Formation of isocyanic acid during the reaction of mixtures of NO, CO and H2 over supported platinum catalysts

Ralf Dümpelmann; Noel W. Cant; David L. Trimm

doi:10.1016/0926-3373(95)00024-0

Formation of isocyanic acid during the reaction of mixtures of NO, CO and H₂ over supported platinum catalysts

Ralf Dümpelmann^*, Noel W. Cant, David L. Trimm

^*Corresponding author for this work

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

47 Citations (Scopus)

Abstract

On-line infrared spectroscopy has been used to show that isocyanic acid, HNCO, is a substantial primary product of the reaction between NO, CO and H₂ over a Pt/SiO₂ catalyst. At 230°C it accounts for more than 40% of the CO converted. No isocyanic acid is seen when Al₂O₃ is placed downstream of Pt/SiO₂, or when using a Pt/Al₂O₃ catalyst under the same conditions, due to rapid hydrolysis of HNCO on the alumina. Isocyanic acid may exist as a trace intermediate in automobile catalytic converters during their warm-up phase but it is unlikely to emerge from the pore system of aluminabased catalysts.

Original language	English
Journal	Applied Catalysis B, Environmental
Volume	6
Issue number	4
DOIs	https://doi.org/10.1016/0926-3373(95)00024-0
Publication status	Published - 30 Sept 1995

Keywords

HNCO
Isonyanic acid
NO/CO/H mixtures
Platinum
Pt/AlO
Pt/SiO

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10.1016/0926-3373(95)00024-0

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title = "Formation of isocyanic acid during the reaction of mixtures of NO, CO and H2 over supported platinum catalysts",

abstract = "On-line infrared spectroscopy has been used to show that isocyanic acid, HNCO, is a substantial primary product of the reaction between NO, CO and H2 over a Pt/SiO2 catalyst. At 230°C it accounts for more than 40% of the CO converted. No isocyanic acid is seen when Al2O3 is placed downstream of Pt/SiO2, or when using a Pt/Al2O3 catalyst under the same conditions, due to rapid hydrolysis of HNCO on the alumina. Isocyanic acid may exist as a trace intermediate in automobile catalytic converters during their warm-up phase but it is unlikely to emerge from the pore system of aluminabased catalysts.",

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T1 - Formation of isocyanic acid during the reaction of mixtures of NO, CO and H2 over supported platinum catalysts

AU - Dümpelmann, Ralf

AU - Cant, Noel W.

AU - Trimm, David L.

PY - 1995/9/30

Y1 - 1995/9/30

N2 - On-line infrared spectroscopy has been used to show that isocyanic acid, HNCO, is a substantial primary product of the reaction between NO, CO and H2 over a Pt/SiO2 catalyst. At 230°C it accounts for more than 40% of the CO converted. No isocyanic acid is seen when Al2O3 is placed downstream of Pt/SiO2, or when using a Pt/Al2O3 catalyst under the same conditions, due to rapid hydrolysis of HNCO on the alumina. Isocyanic acid may exist as a trace intermediate in automobile catalytic converters during their warm-up phase but it is unlikely to emerge from the pore system of aluminabased catalysts.

AB - On-line infrared spectroscopy has been used to show that isocyanic acid, HNCO, is a substantial primary product of the reaction between NO, CO and H2 over a Pt/SiO2 catalyst. At 230°C it accounts for more than 40% of the CO converted. No isocyanic acid is seen when Al2O3 is placed downstream of Pt/SiO2, or when using a Pt/Al2O3 catalyst under the same conditions, due to rapid hydrolysis of HNCO on the alumina. Isocyanic acid may exist as a trace intermediate in automobile catalytic converters during their warm-up phase but it is unlikely to emerge from the pore system of aluminabased catalysts.

KW - HNCO

KW - Isonyanic acid

KW - NO/CO/H mixtures

KW - Platinum

KW - Pt/AlO

KW - Pt/SiO

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U2 - 10.1016/0926-3373(95)00024-0

DO - 10.1016/0926-3373(95)00024-0

M3 - Article

AN - SCOPUS:0028887862

SN - 0926-3373

VL - 6

JO - Applied Catalysis B, Environmental

JF - Applied Catalysis B, Environmental

IS - 4

ER -

Formation of isocyanic acid during the reaction of mixtures of NO, CO and H₂ over supported platinum catalysts

Abstract

Keywords

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