Agilent Technologies 8355 Sulfur User Manual page 40

3
System Description
40
Upper hydrogen
Burner
Base heater
Figure 6 SCD flows
For the NCD, the burner provides two heated zones, one at the
base and one farther up the assembly. In the burner base region,
the column effluent mixes with hydrogen and air at high
temperature. The resulting hydrogen flame combusts the
effluent. Low concentration components will burn to form the
usual combustion products, including NO
containing nitrogen. The products are drawn upward through a
quartz tube and catalyst, where a high temperature will convert
NO into NO.
2
Figure 7 shows the flow paths for the NCD burner assembly.
To detector
Ceramic tube,
upper
Ceramic tube,
lower
Oxidizer
Lower hydrogen
Column
for compounds
2
SCD and NCD User Manual