Rio Tinto and Alcoa announce world’s first carbon-free aluminum smelting process; Apple assist; Elysis JV to commercialize
Green Car Congress
MAY 11, 2018
The conventional Hall–Héroult process (invented in 1886) for smelting aluminum involves dissolving alumina (Al 2 O 3 ) in molten cryolite, and electrolyzing the molten salt bath, typically in a purpose-built cell with carbon electrodes. Oxygen from the alumina combines with carbon from the anode to produce mostly carbon dioxide.
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