Combined quantitative FTIR and online GC study of Fischer-Tropsch synthesis involving co-fed ethylene
| Autor: | Davide Dionisi, Andrew I. McNab, James A. Anderson, Alan J. McCue |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Ethylene 010405 organic chemistry Inorganic chemistry chemistry.chemical_element Fischer–Tropsch process 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Hydrocarbon chemistry Gas chromatography Physical and Theoretical Chemistry Selectivity Cobalt Syngas |
| Zdroj: | Journal of Catalysis. 362:10-17 |
| ISSN: | 0021-9517 |
| DOI: | 10.1016/j.jcat.2018.03.026 |
| Popis: | Combined quantitative in-situ FTIR and online gas chromatography have been applied to assess the effect of co-feeding ethylene on the length and nature of the hydrocarbon species formed on cobalt catalysts and the detected reaction products during Fischer-Tropsch synthesis. Reaction data showed that co-feeding ethylene leads to a decrease in methane selectivity and an increase in selectivity to C5-6 products. Comparison of the average length of the adsorbed species during reactions, in the presence and absence of co-fed ethylene reveals that ethylene may be incorporated into species which re-adsorb to the γ-alumina support from the gas phase. Additionally, co-feeding of ethylene appears to diminish the extent to which hydrocarbon species are transferred via spillover to the support. Varying the reaction temperature resulted in changes to both the average lengths of the adsorbed species and those of the reaction products. However, no direct relationship between surface species and reaction products could be determined, possibly due to the lack of detectable oxygenates in the product stream. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect