2016 | OriginalPaper | Buchkapitel
The Competitive Adsorption of HF and SO2 on Smelter Grade Alumina
verfasst von : Neal R. Dando, Stephen J. Lindsay
Erschienen in: Light Metals 2016
Verlag: Springer International Publishing
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Smelter grade alumina (SGA) is the preferred agent for recovering HF from aluminum smelter ventilation gas streams since the alumina also serves as feed to the electrolysis cells, thereby allowing return of the recovered fluoride to the process. This alumina-based recovery loop includes sulfur, since SO2 evolved from cells is in fact adsorbed on the SGA. This paper explores the competitive adsorption/reaction behavior of SO2 and HF and on smelter grade alumina as well as the impact of increasing HF exposure on the surface area and porosimetry of SGA.