Gil, A.
Ruiz, Patricio
[UCL]
Delmon, Bernard
[UCL]
This article presents new results concerning a bistability phenomenon observed recently in the oxidative dehydrogenation of 2- propanol over copper catalysts. In this system, an activity hysteresis loop is observed when the partial oxygen pressure is varied. This bistability has been explained by the oxidation of metallic copper when the partial oxygen pres sure increases and copper oxide reduction when the partial oxygen pressure decreases. In the experiments reported here, an external second phase (alpha-Sb2O4, SnO2, Cr2O3, CeO2, Co3O4, MoO3, PbO2, NiO, Bi2O3 and MnO2) has been mixed with the copper catalysts. This modifies the hysteresis loop. The possible role played by the oxygen spillover at low temperature (150 degrees C) on this modification is discussed.
- Amariglio, J. Catal., 118, 164 (1989)
- Barr, J. Phys. Chem., 82, 1801 (1978)
- Brundle, J. Phys. Chem., 92, 5213 (1988)
- Eckert, Chem. Eng. Commun., 1, 95 (1975)
- Eng, J. Catal., 106, 342 (1987)
- Gil, J. Catal., 159, 496 (1996)
- Greger M., Ihme B., Kotter M., Riekert L., Nonequilibrium Phase Transitions with Hysteresis in Solid Catalysts. The System Copper-Oxygen-Propene, 10.1002/bbpc.19840880422
- Hierl, J. Catal., 69, 475 (1981)
- Hugo, Chem. Eng. Tech., 44, 383 (1972)
- Imbihl, J. Chem. Phys., 84, 3519 (1986)
- Kaur, P., D., Martin, D. Duprez, E. Gaigneaux and P. Ruiz, “Impact of Surface Mobility in Selective Oxidation. Isotopic Exchange of 18O2 with 16O2 on Various Oxides”, in “Proc. EUROPACAT'II”, Maastrich, The Netherlands, Sept. 3-8, p. 155 (1995).
- Kurtanjek, J. Catal., 66, 11 (1980)
- Lynch, J. Catal., 97, 456 (1986)
- Mestl, J. Phys. Chem., 98, 11283 (1994)
- Panzer, Surf. Sci., 151, 400 (1985)
- Razon, Catal. Rev. - Sci. Eng., 28, 89 (1986)
- Rebitzki, AIChE., 41, 1543 (1995)
- Riekert L., A note on multiplicity of the steady state and oscillation-phenomena in catalytic oxidation, 10.1002/bbpc.19810850409
- Sheintuch, Catal. Rev. - Sci. Eng., 15, 107 (1977)
- Sheintuch, J. Catal., 96, 326 (1985)
- Slin'ko, Catal. Rev. - Sci. Eng., 17, 119 (1978)
- Thomas, Catalysis Deactivation, 353 (1980)
- Turner, Surf. Sci., 103, 54 (1981)
- Varghese, J. Catal., 55, 76 (1978)
- Vayenas, J. Catal., 66, 36 (1980)
- Vayenas, J. Catal., 67, 348 (1981)
- Wagner, Handbook of X-ray Photoelectron Spectroscopy (1979)
- Weng, J. Molec. Catal., 52, 349 (1989)
- Weng, J. Catal., 132, 319 (1991)
- Weng, Appl. Catal. A: General, 81, 141 (1992)
- Zuñiga, J. Catal., 53, 312 (1978)
Référence bibliographique |
Gil, A. ; Ruiz, Patricio ; Delmon, Bernard. Influence of various metal oxides in the bistability observed in the oxidative dehydrogenation of 2 - propanol over copper catalysts.2nd International Conference on Unsteady-State Processes in Catalysis (ST LOUIS(Mo), Sep 11-14, 1995). In: Canadian Journal of Chemical Engineering, Vol. 74, no. 5, p. 600-605 (1996) |
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http://hdl.handle.net/2078.1/62836 |