Etude de la combustion de gaz de synthèse issus d'un processus de ...

Chapter 4
Pressure (bar)
7
6
5
4
3
2
1
0
φ=1.2
φ=1.0
φ=0.8
φ=0.6
0 25 50 75 100 125 150 175 200
Time (ms)
Figure 4.26 - Pressure versus time for updraft syngas-air mixture.
tel-00623090, version 1 - 13 Sep 2011
Pressure (bar)
Pressure (bar)
7
6
5
4
3
2
1
0
φ=1.0
φ=1.2
φ=0.8
φ=0.6
0 25 50 75 100 125 150 175 200
Time (ms)
Figure 4.27- Pressure versus time for downdraft syngas-air mixture.
7
6
5
4
3
2
1
0
φ=1.0
φ=0.8
φ=0.6
0 100 200 300 400 500 600 700 800
Time (ms)
Figure 4.28 – Pressure versus time for fluidized bed syngas-air mixture.
In all cases of typical syngas-air mixtures presented herein, stoichiometric mixture is
shows the best performance in terms of pressure peak. Rich mixtures (φ=1.2), not
shown for fluidized bed case due to unsuccessful ignition, shows to be the faster ones
for updraft and downdraft cases. Very lean mixtures (φ=0.6) shows, in all cases, to
depart remarkably from the stoichiometric mixture. In the case of fluidized bed syngas
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