Synthesis of MFI type ferrisilicate zeolite (Fe-MFI) nanocrystals by a dry gel conversion (DGC) method and their application to methanol to olefin (MTO) reactions
| Autor: | Manabu Miyamoto, Norikazu Nishiyama, Yuichiro Hirota, Kaito Ono, Yoshiaki Uchida, Koji Miyake |
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| Rok vydání: | 2017 |
| Předmět: |
Olefin fiber
Ethylene Inorganic chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Aluminosilicate Materials Chemistry Hydroxide Hydrothermal synthesis Methanol 0210 nano-technology Zeolite Nuclear chemistry |
| Zdroj: | New Journal of Chemistry. 41:2235-2240 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | We have synthesized MFI type ferrisilicate zeolite (Fe-MFI) nanocrystals with a crystal size smaller than 100 nm by a dry gel conversion (DGC) method using a sole template (tetrapropylammonium hydroxide). The crystal size of Fe-MFI synthesized by the DGC method was much smaller than that of Fe-MFI synthesized by a conventional hydrothermal synthesis (HTS) method despite using the same precursor solution. The catalytic performance of the nano-sized Fe-MFI in methanol to olefin (MTO) reactions was investigated. The Fe-MFI catalysts showed higher propylene to ethylene (P/E) ratios and lower light paraffin yields compared with MFI type aluminosilicate zeolites (Al-MFI) for both the synthesis methods. In addition, nano-sized Fe-MFI showed a higher P/E ratio (ca. 30) and a longer catalyst lifetime than macro-sized Fe-MFI synthesized by the HTS method. |
| Databáze: | OpenAIRE |
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