The most effective after treatment systems to reduce soot emissions from diesel engines are based on soot filtration and catalytic combustion. Catalysts with specific activity towards soot oxidation (Cu/V/K/Cl) and with effective microwave absorption properties (Fe, Ni) were compared. The catalysts were supported on both powder and foam filters (SiC, Al 2O 3), to study the influence of microwave absorption properties of the support on the soot combustion. The soot combustion rate was evaluated by temperature programmed tests performed in a single mode cavity equipped with a (800 w, 2.45 GHz) magnetron as power source, a PID controller, and a thermocouple properly shielded. The outlet gas was analyzed by continuous analyzers for O 2, CO, and CO 2 concentrations. The presence of catalysts allowed to achieve lower soot ignition temperature, higher combustion rate and CO 2 selectivity with respect to uncatalytic oxidation. Moreover, it reduced the energy required to complete soot combustion. This is an abstract of a paper presented at the 7th World Congress of Chemical Engineering (Glasgow 7/10-14/2005).
Microwaves supported continuous regeneration of diesel particulate catalytic filter / Vincenzo, Palma; Russo, Paola; Giuseppa, Matarazzo; Paolo, Ciambelli. - (2005), pp. 236-236. (Intervento presentato al convegno 7th World Congress of Chemical Engineering, GLASGOW2005, incorporating the 5th European Congress of Chemical Engineering tenutosi a Glasgow; United Kingdom nel 10 July 2005 through 14 July 2005).
Microwaves supported continuous regeneration of diesel particulate catalytic filter
RUSSO, PAOLA;
2005
Abstract
The most effective after treatment systems to reduce soot emissions from diesel engines are based on soot filtration and catalytic combustion. Catalysts with specific activity towards soot oxidation (Cu/V/K/Cl) and with effective microwave absorption properties (Fe, Ni) were compared. The catalysts were supported on both powder and foam filters (SiC, Al 2O 3), to study the influence of microwave absorption properties of the support on the soot combustion. The soot combustion rate was evaluated by temperature programmed tests performed in a single mode cavity equipped with a (800 w, 2.45 GHz) magnetron as power source, a PID controller, and a thermocouple properly shielded. The outlet gas was analyzed by continuous analyzers for O 2, CO, and CO 2 concentrations. The presence of catalysts allowed to achieve lower soot ignition temperature, higher combustion rate and CO 2 selectivity with respect to uncatalytic oxidation. Moreover, it reduced the energy required to complete soot combustion. This is an abstract of a paper presented at the 7th World Congress of Chemical Engineering (Glasgow 7/10-14/2005).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
