Cristin-resultat-ID: 1125030
Sist endret: 26. mars 2014, 14:50
Resultat
Vitenskapelig foredrag
2014

Monitoring of Low Cell Voltage PFC Formation in 200 to 300 kA Aluminium Electrolysis Cells

Bidragsytere:
  • Henrik Åsheim
  • Thor Anders Aarhaug
  • Alain Marc C Ferber
  • Ole Sigmund Kjos og
  • Geir Martin Haarberg

Presentasjon

Navn på arrangementet: 7th KIFEE International Symposium on Environment, Energy and Materials
Sted: Kanbaikan, Doshisha University, Kyoto, Japan
Dato fra: 16. mars 2014
Dato til: 19. mars 2014

Arrangør:

Arrangørnavn: Kyoto International Forum for Environment and Energy (KIFEE)

Om resultatet

Vitenskapelig foredrag
Publiseringsår: 2014

Beskrivelse Beskrivelse

Tittel

Monitoring of Low Cell Voltage PFC Formation in 200 to 300 kA Aluminium Electrolysis Cells

Sammendrag

The existence of perfluorocarbons (PFCs) formed at low cell voltage has been documented for larger size alumimium electrolysis cells with relatively few point feeders and intermediate current density. It has been proposed that less uniformity in dissolved alumina for larger cells may elevate individual anode overvoltage sufficiently to produce PFC. Low cell voltage PFC formation was monitored after the dry scrubber on a train of 28 cells at a Norwegian smelter. For this work a fourier-transform infrared spectrometer was used. Equipped with a mercury cadmium telluride (MCT) detector and retrofitted with a 35 m / 11 l measurement cell it was possible to get the detection limit down in the low ppb range needed for this study. It was discovered that also small cell could emit PFC that was not directly related to the full anode effect. Low cell voltage PFC was found to be discrete emissions mostly in the form of CF4, however, the results indicate that C2F6 may also form outside the main anode effect. No numerical data for the contribution of low cell voltage emissions to the overall PFC was calculated, nonetheless, judging by the difference in intensity of the events it will be small for this particular smelter.

Bidragsytere

Henrik Åsheim

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet
Aktiv cristin-person

Thor Anders Aarhaug

  • Tilknyttet:
    Forfatter
    ved Norges teknisk-naturvitenskapelige universitet

Alain Marc C Ferber

  • Tilknyttet:
    Forfatter
    ved Smart Sensor Systems ved SINTEF AS

Ole Sigmund Kjos

  • Tilknyttet:
    Forfatter
    ved Metallproduksjon og prosessering ved SINTEF AS

Geir Martin Haarberg

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet
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