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

Chuan Shi, Zhao Shun Zhang, Mark Crocker, Li Xu, Chun Yan Wang, Chaktong Au, Ai Min Zhu

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

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.

Original languageEnglish
Pages (from-to)96-103
Number of pages8
JournalCatalysis Today
Volume211
DOIs
StatePublished - Aug 1 2013

Bibliographical note

Funding Information:
The work was supported by the National Natural Foundation of China (nos. 20573014 , 20673016 and 21073024 ), Natural Science Foundation of Liaoning Province (no. 201102034 ) and by the Program for New Century Excellent Talents in University ( NCET-07-0136 ), as well as by the Fundamental Research Funds for the Central Universities (no. DUT12LK23 ).

Keywords

  • H-plasma
  • LNT catalyst
  • LaMnFeO
  • NO storage
  • Non-thermal plasma
  • Perovskite

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)

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