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Schröder, Dominik ; Thiessen, Johannes ; Jess, Andreas ; Scholz, Judith:
Influence of the formation of short-chain olefins by manganese/cobalt-catalyzed Fischer–Tropsch synthesis on the selectivity and effective reaction rate.
In: Catalysis Science & Technology.
Bd. 10
(2020)
Heft 2
.
- S. 475-483.
ISSN 2044-4761
DOI: https://doi.org/10.1039/C9CY02022E
Abstract
The Fischer–Tropsch synthesis (FTS) offers a wide ranging distribution of hydrocarbons. For cobalt catalysts with manganese as a promoter, a high selectivity to olefins is found for the low-temperature FTS. In this work, Mn–Co catalysts on SiO2 as support were tested. For small catalyst particles (≤150 μm), a high selectivity towards C3–C8 olefins with an SC3−C8,ole = 38 was obtained. For larger particles (diameters of up to 1.6 mm), an unexpected higher reaction rate, a higher chain growth probability, and a decrease in olefin selectivity (SC3−C8,ole = 7) were observed. These effects can be explained by secondary reactions of the olefins combined with the influence of pore diffusion.