Emergy Analysis and Sustainability Efficiency Analysis of Different Crop-Based Biodiesel in Life Cycle Perspective

Table 3

Emergy analysis table for soybean-based biodiesel.

Stage	Type	Item	Data	Reference	Transformity (sej/unit)	Reference	Solar emergy (sej)
Plantation and reap	R	Sunlight (J)	1.17𝐸+13	Calculated	1.00𝐸+00	[5]	1.17𝐸+13
		Rain geopotential (J)	1.37𝐸+09	Calculated	4.70𝐸+04	[5]	6.44𝐸+13
		Rain chemical potential (J)	1.36𝐸+10	Calculated	3.05𝐸+04	[5]	4.15𝐸+14
		Wind (J)	2.29𝐸+10	Calculated	1.50𝐸+03	[6]	3.44𝐸+13
	N	Topsoil loss	3.08𝐸+09	Calculated	7.40𝐸+04	[5]	2.28𝐸+14
	F	Water (kg)	5033790	Statistics	4.65𝐸+08	[6]	2.34𝐸+15
		Nitrogen (kg)	93.22	Statistics	2.40𝐸+13	[5]	2.24𝐸+15
		Biocide trifluralin (kg)	2.33	Statistics	1.48𝐸+13	[5]	3.45𝐸+13
		Pesticide pirimicarb (kg)	2.33	Statistics	1.48𝐸+13	[5]	3.45𝐸+13
		Pesticides dicofol (kg)	1.17	Statistics	1.48𝐸+13	[5]	1.73𝐸+13
		Diesel (kg)	212.5	Estimated	3.04𝐸+12	[7]	6.46𝐸+14
		Human labor (h)	200	Estimated	1.1𝐸+12	[5]	2.2𝐸+14
		Soybean seed ($)	108.56	Statistics	1.18𝐸+13	[8]	1.28𝐸+15
Soybean oil production	F	Crude oil (J)	1.05𝐸+10 J	Statistics	5.4𝐸+04	[9]	5.67𝐸+14
		Electricity (J)	1245.86𝐸+06	Statistics	3.36𝐸+05	[8]	4.19𝐸+14
Biodiesel production	F	MeOH (kg)	217.90	Statistics	1.76𝐸+12	[8]	3.84𝐸+14
		NaOH (kg)	8.16	Statistics	6.38𝐸+12	[8]	5.21𝐸+13
		H2O (kg)	1018.41	Statistics	4.65𝐸+08	[6]	4.74𝐸+11
		H3PO4 (kg)	6.06	Statistics	2.65𝐸+12	[9]	1.61𝐸+13
		Electricity (J)	251.69𝐸+06	Statistics	3.36𝐸+05	[8]	8.46𝐸+13
		Human labor (h)	800	Estimated	1.1𝐸+12	[5]	8.8𝐸+14