An efficient ammonium chloride roasting approach to separating salt from the electrolytic carbon in molten carbonate

Selective CO2 Electroreduction with Enhanced Oxygen Evolution Efficiency in Affordable Borate-Mediated Molten Electrolyte

“…In addition, attributed to the low water solubility of Li 2 CO 3 , CaCO 3 , and BaCO 3 , acid leaching treatment is conventionally used to separate pure carbon products from adhered frozen electrolyte, which can release extra CO 2 by decomposition of carbonate (2H + + CO 3 2– → CO 2 (g) + H 2 O) and therefore decrease the overall CO 2 conversion efficiency. Very recently, some promising joint efforts have been made to achieve a sustainable separation process, such as high-temperature press filtration, ultrasound-assisted carbonation, and an ammonium chloride roasting approach, where the adhered electrolytes can be recycled and reused. However, a more sustainable separation strategy with a reduced carbon footprint is still urgently needed.…”