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Particulate emissions from electrolysis cells

Gaertner, Heiko; Ratvik, Arne Petter; Aarhaug, Thor Anders
Journal article, Peer reviewed
Accepted version
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URI
http://hdl.handle.net/11250/2581361
Date
2011
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  • Institutt for materialteknologi [2407]
  • Publikasjoner fra CRIStin - NTNU [34985]
Original version
Light Metals. 2011, 345-350.   10.1002/9781118061992.ch62
Abstract
In the dry cleaning of the exhaust gas from the aluminium cells impurities are accumulated in the finer fractions of secondary alumina from the dry scrubbers. The present work describes new methods for the determination of dust composition, aiming at increasing the understanding of the effect of cell operation on the amount and the composition of dust in the fume. New and advanced analysis methods are used to characterize a broad specter of emissions. An Electrical Low Pressure Impactor is used to sample and analyze the dust from the cells. The equipment enables real-time particle size distribution analysis of 12 particle classes in the range 30 nm - 10 µm. The size classified samples are analyzed by means of SEM/EDS and XRD to determine the characteristic chemical composition of the different fractions. Understanding the evolution, evaporation, and condensation of particulates in the cell emissions under different operational conditions may facilitate new standards for environmental friendly and energy efficient high amperage electrolysis cells.
Publisher
Wiley
Journal
Light Metals

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