Ranking Renewable and Fossil Fuels on Global Warming Potential Using Respiratory Quotient Concept

Table 2

Properties of different fuels reported on mass basis.

Fuel	C; Mass%	H; Mass%	S; Mass%	N; Mass%	O; Mass%	HHV measured (kJ/kg)	HHV, Boie (kJ/kg)	Ref.
Gaseous fuels
Methane	75	25	0	0	0	55,500	55,426	[17]
Ethane	80	20	0	0	0	51,100	51,373	[17]
Propane	81.8	18.2	0	0	0	50,300	49,914	[17]
Ethylene	80	20	0	0	0	50,300	51,373	[17]
Acetylene	92.3	7.7	0	0	0	49,900	41,402	[17]
Liquid fuels
Gasoline (C8H18)	84.2	15.8	0	0	0	48,500	47,968	[22]
Diesel (C12H23)	86.2	13.8	0	0	0	45,000	46,347	[22]
Biodiesel	77.2	12.2	0	0	10.6	35,900	40,147	[22]
Ethanol	52.1	13.2	0	0	34.7	29,700	29,603	[17]
Methanol	37.5	12.6	0	0	49.9	23,900	22,168	[17]
Free fatty acid from peanut oil soap stock	80.2	12.2	0.12	0.5	7	39,800	41,645	[22]
Bio oil (wood pyrolysis)	56	6.25	0	0.1	37.5	17,500	22,801	[23]
Heavy oil	85	11	0	0.3	1	40,000	42,579	[23]
Canola oil	80.2	10.9	0.004	0.14	8.62	40,200	39,927	[22]
Solid fuels
WYO coal	46.5	2.73	0.27	0.66	11.3	18,200	18,347	[24]
TXL coal	37.2	2.12	0.61	0.68	9.61	14,300	14,577	[24]
Hardwood (mesquite)	43.6	4.98	0.03	0.62	33.6	16,700	17,434	[25]
Softwood (Juniper)	49.3	5.7	0.01	0.28	37	19,000	19,874	[25]
Fibrous (rice straw)	41.8	4.63	0.08	0.7	36.6	16,300	16,068	[17]
Animal based (LAPCDB)	35.2	3.7	0.43	1.93	18.6	12,800	14,780	[26]

Estimated from the enthalpy of formation data. Renewable fuels. Multiply HHV in kJ/kg by 0.43 to obtain BTU/lb.