Molten salt electrolysis and room temperature ionic liquid electrochemical processes for refining rare earth metals: Environmental and economic performance comparison

This study investigates the environmental and economic performance of molten salt electrolysis and room temperature ionic liquid electrochemical processes for refining rare earth metals. The objective is to provide a comprehensive comparison between these two advanced technologies in terms of their sustainability and overall cost-effectiveness. A detailed analysis was conducted, including life cycle assessments and economic evaluations, to assess key factors such as energy consumption, emissions, and production costs associated with each method. Results indicate that while both processes have their advantages, molten salt electrolysis shows a more favorable environmental profile with lower greenhouse gas emissions compared to ionic liquid electrochemical processes. However, the economic feasibility of molten salt electrolysis is significantly influenced by the fluctuating prices of energy and materials. This research highlights the importance of selecting appropriate technological approaches for the refining of rare earth metals, taking into account both environmental sustainability and economic viability, thereby guiding future investments and policies in the sector.