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OVERALL KINETICS FOR THE CATALYTIC IGNITION OF ETHANE-AIR MIXTURES ON PLATINUM
A typical recording of Ustd is given in Figure 5.
U std /V
5
4
3
2
1
0
0 2 4 6 8 10
time /s
5.66% C2H6-air
p 0 =100 kPa; T w =487 K
Figure 5. Recorded Ustd versus time diagram
Using equation (8) and the similar diagram recorded in air (without fuel)
at the same wire temperature and total pressure, a kinetic diagram given in
Figure 1 can be obtained. The wire temperature is calculated according to
literature recommendations as [17]:
x − 2.
64 i
T Di
⋅[
]
1.
64
9
w = 273.
15 + D0
+ ∑
i=
1
where x is the ratio between the wire resistance at temperature Tw and at
273.15 K and D0, Dj are constants given in literature [17]. All the other
details were given elsewhere [7-10].
ACKNOWLEDGMENTS
The authors acknowledge the financial support of CNCSIS through
the Contract nr.38/2007 for the Project ID_1008.
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