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Influence of Particle Size and Single-Tube Diameter on Thermal Behavior of Fischer-Tropsch Reactors. Part II. Eggshell Catalysts and Optimal Reactor Performance

Titelangaben

Jess, Andreas ; Kern, Christoph:
Influence of Particle Size and Single-Tube Diameter on Thermal Behavior of Fischer-Tropsch Reactors. Part II. Eggshell Catalysts and Optimal Reactor Performance.
In: Chemical Engineering & Technology. Bd. 35 (2012) Heft 2 . - S. 379-386.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.201100616

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Link zum Volltext (externe URL): Volltext

Abstract

The optimal combination of particle and tube size for simulation of a single tube of a wall-cooled multitubular Fischer-Tropsch (FT) reactor with cobalt as catalyst was determined. The maximum size of the tubes, realized without temperature runaway, enhances with increasing particle size until an optimal value is reached, thereby improving the production rate of liquid fuels per tube. Reasons for this are that heat transfer to the cooled tube wall for a given tube size is considerably enhanced by increasing the particle size and that the influence of pore diffusion on the effective rate of FT synthesis gets stronger with rising particle size, which reduces the temperature sensitivity of the reactor and decreases the danger of a temperature runaway. The simulations indicate that the use of FT eggshell catalysts is not an option for fixed-bed reactors. The temperature sensitivity of the reactor is strongly enhanced, which decreases the maximum tube size and with that the productivity per tube. All these effects are valid in general for wall-cooled fixed-bed reactors. Respective criteria are presented.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Cobalt catalyst
Eggshell catalyst
Fischer-Tropsch reactor
Fixed-bed reactor
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik > Lehrstuhl Chemische Verfahrenstechnik - Univ.-Prof. Dr.-Ing. Andreas Jess
Fakultäten
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 660 Chemische Verfahrenstechnik
Eingestellt am: 22 Jan 2015 07:05
Letzte Änderung: 22 Jan 2015 07:06
URI: https://eref.uni-bayreuth.de/id/eprint/5743