|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||E-30: Influence of Atmosphere and Temperature on PAH Emission from Green Anode Paste
||Kamilla Arnesen, Thor Anders Aarhaug, Kristian Etienne Einarsrud, Gabriella Tranell
|On-Site Speaker (Planned)
The metallurgical industry emits, to a varying degree, polycyclic aromatic hydrocarbons (PAHs), a group of organic molecules consisting of two or more joined aromatic rings. These are primarily formed by incomplete combustion or pyrolysis of organic materials and are naturally present in carbon materials for Al-electrolysis anode production. To better control the off-gas treatment, learning how process parameters affect the formation and type of PAH is important. Laboratory scale experiments were performed using industrial green anode paste. Different temperatures (25 - 750 °C) and atmospheres were used to investigate their effect on the PAH emissions. Concentration and species distribution of PAH-16 was analyzed and compared to the existing PAH-16 in the green anode paste. Compared to inert atmosphere, adding 5 % oxygen, reduced the PAH-16 concentration by 55 %, from 65.6 to µg/ml to 29.3 µg/ml, and reduced further with 10 % oxygen.
||Characterization, Environmental Effects, Aluminum