Table 6 Elemental composition of reference feedstock
C
H
N
S
O
H/C
O/C
HHV
Coke
87.91
0.88
1.19
0.66
9.36
0.12
0.04
32.78
Coal
83.02
3.89
1.59
1.03
10.47
0.56
0.047
34.78
Lignite
67.8
5.2
0.8
0.8
25.4
0.92
0.14
32.51
Petroleum crude 1
79.5
14.8
3.5
0.1
2.1
2.23
0.01
45.47
Petroleum crude 2
87.1
11.5
0.1
0.5
0.8
1.58
0.003
44.09
Fig. 7 van Krevelen plot for biomass and hydrothermal products
Table 7 Gaseous product composition result of hydrothermal conversion from woody and algal
biomass (yield moles/kg biomass)
Feedstock
Temperature (
C)
H 2
CO
CH 4
CO 2
Pine sawdust
225
1.32
2.85
0.03
7.80
275
12.26
6.03
0.44
8.36
500
15.52
7.12
2.25
13.81
600
26.15
8.90
2.41
23.32
Enteromorpha prolifera
300
0.15
0.6
–
8.9
400
0.9
0.5
0.3
10.2
500
3.2
–
2.4
8.4
600
10.2
–
6.1
6.7
Hydrothermal Conversion of Biomass into Fuel and Fine Chemicals
219