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

Koji Miyake; Yuichiro Hirota; Kaito Ono; Yoshiaki Uchida; Manabu Miyamoto; Norikazu Nishiyama

doi:10.1039/C6NJ03538H

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

Koji Miyake,

*^a Yuichiro Hirota,^a Kaito Ono,^a Yoshiaki Uchida,

^ab Manabu Miyamoto^c and Norikazu Nishiyama^a

Author affiliations

* Corresponding authors

^a Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
E-mail: kojimiyake@cheng.es.osaka-u.ac.jp

^b PRESTO JST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

^c Department of Chemistry and Biomolecular Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan

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.

Article information

https://doi.org/10.1039/C6NJ03538H

Article type

Paper

Submitted

13 Nov 2016

Accepted

23 Jan 2017

First published

24 Jan 2017

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New J. Chem., 2017,41, 2235-2240

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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

K. Miyake, Y. Hirota, K. Ono, Y. Uchida, M. Miyamoto and N. Nishiyama, New J. Chem., 2017, 41, 2235 DOI: 10.1039/C6NJ03538H

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New Journal of Chemistry

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

Abstract

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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

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