Kohler SFGLD480 Operation & Maintenance Manual page 143

PRODUCT INFORMATION INDEX DATE
Dep. 2
IC-C-D-40-003e A
May 2012
OXIDATIVE CATALYTIC CONVERTERS
O&M_2.002211.810_A_10_2016
The following diagram shows the overall trend as regards the degree of conversion of the catalytic converter for
the different contaminants according to the exhaust gas temperature at the catalytic converter inlet.
Fig.2 Reduction efficiencies according to contaminant, based on the temperature inside the catalytic converter
These curves show general tendencies for oxidative catalytic converters. However, noble or transition metals that
make up the active stage, as well as the coating material and the preparation method determine conversion
results at different temperatures. Catalytic converters manufacturers do not usually supply the consumer with this
information, but show the conversion vs temperature curves for a specific catalyst. Another important factor is
the influence of the spatial speed of exhaust gases in the catalytic converters. The higher the speed, the lower the
conversion is
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