Catalyzed Gasoline Particulate Filter (cGPF)
Particulate matter is removed from the exhaust by physical filtration using a honeycomb structure similar to an emission catalyst substrate but with the channels blocked at alternate ends resulting in enhance filtration efficiency. Also, the catalytic coating provides TWC activity and simultaneously converts CO, HC, and NOx.
2 NO + 2 CO → N2 + 2 CO2
2 CO + O2 → 2 CO2
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O