Dipl. Ing. Matthias Mayerhofer Technische Universität München ...

Results and Discussion 59
7.3.1. Effect of reaction Temperature and Space Velocity for iron based catalysts
Iron based catalysts:
The three different reaction temperatures investigated were 750°C-800°C-860°C.The results obtained
from the experiment verify the Le Chatelier’s principle. It is clear in Figure 30 that tar decomposition
is favored as temperature increases, which in agreement with the steam reforming
equations, as they are endothermic.
Conversion of tar (%)
80
70
60
50
40
30
20
10
0
750 800 860
Figure 30: Conversion of known tar compounds-Effect of Temperature
Equally, the higher the residence tine, the more time is available for the reactions to occur, so the
conversion of the tar is higher. As seen in Figure 31, the conversion of the tar drops significantly
when the space velocity increases.
Conversion of tar (%)
60
50
40
30
20
10
0
Temperature (⁰C)
4500 6500 8500 10000
Space Velocity (1/h)
Figure 31: Conversion tar - Effect of SV