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Catalytic Converter and Temperature
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Purification of Catalytic Converter
Oxygen adheres to catalytic
material : below 180°C
Catalytic converter has the normal function of
purification at a range of the temperature.
Because it has a weak point of decreasing of
the purification
continuous high temperature, it should keep
the temperature range of 400 to 500°C for
normal
becomes better according to the increase of
temperature
temperature. CO purification rate becomes
the best near the temperature of 450°C, and
NOx does so near the temperature of 400 to
500°C.
-
Adhesion of soluble organic fraction
(SOF) below 180°C
-
Purification of soluble organic fraction
(SOF) over 180°C
Chemical reaction formula
-
By catalytic action of two primary catalytic
converter, oxidation occurs in order to
decrease HC and CO.
Catalytic material supplies
each CO and HC with O2 for
their oxidation : above 180°C
2420-01
rate in the condition
condition.
HC
purification
in
the
normal
SOF(HC)+O2 → CO2+H2O
2CO+O2 → 2CO2
2C2H6+7O2 → 4CO2+6H20
Catalytic material conversion
process by DOC
03-5
of
rate
range
of
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