Boosting of Soot Combustion on Alkaline Mn/ZrO2 Nanostructures

An important decrease in the soot combustion temperature was observed by employing potassium and manganese on ZrO 2 as support; significantly boosted soot combustion was obtained with the K/ZrO 2 and Mn–K/ZrO 2 catalysts for T 50 at 295 and 240 °C, respectively. The enhanced catalytic activity by us...

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Bibliographic Details
Published in:Topics in catalysis 2020-08, Vol.63 (5-6), p.481-491
Main Authors: Camposeco, R., Castillo, S., Nava, N., Zanella, R.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic activity
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Combustion temperature
Deactivation
Industrial Chemistry/Chemical Engineering
Lattice vacancies
Low temperature
Manganese
Original Paper
Pharmacy
Physical Chemistry
Potassium
Soot
Zirconium dioxide
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Summary:An important decrease in the soot combustion temperature was observed by employing potassium and manganese on ZrO 2 as support; significantly boosted soot combustion was obtained with the K/ZrO 2 and Mn–K/ZrO 2 catalysts for T 50 at 295 and 240 °C, respectively. The enhanced catalytic activity by using the Mn–K/ZrO 2 catalyst could be attributed to the alkaline metal ion, which improved the catalyst/soot contact. XPS results revealed the presence of surface vacancies, where the addition of manganese improved the lattice oxygen and concentration of OH groups on the Mn–K/ZrO 2 catalyst at low temperatures; the presence of surface vacancies was facilitated by the interaction between potassium and manganese. The Mn–K/ZrO 2 catalyst showed resistance to deactivation for five cycles.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-020-01224-z