Non-thermal plasma enhanced NSR performance over Pt/M/Ba/Al2O3 (M = Mn, Co, Cu) catalysts

Zhifeng Bai, Zhaoshun Zhang, Bingbing Chen, Qi Zhao, Mark Crocker, Chuan Shi

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

To improve the NOxstorage capacity (NSC) of lean NOxtrap (LNT) catalysts of the Pt/BaO/Al2O3type, the catalyst was doped with redox active transition metals of Mn, Co, or Cu, respectively. Due to differences in the chemical states of the doped metals, the catalysts exhibited different catalytic behaviors. Co and Mn doped catalysts showed improved NO to NO2oxidation ability, and therefore enhanced NOxstorage capacities, which led to the increased cycle averaged NOxconversions as compared to a Pt/Ba/Al2O3reference. However, being limited by NOxreduction in rich phase, the NOxconversions were still poor at low temperatures (<250 °C). By employing an H2-plasma in rich phase to assist NOxreduction, NOxconversions were greatly enhanced especially for low temperatures (⩽250 °C). The best properties were achieved over Pt/Co/Ba/Al2O3catalyst which exhibited NOxconversions higher than 80% in the whole temperature range (150–350 °C) and best SO2resistance abilities.

Original languageEnglish
Pages (from-to)688-699
Number of pages12
JournalChemical Engineering Journal
Volume314
DOIs
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

  • NOstorage-reduction
  • Non-thermal plasma
  • Transition metal oxide

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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