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

Title data

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. Vol. 35 (2012) Issue 2 . - pp. 379-386.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.201100616

Official URL:

Abstract in another language

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.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Cobalt catalyst Eggshell catalyst Fischer-Tropsch reactor 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:	22 Jan 2015 07:05
Last Modified:	22 Jan 2015 07:06
URI:	https://eref.uni-bayreuth.de/id/eprint/5743