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Table 2 Summary of key parameters

From: Influence of corn oil recovery on life-cycle greenhouse gas emissions of corn ethanol and corn oil biodiesel

Parameter Value Unit Data source
Corn agriculture
 Corn farming energy 0.40 MJ/kg corn [27]
Fertilizer usage
 N 17 g/kg corn [27]
 P2O5 5.7 g/kg corn [27]
 K2O 5.9 g/kg corn [27]
Ethanol production
 Ethanol yield 0.42 L/kg corn [13]
 DGS yield (bone-dry) 0.27 kg/kg corn [13]
 Corn oil yield 0.01 kg/kg corn [13]
 Total energy consumption 7.4 MJ/L EtOH [13]
 Natural gas 6.7 MJ/L EtOH [13]
 Electricity 0.20 kwh/L [13]
 Energy for corn oil recovery 14 kJ/L EtOH [13, 20]
 Energy for distillation and purification 1.1 MJ/L EtOH [13, 20]
 Energy for DGS drying 2.1 MJ/L EtOH [13, 20]
DGS displacement ratio
 Corn 0.75 kg/kg [22]
 Soybean meal 0.32 kg/kg [22]
 Urea 0.02 kg/kg [22]
Corn oil biodiesel production
 Corn oil biodiesel yield 0.96 kg/kg [36]
Corn oil biodiesel energy consumption  
 Natural gas 0.90 MJ/kg biodiesel [36]
 Electricity 0.04 kWh/kg biodiesel [36]