Abstract
Two intense IR absorption bands due to surface isocyanate (-NCO) species have been observed at 2262 and 2232 cm−1 when an alumina-supported silver catalyst is exposed to a mixture of NO, O2 and ethanol at 150°C and subsequently heated to > 300°C in vacuum. The intensity of the isocyanate band is hardly affected by the water existing in the mixture. Methanol is less reactive than ethanol for the formation of isocyanate species. The reaction mechanism of catalytic reduction of lean NOx with alcohols is discussed based on these IR spectroscopic findings.
Similar content being viewed by others
References
S. Sumiya, G. Muramatsu, N. Matsumura, K. Yoshida and R. Sehende, SAE Paper 920853 (1992).
T. Miyadera, Appl. Catal. B 2 (1993) 199.
T. Miyadera, A. Abe, G. Muramatsu and K. Yoshida, in:Advanced Materials, '93 V/A: Ecomaterials (Eisevier, Amsterdam, 1994) p. 405.
T. Miyadera and K. Yoshida, Chem. Lett. (1993) 1483.
T. Miyadera, J. Jpn. Inst. Energy 73 (1994) 987.
Y. Ukisu, S. Sato, G. Muramatsu and K. Yoshida, Catal. Lett. 11 (1991) 177.
Y. Ukisu, S. Sato, G. Muramatsu and K. Yoshida, Catal. Lett. 16 (1992) 11.
Y. Ukisu, S. Sato, A. Abe and K. Yoshida, Appl. Catal. B 2 (1993) 147.
V.A. Bell, J.S. Feeley, M. Deeba and R.J. Farrauto, Catal. Lett. 29 (1994) 15.
H. Yasuda, T. Miyamoto and M. Misono, Preprints Am. Chem. Soc. Div. Petrol. Chem. 39 (1994) 99.
C. Li, K.A. Bethke, H.H. Kung and M.C. Kung, J. Chem. Soc. Chem. Commun. (1995) 813.
G.R. Bamwenda, A. Obuchi, A. Ogata and K. Mizuno, Chem. Lett. (1994) 2109.
N.W. Hayes, W. Grunert, GJ. Hutchings, R.W. Joyner and E.S. Shpiro, J. Chem. Soc. Chem. Commun. (1994) 531.
K. Nakamoto,Infrared and Raman Spectra of Inorganic and Coordination Compounds, 4th Ed. (Wiley-Interscience, New York, 1986).
T. Miyadera, to be published.
M.L. Unland, Science 179 (1973) 567.
M.L. Unland, J. Phys. Chem. 79 (1975) 610.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ukisu, Y., Miyadera, T., Abe, A. et al. Infrared study of catalytic reduction of lean NOx with alcohols over alumina-supported silver catalyst. Catal Lett 39, 265–267 (1996). https://doi.org/10.1007/BF00805593
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00805593