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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Perfluorocarbon Generation and Emissions from Industrial Processes
Presentation Title Evaluation of Time Consistency when Quantifying Emissions of Perfluorocarbons Resulting from Low Voltage Anode Effects
Author(s) Lukas Dion, Pernelle Nunez, Simon Gaboury, David Sydney Wong, Alexey Viktorovich Spirin
On-Site Speaker (Planned) Lukas Dion
Abstract Scope Low voltage anode effects (LVAE) have been observed in numerous smelters since early 2010s. Such events are now known to generate perfluorocarbons (PFC) emissions over time and no methodology currently exists to adequately quantify such emissions. A novel methodology has been developed to quantify the annual LVAE emissions for smelters based on measurement data from multiple in-situ gas measurement campaigns by Marks & Nunez. However, there is currently no estimate of the contribution of those emissions from previous years. This paper investigates the potential effects of adopting this approach and applying it to historic emissions inventories of PFCs. Based on historical data supplied by aluminium smelters, the total respective PFC emissions resulting from high and low voltage anode effects were calculated using Tier 2 methodologies, allowing evaluation of the impact of LVAE on the total amount of PFC reported. Time-consistency challenges arising from this new approach are explored and discussed.
Proceedings Inclusion? Planned: Light Metals


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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