Abstract
High temperature in situ FTIR has been used to investigate the surface species present on Cu/ZSM-5 during the reduction of NOx with propylene in a lean environment. Parallels have been observed between adsorbed surface species and catalytic activity for this reaction. Species detected at low temperatures are not representative of those detected at high temperatures where the catalyst is active. An oxidized nitrogen-containing species has been observed at 2580 cm−1 on Cu during reaction conditions (400°C). In contrast, at low temperatures, where the catalyst is less active, coke and Cu+-CO predominated. The effects of Cu weight loading, C/NO ratio, reaction temperature, and catalyst deactivation by steaming have been investigated with IR.
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B.H. Engler, J. Leyrer, E.S. Lox and K. Ostgathe, SAE930735, Detroit MI, 1–5 March 1993.
D.R. Monroe, C.L. DiMaggio, D.D. Beck and F.A. Matekunas, SAE930737, Detroit MI, 1–5 March 1993.
M. Kunno, T. Chikahisa, T. Murayama and M. Iwamoto, SAE Meeting, Detroit MI, 24–28 February 1992.
M. Iwamoto, N. Mizuno and H. Yahiro, Sekiyu Gakkaishi 34 (1991) 375.
M. Iwamoto, H. Yahiro, S. Shundo, Y. Yu-u and N. Mizuno, Appl. Catal. 69 (1991) L15.
S. Sato, Y. Yu-u, H. Yahiro, N. Mizuno and M. Iwamoto, Appl. Catal. 70 (1991) L1.
G.P. Ansell, A.F. Diwell, S.E. Golunski, J.W. Haynes, R.R. Rajaram, T.J. Truex and A.P. Walker, Appl. Catal. B 2 (1993) 81.
R. Burch and P.J. Millington, Appl. Catal. B 2 (1993) 101.
K.C.C. Kharas, Appl. Catal. B 2 (1993) 207.
T.J. Truex, R.A. Searles and D.C. Sun, Platinum Metals Rev. 36 (1992) 2.
M. Iwamoto, H. Yahiro, K. Tanda, N. Mizuno, Y. Mine and S. Kagawa, J. Phys. Chem. 95 (1991) 3727.
M. Iwamoto, H. Yahiro, Y. Mine and S. Kagawa, Chem. Lett. (1989) 213.
M. Iwamoto, Stud. Surf. Sci. Catal. 60 (1991) 327.
Y. Li and J.N. Armor, Appl. Catal. 76 (1991) L1.
Y. Li and W.K. Hall, J. Catal. 129 (1991) 202.
C.N. Montreuil and M. Shelef, Appl. Catal. B 1 (1992) L1.
M. Iwamoto and H. Hamada, Catal. Today 10 (1991) 57.
M. Iwamoto, H. Yahiro, N. Mizuno, W. Zhang, Y. Mine, H. Furukawa and S. Kagawa, J. Phys. Chem. 96 (1992) 9360.
G. Spotto, S. Bordiga, D. Scarano and A. Zecchina, Catal. Lett. 13 (1992) 39.
J. Valyon and K. Hall, J. Phys. Chem. 97 (1993) 1204.
J. Valyon and W.K. Hall, J. Phys. Chem. 97 (1993) 7054.
J. Sarkany, J. d'Itri and W.M.H. Sachtler, Catal. Lett. 16 (1992) 241.
J. Sarkany and W.M.H. Sachtler, Zeolites 14 (1994) 7.
Y. Ukisu, S. Sato, G. Muramatsu and K. Yoshida, Catal. Lett. 16 (1992) 11.
Y. Ukisu, S. Sato, G. Muramatsu and K. Yoshida, Catal. Lett. 11 (1991) 177.
Y. Ukisu, S. Sato, A. Abe and K. Yoshida, Appl. Catal. B 2 (1993) 147.
V. Bell, unpublished.
J.R. Ferraro and A. Walker, J. Chem. Phys. 42 (1965) 1278.
Y. Kuroda, S. Konno, K. Morimoto and J. Yoshikawa, J. Chem. Soc. Chem. Commun. (1993) 18.
T. Yamazaki, I. Watanuki, S. Ozawa and Y. Ogino, Mol. Phys. 53 (1991) 649.
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Bell, V.A., Feeley, J.S., Deeba, M. et al. In situ high temperature FTIR studies of NOx reduction with propylene over Cu/ZSM-5 catalysts. Catal Lett 29, 15–26 (1994). https://doi.org/10.1007/BF00814247
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DOI: https://doi.org/10.1007/BF00814247