Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 14, Issue 6, Pages 841-846Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2008.06.007
Keywords
Pt/BaO/Al2O3; Cobalt; Rhodium; NSR; In situ DRIFT; Spillover
Funding
- Korean Ministry of Commerce, Industry and Energy [2006-02-1920000-3-020]
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Effect of cobalt and rhodium promoter on NOx storage and reduction (NSR) kinetics was investigated over Pt/BaO/Al2O3. Kinetics of 2% cobalt loading over Pt/BaO/Al2O3 demonstrated highest NOx uptake during lean cycle, while reduction efficiency during rich cycle appeared most poor. In contrast to this, rhodium showed suppressing effect of NOx uptake during lean cycle and demonstrated an enhanced effect for the higher efficiency of NOx reduction during rich cycle. DRIFT study for NO., uptake and regeneration confirmed formation of surface BaNOx, from the band at 1300 cm(-1) and formation of bulk BaNOx from the band at 1330 cm(-1). (C) 2008 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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