Environmental Engineering Reference
In-Depth Information
Table 8 Performance of gasi
cation process
Test no.
Air flow
rate
(Nm
3
/h)
Producer
gas yield
(Nm
3
/h)
Producer gas composition (vol%)
Lower
heating
value
(MJ/Nm
3
)
Cold gas
ef
ciency
(%)
CO
CH
4
H
2
CO
2
1
73.48
123.99
20.51
0.26
9.27
5.86
3.55
62.86
2
74.89
123.99
18.39
0.89
13.1
8.21
3.99
62.91
3
74.89
139.89
19.86
0.42
10.63
6.96
3.69
87.13
4
101.74
211.42
20.59
0.37
8.92
7.61
3.56
93.95
5
90.43
206.65
20.55
0
7.81
5.93
3.29
84.87
6
84.78
211.42
15.97
0.77
10.84
10.83
3.4
63.68
7
62.17
127.17
15.04
1.49
10.36
9.53
3.49
65.73
8
96.08
214.60
14.97
0.2
11.58
11.08
3.16
68.34
9
96.08
-
15.95
0.93
9.64
8.38
3.31
-
10
96.08
17.44
1.03
11.9
10.6
3.78
-
-
11
73.48
127.17
15.08
1.44
14.22
11.43
3.93
76.27
12
73.48
127.17
14.22
0.41
11.37
7.91
3.12
67.58
13
73.48
127.17
16.00
0.63
14.49
8.05
3.77
80.19
14
73.48
130.35
14.01
0.82
11.08
9.23
3.21
68.19
15
73.48
155.78
14.59
0.81
11.40
7.71
3.32
76.82
16
73.48
143.07
13.40
0.81
12.28
8.25
3.28
86.56
17
73.48
149.42
15.47
1.08
8.20
6.52
3.14
80.41
18
73.48
127.17
13.46
1.14
10.99
7.03
3.26
80.08
Max.
101.74
214.60
20.59
1.49
14.49
11.43
3.99
93.95
Min.
62.17
123.99
13.40
0.00
7.81
5.86
3.12
62.86
Remark The producer gas yield for test no. 9 and 10 was not measured
engine operation a few amount of particulates, soot and tars entrained in producer
gas were agglomerated and accumulated on the surface of engine compartments, for
example air cooler, as shown in Fig.
6
. However, it did not play an important role in
the engine performance.
After accumulated 200 operating hours test, the viscosity of lubricating oil was
slightly reduced from 80.80 to 76.06 mm
2
/s at 40
C. The decrease in viscosity can
result from the dilution of fuel oil or the cracking of lubrication oil due to the higher
temperature operation (Udonne
2011
). The substantial decrease in viscosity can
lead to a decrease in
°
film thickness on the surfaces of engine parts and, conse-
quently, engine
s wear. However, the small decrease in viscosity from this study
did not affect the engine performance.
'
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