Selective reduction of NO by HNCO over Pt promoted Al2O3
Artikel i vetenskaplig tidskrift, 1998

The activity of Pt supported on gamma-Al2O3 towards HNCO oxidation and reduction of NO by HNCO under oxygen excess is examined under transient conditions (temperature ramps between 100 and 500 degrees C). Formation of N-2, N2O, NO, and NO2 is observed. Isotope labelled (NO)-N-15 is used to show the scrambling of nitrogens in N-2 ((NN)-N-14-N-15) and N2O ((NNO)-N-14-N-15). Adsorbed species on the surface are characterised by in-situ FTIR spectroscopy in order to obtain information on reaction intermediates. Adsorbed NNx species are discussed as important intermediates in the N-2 and N2O formation. The absence of Pt results in a delay in HNCO ignition and only a small N2O formation is observed.

NITRIC-OXIDE

IR SPECTROSCOPY

ISOCYANIC ACID

PLATINUM

AMMONIA

SURFACE

CATALYSTS

Författare

Filip Acke

Kompetenscentrum katalys (KCK)

Chalmers, Institutionen för oorganisk miljökemi

Björn Westerberg

Institutionen för kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Institutionen för teknisk kemi

Journal of Catalysis

0021-9517 (ISSN) 1090-2694 (eISSN)

Vol. 179 528-536

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiteknik

DOI

10.1006/jcat.1998.2239