Chemistry Reference
In-Depth Information
As an example the similarity representation of measurements using geometrical
similar positive columns as the active zone of a flow reactor is given [17]. Figure 4.13
shows the experimental arrangement.
The transition of
E
/
n
into a constant value at higher pressures is shown in
Figure 4.14 for CO
2
discharges. It is a rather general experience that the value of
E
/
n
in electrical discharges controlled by bulk processes depends only weakly on current
and pressure. In chemically active plasmas with many channels for generation and
GC-/MS device
Tube 1
I
= 55 cm;
r
= 2 cm
Gas inlet
Tube 2
Tube 3
I
= 21 cm;
r
= 1 cm
I
r
= 13.5 cm;
= 0.4 cm
Vacuum system
FIGURE 4.13
Schematic diagram of the positive column flow reactor with geometrical
similar discharge tubes.
200
400
800
1000
1600
2600
3300
3800
Parameter:
p
[Pa]
150
Td
100
E
/
n
50
0
Wm
1
0
100
200
300
400
500
P
/
l
FIGURE 4.14
Reduced field strength
E
/
n
in the positive column of CO
2
discharges
(
r
=
0.4cm).
