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Fischer–Tropsch synthesis with periodical draining of a liquid-filled catalyst by hydrogenolysis

Title data

Duerksen, Alexander ; Thiessen, Johannes ; Kern, Christoph ; Jess, Andreas:
Fischer–Tropsch synthesis with periodical draining of a liquid-filled catalyst by hydrogenolysis.
In: Sustainable Energy & Fuels. Vol. 4 (2020) . - pp. 2055-2064.
ISSN 2398-4902
DOI: https://doi.org/10.1039/C9SE01269A

Official URL: Volltext

Abstract in another language

Fischer–Tropsch (FT) reactors, e.g. fixed-beds, are usually operated in the steady state. The accumulation of long-chain liquid hydrocarbons (waxes) in the catalyst's pores during the start-up of a reactor then frequently leads to internal mass transfer limitations, and hence to a decrease of the effective reaction rate. An alternating FT/hydrogenolysis process is proposed to minimize pore diffusion limitations and to enhance the mean reaction rate. This transient process was realized by switching between a pore filling FTS sequence with only partially liquid-filled pores (at least on average) and a pore draining hydrogenolysis sequence, realized by a switch from syngas (H2, CO) to a H2-rich but CO-free feed gas. The preferential filling of the catalyst particles with higher C21+-hydrocarbons during FTS and the subsequent cracking to short-chain hydrocarbons by hydrogenolysis limit the production of waxes. The influence of the filling and draining time on the process enhancement as well as on the selectivity towards liquid fuels (C5–C20-fraction) was experimentally investigated, indicating an increase of the mean reaction rate by 20; further improvements are outlined based on theoretical considerations.

Further data

Item Type: Article in a journal
Refereed: Yes
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
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: 06 Apr 2020 07:19
Last Modified: 06 Apr 2020 07:26
URI: https://eref.uni-bayreuth.de/id/eprint/54840