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Accumulation of liquid hydrocarbons in catalyst pores during cobalt-catalyzed Fischer-Tropsch synthesis

Title data

Pöhlmann, Ferdinand ; Kern, Christoph ; Rößler, Stefan ; Jess, Andreas:
Accumulation of liquid hydrocarbons in catalyst pores during cobalt-catalyzed Fischer-Tropsch synthesis.
In: Catalysis Science & Technology. Vol. 6 (2016) Issue 17 . - pp. 6593-6604.
ISSN 2044-4753
DOI: https://doi.org/10.1039/C6CY00941G

Abstract in another language

In the literature, it is widely claimed that during the initial period of Fischer-Tropsch synthesis liquid higher hydrocarbons fill catalyst pores completely, at least at temperatures of less than 250 [degree]C at a typical pressure of about 2 MPa. This leads to diffusional restrictions in the porous network for particles with a size appropriate for industrial fixed-bed operation (>1 mm), whereby catalyst effectiveness and product selectivity are strongly affected. However, under industrially relevant reaction conditions, our experimental and theoretical investigations on the interplay of reaction and diffusion in cobalt catalyst particles reveal that the pores are only partly filled with liquid higher hydrocarbons even at a very long time on stream of months or more for a chain growth probability of below about 0.8. Experiments were conducted in a magnetic suspension balance using particles of so called "technical" size (in the regime of 1-3 mm, relevant for industrial application), and a mathematical model was developed describing quite accurately the formation, vaporization and accumulation of liquid products and their C-number distribution in the porous particle.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
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
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions
Research Institutions > Research Units
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: 11 Aug 2016 06:25
Last Modified: 28 Feb 2019 09:10
URI: https://eref.uni-bayreuth.de/id/eprint/34082