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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Perfluorocarbon Generation and Emissions from Industrial Processes
Presentation Title New Approach for Quantification of Perfluorocarbons Resulting from High Voltage Anode Effects
Author(s) Lukas Dion, Simon Gaboury, László Istvan Kiss, Sándor Poncsák, Charles-Luc Lagacé
On-Site Speaker (Planned) Lukas Dion
Abstract Scope Since 2002, an increasing gap between the declared quantity of perfluorocarbons (PFC) generated by human activities and the atmospheric measurements has been observed; forcing the industry to re-examine the quantification methodology to find the root cause of this inconsistency. Current methodologies 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 this methodology, other approaches, including non-linear models, were used to estimate the emissions of PFC for shorter periods (weekly, daily, and individually). Gas monitoring was performed in different smelters and the efficiency of these methods was evaluated and discussed. The potential benefits and inconvenience 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.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

An Estimation of PFC Emission by Rare Earth Electrolysis
Attributing PFC Emissions to Different Industries: How Bottom-up Trends Can Complicate Top-down Analyses
Challenges in Estimating Global CF4 and C2F6 Emissions
Conditions and Mechanisms of Gas Emissions from Didymium Electrolysis and its Process Control
Evaluation of Time Consistency when Quantifying Emissions of Perfluorocarbons Resulting from Low Voltage Anode Effects
Fluorinated Gas Production: Underestimated Source of PFCs?
Low Voltage PFC Measurements and Potential Alternative to Reduce Them at Alcoa Smelters
Methodologies to Measure Greenhouse Gas (GHG) Emissions from Industrial Processes and Determine the GHG Emission Factors
New Algorithm for Calculating CF4 Emissions from High Voltage Anode Effects
New Approach for Quantification of Perfluorocarbons Resulting from High Voltage Anode Effects
Perfluorocarbon Formation during Rare Earth Electrolysis
PFC Emission Reduction in the Semiconductor Industry
PFC Evolution Characteristics during Aluminium and Rare Earth Electrolysis
PFCs from the Chinese Aluminium Sector – Challenges in Emissions Accounting and Further Characteristics
Updated Factors for Calculating PFC Emissions from Primary Aluminum Production
Validation of Online Monitoring of PFC by QCL with FTIR Spectroscopy

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