Honeycomb Ceramic Cordierite diesel Particulate Filter

● Low Thermal Expansion Coefficient – Excellent thermal shock resistance, suitable for frequent regeneration conditions. 

● Lightweight Design – 30% lighter than SiC-DPF, reducing vehicle load.

● Cost Advantage – Raw material costs only 1/3 to 1/2 of those for silicon carbide (SiC). 

● Integrated Catalytic Coating – Can be coated with precious metals (e.g., platinum, palladium) or rare earth elements (e.g., cerium) to enable passive regeneration below 500°C. 

● Typical Applications: Light-duty diesel vehicles (e.g., SUVs, pickup trucks), off-road machinery (agricultural/construction equipment), and models compliant with China V/Euro V emission standards. 

Limitations Compared to SiC-DPF:

● Lower Maximum Temperature Tolerance – Only around 1,300°C (versus SiC’s 1,700°C). 

● Lower Thermal Conductivity – Relies on external heat sources for active regeneration assistance.

A DPF is installed between an engine and a muffler to remove suspended particulate matter (SPM) from diesel engine exhaust gas.

The working principle of the particulate trap: By alternately blocking both ends of the pores of the honeycomb porous ceramic, the ceramic wall is used to filter and remove PM.