Combined Operando X‐ray Diffraction/Raman Spectroscopy of Catalytic Solids in the Laboratory: The Co/TiO2 Fischer–Tropsch Synthesis Catalyst Showcase
| Autor: | Korneel H. Cats, Bert M. Weckhuysen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Analytical chemistry
Sintering chemistry.chemical_element 010402 general chemistry 01 natural sciences Catalysis law.invention Inorganic Chemistry symbols.namesake law Physical and Theoretical Chemistry Atmospheric pressure Full Paper 010405 organic chemistry Chemistry carbon Organic Chemistry Fischer–Tropsch process Full Papers Fischer-Tropsch synthesis cobalt Synchrotron 0104 chemical sciences X-ray diffraction X-ray crystallography Raman spectroscopy symbols Cobalt |
| Zdroj: | Chemcatchem |
| ISSN: | 1867-3899 1867-3880 |
| Popis: | A novel laboratory setup for combined operando X‐ray diffraction and Raman spectroscopy of catalytic solids with online product analysis by gas chromatography is presented. The setup can be used with a laboratory‐based X‐ray source, which results in important advantages in terms of time‐on‐stream that can be measured, compared to synchrotron‐based experiments. The data quality was much improved by the use of a relatively high‐energy MoKα radiation instead of the more conventional CuKα radiation. We have applied the instrument to study the long‐term deactivation of Co/TiO2 Fischer–Tropsch synthesis (FTS) catalysts. No sign of Co sintering or bulk oxidation was found during the experiments. However, part of the metallic Co was converted into cobalt carbide (Co2C), at elevated pressure (10 bar). Furthermore, graphitic‐like coke species are clearly formed during FTS at atmospheric pressure, whereas at elevated pressure fluorescence hampered the interpretation of the measured Raman spectra. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |