The effect of exhaust gas components on the performance of sulfated and unsulfated Cu/V/K/Cl/Ti based catalytic filters in soot combustion was studied. Soot produced by a gas-oil burner was first captured on ceramic filters supporting the catalyst, then burned off by temperature programmed oxidation in a flow microreactor with different reactant gas compositions, i.e., O 2, O 2-N 2, O 2-H 2O, and O 2-NO-H 2O in N 2. The catalytic filter significantly promoted the soot combustion in O 2-N 2 flow. The addition of NO or H 2O or both further increased the soot reactivity over the catalytic filter. At lower temperature, this increase was improved by the presence of NO, while at higher temperature by that of H 2O. However, such components had no effect on the uncatalyzed soot combustion. An exchange between chlorine and sulfur in the catalyst active species was due to severe sulfation of the catalytic filter. The catalyst was deactivated by the presence of sulfur oxides in the exhaust gases. Filter sulfation yielded a significant loss of catalyst activity. The enhancement of soot catalytic oxidation rate in the presence of NO may be due to carbon oxidation by NO 2, which was in turn generated by NO oxidation on the catalyst, while that in the presence of H 2O could be due to the catalytic activation of the steam gasification of carbon on similar catalyst. Original is an abstract.

Influence of exhaust gas components on the regeneration of catalytic ceramic filters for soot removal / P., Ciambelli; V., Palma; Russo, Paola. - B:B(2000), pp. 32-32. (Intervento presentato al convegno 28th International Symposium on Combustion tenutosi a Edinburgh; Scotland).

Influence of exhaust gas components on the regeneration of catalytic ceramic filters for soot removal

RUSSO, PAOLA
2000

Abstract

The effect of exhaust gas components on the performance of sulfated and unsulfated Cu/V/K/Cl/Ti based catalytic filters in soot combustion was studied. Soot produced by a gas-oil burner was first captured on ceramic filters supporting the catalyst, then burned off by temperature programmed oxidation in a flow microreactor with different reactant gas compositions, i.e., O 2, O 2-N 2, O 2-H 2O, and O 2-NO-H 2O in N 2. The catalytic filter significantly promoted the soot combustion in O 2-N 2 flow. The addition of NO or H 2O or both further increased the soot reactivity over the catalytic filter. At lower temperature, this increase was improved by the presence of NO, while at higher temperature by that of H 2O. However, such components had no effect on the uncatalyzed soot combustion. An exchange between chlorine and sulfur in the catalyst active species was due to severe sulfation of the catalytic filter. The catalyst was deactivated by the presence of sulfur oxides in the exhaust gases. Filter sulfation yielded a significant loss of catalyst activity. The enhancement of soot catalytic oxidation rate in the presence of NO may be due to carbon oxidation by NO 2, which was in turn generated by NO oxidation on the catalyst, while that in the presence of H 2O could be due to the catalytic activation of the steam gasification of carbon on similar catalyst. Original is an abstract.
2000
28th International Symposium on Combustion
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Influence of exhaust gas components on the regeneration of catalytic ceramic filters for soot removal / P., Ciambelli; V., Palma; Russo, Paola. - B:B(2000), pp. 32-32. (Intervento presentato al convegno 28th International Symposium on Combustion tenutosi a Edinburgh; Scotland).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/509573
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