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. 2021 Nov 30;60(49):17862–17880. doi: 10.1021/acs.iecr.1c03592

Table 1. Capital Costs of Water Electrolyzers, Chlor-Alkali Process, and Aluminum Smelters.

parameter unit AEC SOEC chlor-alkali aluminum
cell voltage V 2.0 1.5 3.0 4.5
CD mA/cm2 600 850 500 1000
power kW/m2 12 13 15 45
CAPEX $/kW 650 1,250 2,000 2,500
CAPEX $/m2 7,800 15,938 30,000 112,500