Table 2.

Electrolysis efficiency, energy density, and profitability index of various CO2RR products

ProductElectrolysis efficiency, %Energy density at STP, MJ L−1Energy density at elevated pressure, MJ L−1Profitability index, ¢ kW-h−1
Hydrogen74.10.0103.74 (at 50 MPa)9.95
CO73.30.0122.69 (at 25 MPa)1.91
Formic acid65.85.56131.56
Methanol62.815.7893.77
Methane57.70.0339.68 (at 25 MPa)0.99
Ethanol59.121.1586.74
Ethene61.00.05520.15 (at 25 MPa)6.15
1-Propanol58.224.63614.83