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Effects for Coexistent Reductant to NOx Adsorption and Desorption of the NOx Storage Catalyst  

Lee, Choon-Hee (Graduate School of Mechanical Engineering, Chonnam National University)
Choi, Byung-Chul (School of Mechanical System Engineering, Chonnam National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.5, 2005 , pp. 181-187 More about this Journal
Abstract
The behavior of fox adsorption and desorption of the NOx storage catalyst supported on Ba additive were studied by the TPA/TPD experiments and reactivity tests. Applying the transient responses and NOx TPA/TPD test by CLD were effective methods to analyze the characteristics of the NOx storage catalyst. NOx variation of the NOx storage catalyst in the lean air/fuel conditions according to temperature was dominated by NOx adsorption and desorption rather than catalytic reduction. The presence of reductants in the lean mixture promoted the NOx desorption at the $500^{\circ}C$ higher temperature. The temperatures for maximum NOx conversion with CH4 and $C_3H_6$ as a rich spike reductant appear around $500^{\circ}C\;and\; 400^{\circ}C$ respectively.
Keywords
NOx storage catalyst; TPA; TPD; NOx; Adsorption; Desorption; Reductant;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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