Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Non-thermal plasma-assisted NOx storage and reduction on a LaMn0.9Fe0.1O3 perovskite catalyst

Language

English

Abstract

Based on its high NOx storage capacity (NSC), a study of the properties of LaMn0.9Fe0.1O3 in NOx storage-reduction catalysis was undertaken. The microstructure of the LaMn 0.9Fe0.1O3 catalyst was characterized by XRD, XPS and H2-TPR techniques and compared with that of LaMnO 3. The role of Fe doping in LaMnO3 on the perovskite structure and on NOx storage capacity was clarified. Though the LaMn0.9Fe0.1O3 perovskite has high NSC values even at relatively low temperature (<300 C), it shows much lower activity during lean-rich cycling compared with a traditional Pt/BaO/Al2O 3 catalyst, indicating that regeneration of stored NOx is the rate limiting step for the perovskite catalyst. By employing an H 2-plasma in the rich phase to assist reduction of the stored NO x, the NOx conversion is greatly improved, especially at low temperature. The results of the present study show that by combining the high NOx storage capacity of the perovskite in the lean phase with non-thermal plasma-assisted activation of the reductant in the rich phase, high NOx conversion can be obtained at low temperature. © 2013 Elsevier B.V. All rights reserved.

Keywords

H2-plasma, LaMn0.9Fe0.1O3, LNT catalyst, NOx storage, Non-thermal plasma, Perovskite

Publication Date

2013

Source Publication Title

Catalysis Today

Volume

211

Start Page

96

End Page

103

Publisher

Elsevier

DOI

10.1016/j.cattod.2013.03.008

ISSN (print)

09205861

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