The effect of water and reductants on the release of nitrogen oxides stored on BaO/Al2O3

Noel W. Cant; Michael J. Patterson

doi:10.1023/A:1022129310511

The effect of water and reductants on the release of nitrogen oxides stored on BaO/Al₂O₃

Noel W. Cant^*, Michael J. Patterson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

59 Citations (Scopus)

Abstract

The effect of water and reductants (CO and H₂) on the decomposition of NO_x stored on BaO/Al₂O₃ at 300 °C has been investigated. Water eliminates the initial rapid total uptake of NO₂ but has little effect on the subsequent formation of nitrates that is accompanied by evolution of NO. Water hinders liberation of NO₂ and NO during temperature-programmed decomposition of stored NO_x. Both CO and H₂ lower the temperatures required for decomposition through reduction of NO₂ to NO and N₂ thus restricting NO₂ readsorption. The rate of reduction is lower with H₂ than with CO.

Original language	English
Pages (from-to)	153-157
Number of pages	5
Journal	Catalysis Letters
Volume	85
Issue number	3-4
DOIs	https://doi.org/10.1023/A:1022129310511
Publication status	Published - Feb 2003

Keywords

Aluminum oxide
Barium oxide
Decomposition of stored nitrate
NO storage catalysts
Reduction of stored nitrate

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abstract = "The effect of water and reductants (CO and H2) on the decomposition of NOx stored on BaO/Al2O3 at 300 °C has been investigated. Water eliminates the initial rapid total uptake of NO2 but has little effect on the subsequent formation of nitrates that is accompanied by evolution of NO. Water hinders liberation of NO2 and NO during temperature-programmed decomposition of stored NOx. Both CO and H2 lower the temperatures required for decomposition through reduction of NO2 to NO and N2 thus restricting NO2 readsorption. The rate of reduction is lower with H2 than with CO.",

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AB - The effect of water and reductants (CO and H2) on the decomposition of NOx stored on BaO/Al2O3 at 300 °C has been investigated. Water eliminates the initial rapid total uptake of NO2 but has little effect on the subsequent formation of nitrates that is accompanied by evolution of NO. Water hinders liberation of NO2 and NO during temperature-programmed decomposition of stored NOx. Both CO and H2 lower the temperatures required for decomposition through reduction of NO2 to NO and N2 thus restricting NO2 readsorption. The rate of reduction is lower with H2 than with CO.

KW - Aluminum oxide

KW - Barium oxide

KW - Decomposition of stored nitrate

KW - NO storage catalysts

KW - Reduction of stored nitrate

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The effect of water and reductants on the release of nitrogen oxides stored on BaO/Al₂O₃

Abstract

Keywords

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