Technologies
-> Diesel Particulate
Filters -> The CCRT® system
The CCRT® system
The CCRT® system is a
CRT® system, but with a catalytic
coating also applied to the DPF.
The oxidation catalyst removes CO and
HC and oxidises some of the NO in the exhaust gasses
to NO2. This NO2 then reacts
with the PM trapped in the filter, producing NO and
CO2. Some of the NO is then reoxidised
to NO2 in the filter, which then reacts
with more trapped PM. This enables the system to regenerate
in applications with very low exhaust gas temperatures
or low NOx:PM ratios in the exhaust gases.
CCRT® system performance
The emissions reduction performance of a CCRT®
system is the same as or even slightly better than
a CRT® system. Its major advantage
is in its wider range of operating conditions.
Operating conditions
The CCRT® system offers all the
advantages of a CRT® system but is
able to operate in applications that have exhaust
temperatures too low for a CRT® system.
It has been verified by the US EPA for applications
that have temperatures >210°C for 40% of the
operating time. It is also able to operate on engines
with a NOx:PM ratio that is insufficient for a standard
CRT® system.
Typical applications:
Truck and
Bus
Non-road
Mobile Machinery
Cars, Vans and Light
Trucks
Related products:
CRT®
systems
SCRT®
systems – a CRT® system working
with SCR to give CO, HC, PM and NOx control
NAC + DPF
– integrated diesel particulate filter and NOx
adsorber catalyst systems giving CO, HC, PM and NOx
control
EGRT®
system (US retrofit only) – a CRT®
system working with exhaust gas recirculation to give
CO, HC, PM and NOx control
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