PM0.1 emissions during diesel trap regeneration.
A nanostructured spinel-type oxide catalyst (CoCr2O4) prepared by solution combustion synthesis was developed and deposited over a SiC wall-flow trap for diesel particulate removal. Bench tests proved that, after soot loading, the developed trap enables a faster and more complete regeneration at 550 degrees C than a commercial Pt-catalyst based trap or a noncatalyzed trap. On the other hand, secondary nanoparticle emission occurs during the fast regeneration promoted by the CoCr2O4-catalyzed trap. This is a likely consequence of oxidative fragmentation of the trapped soot agglomerates. This problem can be resolved by performing a "mild" regeneration at lower temperatures (e.g., 450 degrees C).
Cauda
E
E
Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
Hernandez
S
S
Fino
D
D
Saracco
G
G
Specchia
V
V
D000393:Air Pollutants; D002384:Catalysis; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D001335:Vehicle Emissions; D014961:X-Ray Diffraction
D000393:Air Pollutants; D001335:Vehicle Emissions