Download Activation, Deactivation, and Poisoning of Catalysts by John B. Butt PDF

By John B. Butt

ISBN-10: 0121476952

ISBN-13: 9780121476953

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Extra resources for Activation, Deactivation, and Poisoning of Catalysts

Example text

Essentially, thus ends the exposition of Kmak. Now the reader will understand that this still leaves us a long way from direct application of the methodology developed earlier. What would remain to be specified? Essentially we need to do three things: (1) Identify the nature of coke precursors. (2) Determine the relationship between coke content and the fraction of active sites a [which is related to L in Eq. (2-72)]. (3) Determine the dependence of the rehydrogenation rate on pHl and also determine whether the reverse rate £%C-HC has the same impact as the forward rate on the active fraction a.

J. J. Berzelius, Ann. Chem. Phys. 61, 146 (1836). 4. M. Boudart, Chem. Eng. Prog. 57, 33 (1961). 5. R. L. , ACS Symp. Ser. No. 222, 3 (1983). 6. J. B. Butt, AIChEJ. 22, 1 (1976). 26 1. Physical and Chemical Description of Deactivation 7. 8. 9. 10. J. J. , p. 124 (1974). M. Faraday, Philos. Trans. R. Soc. London. 124, 55 (1834). S. Fuentes and J. C. S. S. Faraday I 74, 174 (1978). S. J. Gregg and K. S. W. " Academic Press, New York, 1967. W. B. Innes, in "Experimental Methods in Catalysis Research" (R.

Clearly there are significant deviations from the model of kinetic separability. 30 "250 (Ι/ΌχΙΟ3, K_l Fig. 2-1. Experimental data and model prediction for thiophene poisoning of Ni benzene hydrogenation catalyst. ( ), Model prediction with experimental parameters; ( ), computed on assumption of kinetic separability of poisoning. 41 I. Deactivation of Systems Having a Single Main Reaction C. Deactivation of Systems Having Multiple Reaction Networks A multiple reaction network, as used herein, refers to a reacting system that requires two or more stoichiometric equations for its description.

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