Kinetic Modeling of Secondary Methane Formation and 1-Olefin Hydrogenation in Fischer-Tropsch Synthesis over a Cobalt Catalyst
| Autor: | Branislav Todic, Wenping Ma, Gary Jacobs, Nikola M. Nikačević, Dragomir B. Bukur, Burtron H. Davis |
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| Rok vydání: | 2017 |
| Předmět: |
Olefin fiber
biology Chemistry Organic Chemistry Inorganic chemistry Active site chemistry.chemical_element Continuous stirred-tank reactor Fischer–Tropsch process 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Kinetic energy 01 natural sciences 7. Clean energy Biochemistry Methane 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound biology.protein Physical and Theoretical Chemistry 0210 nano-technology Cobalt |
| Zdroj: | International Journal of Chemical Kinetics. 49:859-874 |
| ISSN: | 0538-8066 |
| Popis: | A detailed kinetic model of Fischer–Tropsch synthesis (FTS) product formation, including secondary methane formation and 1-olefin hydrogenation, has been developed. Methane formation in FTS over the cobalt-based catalyst is well known to be higher-than-expected compared to other n-paraffin products under typical reaction conditions. A novel model proposes secondary methane formation on a different type of active site, which is not active in forming C2+ products, to explain this anomalous methane behavior. In addition, a model of secondary 1-olefin hydrogenation has also been developed. Secondary 1-olefin hydrogenation is related to secondary methane formation with both reactions happening on the same type of active sites. The model parameters were estimated from experimental data obtained with Co/Re/γ-Al2O3 catalyst in a slurry-phase stirred tank reactor over a range of conditions (T = 478, 493, and 503 K, P = 1.5 and 2.5 MPa, H2/CO feed ratio = 1.4 and 2.1, and XCO = 16–62%). The proposed model including secondary methane formation and 1-olefin hydrogenation is shown to provide an improved quantitative and qualitative prediction of experimentally observed behavior compared to the detailed model with only primary reactions. |
| Databáze: | OpenAIRE |
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