Diesel Particulate Filter (DPF)
Diesel particulate filter is mainly used in the diesel engine tail gas purifying system to solve the air pollution problem. It adopts structure of honeycomb, and sets up independent opening and blocking up passages in both ends and the waste gas enters from one open end, then goes through the porous beehive wall, and finally discharges from adjoining passage. The carbon particulates are left over on passage wall because they are too big to pass through wall hole and won't be discharged to air.
Diesel particulate filter can effectively remove black smoke (PM e.g.: Hydrocarbons, soot) from diesel engine exhaust emission, usually DPF removes 90% or more of the soot.
Advantage of diesel particulate filter
1. Low pressure drop.
2. Low coefficient of thermal expansion.
3. Good thermal shock resistance.
4. High temperature resistance, good resistance to chemical corrosion.
5. High porosity, pore size distribution uniform, high filter specific surface area.
6. Long-term durability performance.
7. High particulate trapping efficiency, suitable for all kinds of regeneration.
Diesel particulate filter is suitable for exhaust gas purification of various kinds of diesel vehicles and ships. We can produce different materials of DPF: cordierite diesel particulate filter and silicon carbide diesel particulate filter.
If you want know more things about the DPF, please contact us directly, I will do my best to service for you.
Cordierite Diesel Particulate Filter(DPF)
The most common filter is made of cordierite. Cordierite filters provide excellent filtration efficiency, are relatively inexpensive (comparison with Sic wall flow filter). The major drawback is that cordierite has a relatively low melting point.
Physical & Chemical Properties of Cordierite Diesel Particulate Filter
| Property | Technical Index | ||
| 100/17 | 200/12 | ||
Properties | Cell density | 100CPSI | 200CPSI |
| 15.5 CPSCM | 31 CPSCM | ||
| Wall thickness | 0.017 Inch | 0.012 Inch | |
| 0.432 mm | 0.305 mm | ||
| Open frontal area | 34.5% | 34.5% | |
| Geometric surface area | 33.3 Inch²/L | 47 Inch²/L | |
| 1.31m²/L | 1.85m²/L | ||
| Hydraulic diameter | 0.083 Inch | 0.059 Inch | |
| 2.11mm | 1.49 mm | ||
| Modulus of rupture | 350 CPSI/CPSCM | 300 CPSI/CPSCM | |
| Apparent porosity | >=50% | >=50% | |
| Coefficient of thermal expansion (20-800ºC) | <=1.2×10-6 /ºC | <=1.2×10-6 /ºC | |
| Compression strength in normal temperature | >=10Mpa | >=10Mpa | |
| Mean pore size | 13 Micron | 13 Micron | |
| Melting temperature | >=1400ºC | >=1400ºC | |
| Soot-filtration efficiency | >=95% | >=95% | |
| Chemical Composition | SiO2 | 50.9±1% | |
| Al2O3 | 35.2±1% | ||
| MgO | 13.9±1% | ||
| Size | CPSI | Volume(L) |
| φ118*152.4 | 100/200 | 1.67 |
| φ118*254 | 100/200 | 2.78 |
| φ127*152.4 | 100/200 | 1.93 |
| φ127*180 | 100/200 | 2.3 |
| φ127*254 | 100/200 | 3.22 |
| φ144*152.4 | 100/200 | 2.49 |
| φ144*203 | 100/200 | 3.31 |
| φ144*254 | 100/200 | 4.44 |
| φ144*305 | 100/200 | 4.97 |
| φ190*152.4 | 100/200 | 4.32 |
| φ190*203 | 100/200 | 5.76 |
| φ190*305 | 100/200 | 8.65 |
| φ240*240 | 100/200 | 10.9 |
| φ240*305 | 100/200 | 13.8 |
| φ250*305 | 100/200 | 14.97 |
| φ267*254 | 100/200 | 14.22 |
| φ267*267 | 100/200 | 14.95 |
| φ267*305 | 100/200 | 17.07 |
| φ286*305 | 100/200 | 19.6 |
| φ286*355 | 100/200 | 22.8 |
| φ305*305 | 100/200 | 22.28 |
| φ330*381 | 100/200 | 32.59 |
Silicon Carbide Diesel Particulate Filter(DPF)
Silicon carbide diesel particulate filters (Sic wall flow filters) have a higher melting point and filtration efficiency (can be up to 95%) than cordierite, they are usually more expensive than cordierite wall flow filters.
Physical & Chemical Properties of Cordierite Diesel Particulate Filter
| Item | Units | Technical Index |
| Sic content | % | >90 |
| Cell density | CPSI | 200 |
| Wall thickness | mm | 0.35-0.41 |
| Cell length | mm | 1.2-1.45 |
| Apparent porosity | % | 42-60 |
| Median pore size | m | 12-20 |
| Transverse compression strength | Mpa | >2.3 |
| Vertical compression strength | Mpa | 10-18 |
| Coefficient of thermal expansion (40-800ºC) | 10-6 /ºC | 4.3-4.4 |
| Thermal Conductivity (500ºC) | W/mK | 14-22 |
| Capture rate | % | >95 |
| Bulk density | Kg/L | 0.8 |
| Filter area | m²/L | 0.75 |
| Softening temperature | ºC | 1400 |
Spec of Sic DPF
| Cell density 50CPSI 100CPSI 150CPSI 200CPSI | |||
| Shape | Size(mm) | Size(inch) | Volume (L) |
| Round | Φ144*152.4 | Dia.5.66*6 | 2.48 |
| Φ144*203 | Dia.5.66*8 | 3.30 | |
| Φ144*254 | Dia.5.66*10 | 4.14 | |
| Φ144*305 | Dia.5.66*12 | 4.96 | |
| Φ170*254 | Dia.6.69*10 | 5.76 | |
| Φ190*152.4 | Dia.7.5*6 | 4.32 | |
| Φ190*203 | Dia.7.5*8 | 5.75 | |
| Φ190*254 | Dia.7.5*10 | 7.20 | |
| Φ228*152.4 | Dia.9*6 | 6.22 | |
| Φ228*254 | Dia.9*10 | 10.37 | |
| Φ228*305 | Dia.9*12 | 12.45 | |
| Φ240*240 | Dia.9.5*9.5 | 10.85 | |
| Φ240*254 | Dia.9.5*10 | 11.48 | |
| Φ240*305 | Dia.9.5*12 | 13.79 | |
| Φ267*305 | Dia.10.5*12 | 17.07 | |
| Φ286*152.4 | Dia.11.26*6 | 9.79 | |
| Φ286*305 | Dia.11.26*12 | 19.58 | |
| Oval | 191.8*95.8*152.4 | 7.55*3.77*6 | 2.24 |
| Race track | 145*118.4*152.4 | 5.7*4.66*6 | 2.15 |
| We can be customized according to customer requirements | |||
Package 
