Enahncement of the reaction of nitric oxide and carbon monoxide by hydrogen and water over platinum and rhodium-containing catalysts

R. Dümpelmann; N. W. Cant; D. L. Trimm

doi:10.1016/S0167-2991(06)81424-2

Enahncement of the reaction of nitric oxide and carbon monoxide by hydrogen and water over platinum and rhodium-containing catalysts

R. Dümpelmann^*, N. W. Cant, D. L. Trimm

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

The addition of hydrogen or water to a stoichiometric mixture of CO and NO over supported platinum and rhodium catalysts can significantly increase the conversion of both NO and CO. Theselectivity of NO reduction is also affected in a remarkable manner. With Pt/Al ₂O ₃ at 210°C, for example, addition of, ≈900 ppm H ₂ increases the NO conversion from 6% to 48% and that of CO from 5% to 33%. The nitrogen atom of NO is converted quite selectively to NH ₃ while the oxygen atom forms CO ₂ rather than water. Addition of, ≈1400 ppm water also enhances both CO and NO conversion over Pt/Al ₂O ₃ but N ₂ rather than NH ₃ is the favoured product. Hydrogen and water also produce significant rate enhancements with Rh/Al ₂O ₃ and Rh/CeO ₂/Al ₂O ₃ but the product distributions are somewhat different from those with Pt/ Al ₂O ₃. Possible reasons for the enhanced activities and the observed selectivities are discussed.

Original language	English
Pages (from-to)	123-135
Number of pages	13
Journal	Studies in Surface Science and Catalysis
Volume	96
Issue number	C
DOIs	https://doi.org/10.1016/S0167-2991(06)81424-2
Publication status	Published - 1995

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title = "Enahncement of the reaction of nitric oxide and carbon monoxide by hydrogen and water over platinum and rhodium-containing catalysts",

abstract = "The addition of hydrogen or water to a stoichiometric mixture of CO and NO over supported platinum and rhodium catalysts can significantly increase the conversion of both NO and CO. Theselectivity of NO reduction is also affected in a remarkable manner. With Pt/Al 2O 3 at 210°C, for example, addition of, ≈900 ppm H 2 increases the NO conversion from 6% to 48% and that of CO from 5% to 33%. The nitrogen atom of NO is converted quite selectively to NH 3 while the oxygen atom forms CO 2 rather than water. Addition of, ≈1400 ppm water also enhances both CO and NO conversion over Pt/Al 2O 3 but N 2 rather than NH 3 is the favoured product. Hydrogen and water also produce significant rate enhancements with Rh/Al 2O 3 and Rh/CeO 2/Al 2O 3 but the product distributions are somewhat different from those with Pt/ Al 2O 3. Possible reasons for the enhanced activities and the observed selectivities are discussed.",

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T1 - Enahncement of the reaction of nitric oxide and carbon monoxide by hydrogen and water over platinum and rhodium-containing catalysts

AU - Dümpelmann, R.

AU - Cant, N. W.

AU - Trimm, D. L.

PY - 1995

Y1 - 1995

N2 - The addition of hydrogen or water to a stoichiometric mixture of CO and NO over supported platinum and rhodium catalysts can significantly increase the conversion of both NO and CO. Theselectivity of NO reduction is also affected in a remarkable manner. With Pt/Al 2O 3 at 210°C, for example, addition of, ≈900 ppm H 2 increases the NO conversion from 6% to 48% and that of CO from 5% to 33%. The nitrogen atom of NO is converted quite selectively to NH 3 while the oxygen atom forms CO 2 rather than water. Addition of, ≈1400 ppm water also enhances both CO and NO conversion over Pt/Al 2O 3 but N 2 rather than NH 3 is the favoured product. Hydrogen and water also produce significant rate enhancements with Rh/Al 2O 3 and Rh/CeO 2/Al 2O 3 but the product distributions are somewhat different from those with Pt/ Al 2O 3. Possible reasons for the enhanced activities and the observed selectivities are discussed.

AB - The addition of hydrogen or water to a stoichiometric mixture of CO and NO over supported platinum and rhodium catalysts can significantly increase the conversion of both NO and CO. Theselectivity of NO reduction is also affected in a remarkable manner. With Pt/Al 2O 3 at 210°C, for example, addition of, ≈900 ppm H 2 increases the NO conversion from 6% to 48% and that of CO from 5% to 33%. The nitrogen atom of NO is converted quite selectively to NH 3 while the oxygen atom forms CO 2 rather than water. Addition of, ≈1400 ppm water also enhances both CO and NO conversion over Pt/Al 2O 3 but N 2 rather than NH 3 is the favoured product. Hydrogen and water also produce significant rate enhancements with Rh/Al 2O 3 and Rh/CeO 2/Al 2O 3 but the product distributions are somewhat different from those with Pt/ Al 2O 3. Possible reasons for the enhanced activities and the observed selectivities are discussed.

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JO - Studies in Surface Science and Catalysis

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Enahncement of the reaction of nitric oxide and carbon monoxide by hydrogen and water over platinum and rhodium-containing catalysts

Abstract

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