|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Perfluorocarbon Generation and Emissions from Industrial Processes
||Attributing PFC Emissions to Different Industries: How Bottom-up Trends Can Complicate Top-down Analyses
||Deborah Ottinger, Stephanie Bogle
|On-Site Speaker (Planned)
Efforts to reconcile the PFC emissions inferred from atmospheric measurements and those reported using inventory methods have focused on electronics manufacturing and aluminum production. These efforts have sometimes relied on characteristic ratios of CF4 and C2F6 emissions from each industry. Previous research has attributed changes in the C2F6/CF4 ratio in inferred emissions to changes in the share of total PFC emissions contributed by each industry. However, the continuing replacement of C2F6 with NF3 in the electronics industry is currently changing the typical C2F6/CF4 ratio in that industry, complicating attribution efforts. The authors will show that the C2F6/CF4 ratio in emissions reported to the USEPA by semiconductor manufacturers has declined significantly over the past 15 years. The authors will also show similar trends in the PFC emissions reported by countries that are major electronics manufacturers. This demonstrates that understanding industry-specific emissions trends is necessary to correctly interpret atmospheric trends.
||Planned: Light Metals