	http://hdl.handle.net/10261/111837
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