CCT Marine

The CCT® system is an active full-flow filter for engines operating on diesel fuel containing less than 50 ppm sulphur.
Particulate matter is virtually eliminated from the exhaust with a wall flow filter.
The filter is regenerated with catalytic combustion technology. The regeneration is fully automated and does not interfere with engine operation.

CCT (Catalytic Combustion Technology) developed by STT Emtec uses diesel fuel from the vehicle injected into the exhaust stream causing an exothermic reaction in the catalyst upstream of the filter. The released heat increases the temperature of the particulate filter, promoting the oxidation of soot collected in the filter media.

The system is suitable for all types of heavy-duty applications The CCT system guarantees that the filter is regenerated as often as needed.

CCT System Features

This CCT system ensures the required soot oxidation rate for reliable filter regeneration during normal operational conditions for every application. The main features of the CCT system are Transient control of injection parameters: mass flow, timing, and injection rate. Exceptional exhaust/fuel mixture achieved through fine atomization and fuel distribution

General functions

Heat is generated in the catalyst during the flameless exothermic reaction between oxygen and fuel. The catalyst is an efficient heat exchanger and the heat generated during the initial 30 seconds of regeneration will be absorbed by the catalyst. Once the catalyst is hot, the DPF starts to warm up and soot will start to oxidize.

As the exhaust gas temperature reaches 600°C (1 110° F) the reaction between soot and oxygen starts. The oxidation rate increases rapidly with temperature and at 650°C (1 200° F) a complete regeneration of the DPF will take approximately five minutes. This means that a small amount of fuel is consumed during the regeneration event. Depending on the duty cycle and operational conditions the time between regenerations will differ, which affects the fuel consumption of the system. Practical experience shows a low increase in fuel consumption and in any case less than one percent in most applications.

1. Control cabinet
2. Injection manifold
3: Fuel handling system
4. Backpressure sensor
5. Air compressor (optional)
6. Mixing unit (or optional igniter unit)
7. Distance pipe
8. Particulate filter
9. Injection nozzle
10 – 11. Backpressure sensor hoses
12 – 13. Temperature sensors

Mailing address: STT Emtec AB,
Box 46, 862 02 Njurunda
Tel: +46 60 64 10 40

Copyright © STT Emtec AB 2023

Visiting address: Njurundavägen 16,
862 40 Njurunda