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

Table 4

Emergy analysis table for rapeseed-based biodiesel.

Stage	Type	Item	Data	Reference	Transformity (sej/unit)	Reference	Solar emergy (sej)
Plantation and reap	R	Sunlight (J)	0.52𝐸+13	Calculated	1.00𝐸+00	[5]	0.52𝐸+13
		Rain geopotential (J)	0.61𝐸+09	Calculated	4.70𝐸+04	[5]	2.87𝐸+13
		Rain chemical potential (J)	0.60𝐸+10	Calculated	3.05𝐸+04	[5]	1.83𝐸+14
		Wind (J)	1.01𝐸+10	Calculated	1.50𝐸+03	[6]	1.52𝐸+13
	N	Topsoil loss	1.36𝐸+09	Calculated	7.40𝐸+04	[5]	1.01𝐸+14
	F	Water (kg)	556010	Statistics	4.65𝐸+08	[6]	0.26𝐸+15
		Nitrogen (kg)	236.82	Statistics	2.40𝐸+13	[5]	5.69𝐸+15
		Biocide trifluralin (kg)	1.03	Statistics	1.48𝐸+13	[5]	1.53𝐸+13
		Pesticide pirimicarb (kg)	1.03	Statistics	1.48𝐸+13	[5]	1.53𝐸+13
		Diesel (kg)	127.5	Estimated	3.04𝐸+12	[5]	3.88𝐸+14
		Human labor (h)	200	Estimated	1.1𝐸+12	[5]	2.2𝐸+14
		Rapeseed seed ($)	24.32	Statistics	1.18𝐸+13	[8]	0.29𝐸+15
Rapeseed oil production	F	Crude oil (J)	0.45𝐸+10 J	Statistics	5.4	[9]	2.43𝐸+14
		Electricity (J)	939.66𝐸+06	Statistics	3.36𝐸+05	[8]	3.14𝐸+14
Biodiesel production	F	MeOH (kg)	216.23	Statistics	1.76𝐸+12	[8]	3.81𝐸+14
		NaOH (kg)	8.03	Statistics	6.38𝐸+12	[8]	5.13𝐸+13
		H2O (kg)	1019.36	Statistics	4.65𝐸+08	[6]	4.74𝐸+11
		H3PO4 (kg)	6.28	Statistics	2.65𝐸+12	[9]	1.81𝐸+13
		Electricity (J)	2.36𝐸+08	Statistics	3.36𝐸+05	[8]	7.94𝐸+13
		Human labor (h)	800	Estimated	1.1𝐸+12	[5]	8.8𝐸+14