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

Table 2 Summary of key parameters

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]

ISSN: 2731-3654