Environmental Engineering Reference
In-Depth Information
taBle 10.2
transportation Fuel Properties Including specific energies and co
2
Production
a
B
c
d
e
F
G
h
I
density
(kg/m
3
)
energy unit
mass (mJ/kg)
energy
unit volume (-)
co
2
/Fuel
(g
co
2
/g
Fuel
)
co
2
/energy
(g
co
2
/mJ)
octane
number
h
(-)
cetane
number (-)
application
Fuel
h/c (-)
o/c (-)
Spark ignition
(liquid fuels)
Gasoline
a
1.87
0.00
760
44.0
1.00
3.17
72
87-93
14-20
Methanol
4.00
1.00
792
20.0
0.47
1.37
69
99
12
Ethanol
3.00
0.50
785
26.9
0.63
1.91
71
98
14
Butanol
b
2.50
0.25
810
32.0
0.78
2.37
74
96
15
Compression
ignition
Diesel
1.86
0.00
827
43.2
1.07
3.17
73
33-54
40-50
Biodiesel
c
1.83
0.11
885
37.3
0.99
2.83
76
15-31
52-58
FT diesel
1.74
0.01
761
44.6
1.01
3.14
70
-
70-90
DME
d
3.00
0.50
668
28.4
0.57
1.91
67
-
55-60
Spark ignition
(gaseous fuels)
Methane
e
4.00
0.00
165
50.0
0.25
2.74
55
120
-
Natural gasf
f
3.80
0.00
185
45.0
0.25
2.78
62
130
Hydrogen
g
Inf
-
29
120.0
0.10
0.00
0
106
-
A
H/C ratio is the molar ratio of hydrogen to carbon atoms.
B
O/C ratio is the molar ratio of oxygen to carbon atoms.
C
Density is the mass of fuel per unit volume.
D
Energy content on a mass basis. Known as the heating value [e.g., lower heating value (LHV)] and is the quantity of energy contained per unit mass of
fuel.
(
Continued
)
