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. (8th February 2017)

• Record Type: Journal Article
• Authors: Miyake, Koji; Hirota, Yuichiro; Ono, Kaito; Uchida, Yoshiaki; Miyamoto, Manabu; Nishiyama, Norikazu
• Is Part Of: New journal of chemistry. Volume 41:Number 6(2017)
• Page Start: 2235
• Page End: 2240
• Publication Date: 2017-02-08
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj03538h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Fe-MFI nanocrystals were synthesized by a dry gel conversion method and showed superior catalytic performance in methanol to olefin reactions. Abstract : 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.