Deactivation of Pt/mordenite (MOR) during the hydroisomerisation of n-pentane

Lenoir, Christophe;Rohr, F;Allahverdiev, A;Stocker, M;Ruiz, Patricio
(2004) 14th International Zeolite Conference on Recent Advances in the Science and Technology of Zeolites and Related Materials — Location: Catalys Soc S Africa, Cape Town(South Africa) (25.April.2004)

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  • Lenoir, ChristopheUCLouvain
    Author
  • Rohr, F
    Author
  • Allahverdiev, A
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  • Stocker, M
    Author
  • Ruiz, PatricioUCLouvain
    Author
Abstract
The deactivation of Pt/MOR catalysts during the isomerisation of n-pentane was studied measuring the catalytic performances under favourable deactivation conditions and using several physicochemical techniques for characterisation: ICP, XRD, XPS, IR-pryridine, NMR, NH3-TPD and CO chemisorption. Results showed that deactivation is favoured by a high density and strength of acid sites, small pore diameters and probably by a small amount of octahedrally co-ordinated aluminium. Deactivation is more limited by larger pore diameters and higher Si/AI ratios. In this case, coke is formed in the deepest part of the pores. Catalysts with higher Si/AI atomic ratios are more difficult to regenerate. The nature of coke is similar in all cases and independent of the Si/Al ratio values.
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Lenoir, C., Rohr, F., Allahverdiev, A., Stocker, M., & Ruiz, P. (2004). Deactivation of Pt/mordenite (MOR) during the hydroisomerisation of n-pentane. Studies in Surface Science and Catalysis, 154, 2371-2379. https://doi.org/10.1016/S0167-2991(04)80500-7 (Original work published 2004)