Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Résumé

The methodology used for accounting PFC emissions resulting from aluminum smelting have been developed nearly 20 years ago. There has not been any update on this methodology since 2008 and recently published research demonstrated possible avenues for improvements resulting in increased accuracy. Current models used in the aluminum industry quantify PFC emissions linearly, based on the monthly average polarized anode effect duration for entire pot lines. To potentially increase the precision of the quantification process, other approaches, composed of non-linear models, were used to estimate the emissions of PFC during individual high voltage anode effects. Gas monitoring was performed in different smelters and the efficiency of these methods was evaluated and discussed. The potential benefits and drawbacks related to those quantification methodologies were evaluated by extrapolating results for significant operation periods. Additionally, with this analysis, it was possible to assure time-consistency between the original quantification methodology and the new approaches explored in this paper.