Structure and activity of dispersed Co, Ni, or Mo sulfides for slurry phase hydrocracking of vacuum residue
| Autor: | Yong-Kul Lee, Ki-Duk Kim, Sung-Ho Kim, Donghun Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Metal Cracking Residue (chemistry) Chemical engineering Oxidation state visual_art Slurry visual_art.visual_art_medium Physical and Theoretical Chemistry Solubility 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Catalysis. 364:131-140 |
| ISSN: | 0021-9517 |
| Popis: | The effects of Co, Ni, or Mo precursors having different oil solubility and oxidation state on the slurry phase hydrocracking (HCK) of vacuum residue (VR) was investigated at 673 K and 9.5 MPa H2. X-ray diffraction and extended X-ray absorption fine structure spectroscopy were used to obtain structural properties of the dispersed catalyst. Under standard operating condition, the metal precursors were found to form nanoscaled dispersed particles of MoS2, Co9S8, and Ni3S2, with the following VR HCK performances in the order MoS2 > Co9S8 ≫ Ni3S2, based on the same metal loading of 0.113 mmol. Among the oil-soluble Mo precursors such as Mo-hexacarbonyl, -octoate, and -naphthenate, it was observed that Mo-octoate having an intermediate oxidation state forms the smallest particles of 5.8 nm in size and shows the best activity in the VR HCK. |
| Databáze: | OpenAIRE |
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