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. 2022 May 31;8(6):749–755. doi: 10.1021/acscentsci.2c00329

Table 1. Input and Output Parameters from the Technoeconomic Analysis of Three Electrolyzers.

  HOR|CEM|HCO3 OER|BPM|HCO3 OER|AEM|CO2
Input Parameters
voltage (V) 2 4 3
CO2 utilization (%) 80 80 40
FECO (%) 80 80 100
j (mA cm–2) 500
gross cost of CO2 capture ($/ton) 50
installed capex cost ($/kW) 450
electricity ($/kWh) 0.03
H2 purchase price ($/kg) 1 N/A N/A
Output Parameters
cost of H2 ($M/yr) 2.61 0.00 0.00
electricity cost ($M/yr) 5.24 10.48 6.29
CO2 capture cost ($M/yr) 1.06 1.06 2.87
CO2 separation cost ($M/yr) 0.72 0.72 4.30
maintenance and water cost ($M/yr) 0.25 0.49 0.3
total opex ($M/yr) 9.88 12.75 13.75
total capex: electrolyzer + balance of plant ($M) 13.8 27.6 16.56
Revenue from Sale of CO at $0.60/kg ($M/yr) 21.90
profit 11.52 8.78 7.82
       
NPV 20 yearsa 48.96 23.7 28.08
a

The net present value (NPV) was calculated on the basis of a 20 year plant life, 10% interest rate, 38.9% income tax rate, 2.5% fixed operating cost, and a depreciation schedule based on the modified accelerated cost recovery system that was developed by the Department of Energy for water electrolyzer and hydrogen technologies.