Catalyst Deactivation 2001, Volume 139: Proceedings of the by J.J. Spivey, G.W. Roberts, B.H. Davis

By J.J. Spivey, G.W. Roberts, B.H. Davis

This complaints includes the papers offered on the ninth overseas Symposium on Catalyst Deactivation, held in Lexington, KY, united states, on 7-10 October 2001.

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Additional info for Catalyst Deactivation 2001, Volume 139: Proceedings of the 9th International Symposium, Lexington, KY, USA, October 2001 (Studies in Surface Science and Catalysis)

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Rio de Janeiro - Brazil. 30 2. EXPERIMENTAL The USHY zeolite ( N a o . 4 I - I 2 9 . 7 extraframework aluminium atoms) was obtained by calcination of a NH4Y zeolite (CBV 500, from PQ) under air flow at 500~ for 12h. 9 bar, T=250~ [8]. Acidity of the samples was determined from pyridine adsorption followed by IR spectroscopy [8]. The carbon content was measured by total burning at 1020~ under helium and oxygen with a Thermoquest NA 2100 analyser. The method of recovering the coke from coked zeolite samples was already described [4].

The concentrations in the outlet stream were analyzed by an on-line GC, in which a 30 m PoraPLOT-Q capillary column was used. The sample bed was loaded with a thin layer of a powder material, which amount was in the range from 15 to 20 mg. Quartz wool was used at the top and the bottom of the sample bed to keep the solid powder firmly packed. This is essential for a stable measurement. Prior to experiments the powder material was outgassed by in situ heating at 575 K in flowing carrier gas in order to remove adsorbed impurities.

Rumschitzki, J. , 169 (1997) 455. 11. E. A. Barteau, J. Phys. Chem. B, 101 (1997), 1113. 12. M. Petkovic and G. Larsen, J. , 191 (2000), 1. 13. W. Zhu, F. A. Moulijn, Adsorption, 6 (2000) 159. 14. D. ), Adsorption Analysis: Equilibria and Kinetics, Imperial College Press, London, 1998. 15. P. L. ), Adsorption Equilibrium Data Handbook, Prentice Hall, New Jersey, 1989. 16. J. Zhang, W. Zhu, M. Makkee, B. Van der Linden, F. A. Moulijn, J. Chem. Eng. Data, 46 (2001) 662. 17. K. C. C. S. Rumschitzki, Ind.

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