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Regeneration of coked catalysts—modelling and verification of coke burn-off in single particles and fixed bed reactors

Title data

Kern, Christoph ; Jess, Andreas:
Regeneration of coked catalysts—modelling and verification of coke burn-off in single particles and fixed bed reactors.
In: Chemical Engineering Science. Vol. 60 (2005) Issue 15 . - pp. 4249-4264.
ISSN 0009-2509
DOI: https://doi.org/10.1016/j.ces.2005.01.024

Official URL: Volltext

Abstract in another language

The regeneration of a coked naphtha reforming catalyst (Pt/Re– Al 2 O 3 ) was studied by kinetic investigations on the effective rate of coke burn-off. For temperatures of industrial relevance for the catalyst, i.e., below 550 ∘ C (deactivation), the coke burn-off within the cylindrical particles ( d P ≈ 2 mm ) is determined by the interplay of chemical reaction and pore diffusion; limitation by external mass transfer can be excluded for T < 750 ∘ C . Based on the parameters of the intrinsic kinetics and of the structure of the catalyst (porosity, tortuosity), the regeneration process is modelled and discussed both on the level of a single particle and in a technical fixed bed reactor. The results of modelling are compared with data from lab-scale investigations (coke profiles within the particles) and the performance data of the regeneration in an industrial fixed bed reactor (moving reaction zone); the agreement of calculation and measurement is in both cases complete.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Regeneration; Coke burn-off; Moving reaction zone; Single particle; Fixed bed reactor
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Faculties
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 24 Apr 2015 09:24
Last Modified: 24 Apr 2015 09:24
URI: https://eref.uni-bayreuth.de/id/eprint/11154