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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Perfluorocarbon Generation and Emissions from Industrial Processes
Presentation Title An Estimation of PFC Emission by Rare Earth Electrolysis
Author(s) Hanno Vogel, Bernd Friedrich
On-Site Speaker (Planned) Hanno Vogel
Abstract Scope Molten salt electrolysis with oxide feed is the reduction step in the process chain of most rare earth metals. It was industrialized in China in the 1980s. The research and development has been concentrated in China since then as well. The production of neodymium and praseodymium increased with the rapid development of NdFeB magnets from 2000 on. An intensive literature search has been conducted in Chinese media to gather data about the size, technology, location and perfluorocarbon (PFC) emission of the process. Consequently, the electrolysis of neodymium was analyzed under various conditions in laboratory scale with continuous FTIR off-gas measurement. Based on these findings combined with an estimate of the metal production, the annual amount of PFC emission is calculated in three scenarios. This paper wants to act as an incentive for further research and for collecting real industry data of PFC emission from rare earth smelting.
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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