On the activity and stability of Pt-K/Al2O3 LNT catalysts for diesel soot and NOx abatement

R. Matarrese, L. Castoldi, N. Artioli, E. Finocchio, G. Busca, L. Lietti*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

DPNR Pt-K/Al2O3 catalyst has been studied for the simultaneous removal of soot and NOx, in the presence of both water and carbon dioxide. In particular, the effect of soot on the NOx storage activity and on the stability of Pt-K/Al2O3 catalyst has been addressed. It has been found that: (i) the presence of soot decreases the NOx storage activity at any temperature in the range 250-350°C; (ii) the stability of the adsorbed species is lower in the presence of soot; (iii) nitrates ad-species directly interact with soot and participate to the soot combustion; (iv) aged catalyst shows a lower storage capacity and a lower soot oxidation activity attributed to loss of K-active species.

Original languageEnglish
Pages (from-to)783-791
Number of pages9
JournalApplied Catalysis B: Environmental
Volume144
Early online date21 Aug 2013
DOIs
Publication statusPublished - Jan 2014
Externally publishedYes

Keywords

  • Diesel particulate NO reduction
  • DPNR catalysts
  • LNT catalysts
  • Simultaneous NO and soot removal
  • Soot oxidation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

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