Journal
TOPICS IN CATALYSIS
Volume 60, Issue 3-5, Pages 209-213Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-016-0599-6
Keywords
DPNR; Simultaneous NOx and soot removal; NOx storage reduction; Ru-Ba/Al2O3; Ag-Ba/Al2O3; Pt-Ba/Al2O3
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Funding
- MIUR (Futuro in ricerca, FIRB, Project SOLYST)
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Silver- and ruthenium-based materials are herein investigated for the simultaneous removal of particulate matter (soot) and NOx and their behaviour is compared with that of a model Pt-Ba/Al2O3 catalyst. The catalytic activity for diesel soot combustion, in loose contact conditions, is studied by means of TPO (temperature programmed oxidation) while NOx removal is investigated through NOx Storage-Reduction cycles (SRC), performed both in the presence and in the absence of soot. Both the Ag- and Ru-based formulations result active in the soot oxidation, more than the traditional Pt-containing DPNR catalyst. Also, the Ru-based sample shows remarkable performances in the DeNO(x)-DeSoot activity, although its activity in the reduction step of the stored NOx still needs further improvements.
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