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This paper examines and compares different aluminum reduction technologies found in the literature as alternatives to the current Hall-Heroult technology. The main inefficiencies in the current Hall-Heroult technology were identified and the advantages of the different proposed technologies over the Hall-Heroult technology were determined. The comparison between the different technologies, namely Hall-Heroult, wetted drained cathode, inert anode, and carbothermic, was based on energy anddoi:10.3390/su10041216 fatcat:26m7c4rujnefrju22oaot4z4ta