Volume 45, Issue 3 pp. 517-525
Research Article

A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity

Sunaina S. Patil

Sunaina S. Patil

National Institute of Technology Karnataka, Chemical Engineering Department, 575025 Surathkal, Mangalore, Karnataka, India

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Sahana Naik

Sahana Naik

National Institute of Technology Karnataka, Chemical Engineering Department, 575025 Surathkal, Mangalore, Karnataka, India

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Madhura D. Ramesh

Madhura D. Ramesh

National Institute of Technology Karnataka, Chemical Engineering Department, 575025 Surathkal, Mangalore, Karnataka, India

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Harshini Dasari

Harshini Dasari

Manipal Academy of Higher Education (MAHE), Manipal Institute of Technology, Chemical Engineering Department, 576104 Manipal, Udupi, Karnataka, India

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Hari Prasad Dasari

Corresponding Author

Hari Prasad Dasari

National Institute of Technology Karnataka, Chemical Engineering Department, 575025 Surathkal, Mangalore, Karnataka, India

Correspondence: Hari Prasad Dasari ([email protected]), National Institute of Technology Karnataka, Chemical Engineering Department, Surathkal, Mangalore, Karnataka, 575025, India.Search for more papers by this author
First published: 11 January 2022

Presented at the International Chemical Engineering Conference on “100 Glorious Years of Chemical Engineering & Technology”, Jalandhar, India, September 2021.

Abstract

Niobium-doped ceria catalysts were synthesized to study soot oxidation activity. X-Ray diffraction (XRD) and Raman analysis of the samples revealed the presence of a fluorite structure of CeO2 for all the doped samples. The T50 temperature of the pure CeO2 sample was more significant than that of bare soot. The high catalytic activity of the CeO2 catalyst can be attributed to the low crystallite size, high facet ratio, and the large Brunauer-Emmett-Teller (BET) surface area as compared to Nb-doped samples. The activation energy calculated by both Ozawa and KAS methods were found to be low for CeO2 when compared to Nb-doped samples. CeO2 resulted in better soot oxidation activity with low activation energy.

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