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Title: CuO, K<sub>2</sub>O and V<sub>2</sub>O<sub>5</sub> supported on ceria-titania: Synthesis, characterization and application for diesel soot combustion
Authors: Raj, K Joseph Antony
Viswanathan, B
Keywords: Diesel soot oxidation
Catalytic combustion
Mixed oxides
Issue Date: Apr-2010
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>9</sup> B01J21/00
Abstract: Diesel soot oxidation with CuO/V<sub>2</sub>O<sub>5</sub>/K<sub>2</sub>O/CeO<sub>2</sub>-TiO<sub>2</sub> catalyst samples has been studied. Mixtures of the catalyst with diesel soot lower the oxidation temperature from 601 to 427°C. TG/DTA studies of soot oxidation show that K-Cu-V modification improves the low temperature activity in air. Sample B with 12.5 % K<sub>2</sub>O has been found to be most active with peak activity at 427 °C. The activity further improved on incorporation of K-Cu-V, due to the mobility of potassium on melting. Chemical interactions between the K<sub>2</sub>O and titania result in formation of potassium titanate. In addition, the XRD patterns obtained for samples C and D loaded with higher concentrations of potassium show the formation of solid solutions with the oxides of Ce, K and V. Nevertheless, the variation of potassium content has a limited effect on soot ignition temperature. The catalyst with 12.5 wt. % of K<sub>2</sub>O, 7.5 wt. % of V<sub>2</sub>O<sub>5</sub> and 2 wt.% of CuO exhibits complete combustion at <i style="">T</i><sub>max</sub><i style=""> </i>= 427 °C.
Description: 401-406
Appears in Collections:IJC-A Vol.49A(04) [April 2010]

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