|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Perfluorocarbon Generation and Emissions from Industrial Processes
||New Algorithm for Calculating CF4 Emissions from High Voltage Anode Effects
||Jerry Marks, Pernelle Nunez
|On-Site Speaker (Planned)
Current Tier 2 algorithms calculate CF4 emission factors based on average anode effect minutes or average millivolts Overvoltage per cell day. Both the “slope” and “overvoltage” algorithms are based on the assumption that CF4 emission rates remain constant for anode effect durations ranging from less than one second to more than 1000 seconds. Detailed analysis of PFC measurements made over the past decade has shown conclusively that CF4 emission rates decrease rapidly with increasing reported anode effect duration. This study analyzes measurement data from individual anode effects from more than 2000 individual anode effects from more than 30 different measurements to develop a new exponential algorithm that better reflects changes in emission rate with anode effect duration. The exponential calculation should prove to be more robust resulting in more accurate calculation of PFC emissions than previous models.
||Planned: Light Metals