The effect of NO and H2O on the activity of a Cu/V/K/Cl/Ti based catalytic filter in the combustion of soot generated in the flame of a gas-oil burner has been investigated. Temperature programmed oxidation (TPO) of soot collected on a ceramic filter supporting the Cu/V/K/Cl/Ti catalyst was performed with a flow micro-reactor in the absence and in the presence of NO and H2O in the reactant gas. The presence of NO and H2O resulted in a substantial increase of the rate of carbon combustion, and also affected the selectivity (CO2/CO ratio). The enhanced activity is mainly due to carbon oxidation by NO formed by NO oxidation on the same catalyst. TPO test performed after sulphation of the catalytic filter evidenced a marked loss of activity. However, in the presence of NO and H2O the activity of soot oxidation was mostly preserved. (C) 2000 Elsevier Science B.V. All rights reserved.
The role of NO in the regeneration of catalytic ceramic filters for soot removal from exhaust gases / P., Ciambelli; V., Palma; Russo, Paola; S., Vaccaro. - In: CATALYSIS TODAY. - ISSN 0920-5861. - 60:1(2000), pp. 43-49. (Intervento presentato al convegno 4th European Congress on Catalysis (EUROPACAT-IV) tenutosi a RIMINI, ITALY nel SEP 05-10, 1999) [10.1016/s0920-5861(00)00315-1].
The role of NO in the regeneration of catalytic ceramic filters for soot removal from exhaust gases
RUSSO, PAOLA;
2000
Abstract
The effect of NO and H2O on the activity of a Cu/V/K/Cl/Ti based catalytic filter in the combustion of soot generated in the flame of a gas-oil burner has been investigated. Temperature programmed oxidation (TPO) of soot collected on a ceramic filter supporting the Cu/V/K/Cl/Ti catalyst was performed with a flow micro-reactor in the absence and in the presence of NO and H2O in the reactant gas. The presence of NO and H2O resulted in a substantial increase of the rate of carbon combustion, and also affected the selectivity (CO2/CO ratio). The enhanced activity is mainly due to carbon oxidation by NO formed by NO oxidation on the same catalyst. TPO test performed after sulphation of the catalytic filter evidenced a marked loss of activity. However, in the presence of NO and H2O the activity of soot oxidation was mostly preserved. (C) 2000 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
