| Autor: |
Lilia Sineva, Kirill Gryaznov, Victor De, Andrei Gorshkov, Vladimir Mordkovich |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Reactions, Vol 4, Iss 1, Pp 92-105 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2624-781X |
| DOI: |
10.3390/reactions4010004 |
| Popis: |
Some kinetic parameters of Fischer–Tropsch synthesis (FTS) were determined in the presence of a granular cobalt/zeolite catalyst. Usually, kinetic studies of granular catalysts are considered to be complicated by external and internal diffusion. We managed to obtain a catalyst with a special structure of the active surface, where sites active in FTS are isolated from each other due to the environment of inactive spinel CoAl2O4 and inter-site transport is provided by an extensive intragranular graphitic network serving simultaneously as a heat-conductive medium. As a result, FTS proceeded in the kinetic region. It was found that the reaction kinetics obey the Arrhenius law; whereas, the activation energy is different in different temperature ranges, i.e., 118.2 kJ/mol in the range of 180–210 °C, and 173.6 kJ/mol in the range of 232–243 °C. This behavior is determined by the presence of zeolite, which becomes active in the secondary transformations of FTS products at temperatures beyond 210 °C. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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