Journal
TOPICS IN CATALYSIS
Volume 30-1, Issue 1-4, Pages 161-168Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1023/B:TOCA.0000029745.87107.b8
Keywords
NOx reduction; lean-burn; reducing agents; H-2; CO; C3H6; C3H8; Pt/BaO/Al2O3 catalyst
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In this investigation, a comparative study for a NOx storage catalytic system was performed focusing on the parameters that affect the reduction by using different reductants (H-2, CO, C3H6 and C3H8) and different temperatures (350, 250 and 150 degreesC), for a Pt/BaO/Al2O3 catalyst. Transient experiments show that H-2 and CO are highly efficient reductants compared to C3H6 which is somewhat less efficient. H-2 shows a significant reduction effect at relatively low temperature (150 degreesC) but with a low storage capacity. We find that C3H8 does not show any NOx reduction ability for NOx stored in Pt/BaO/Al2O3 at any of the temperatures. The formation of ammonia and nitrous oxide is also discussed.
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