2021年2月
Mechanochemical Approach to Preparation of MFI Zeolites Substituted Isomorphously by Both Al and Fe as Durable Catalysts for the Dimethyl Ether to Olefin Reaction
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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- 巻
- 60
- 号
- 5
- 開始ページ
- 2079
- 終了ページ
- 2088
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.iecr.0c05386
- 出版者・発行元
- AMER CHEMICAL SOC
Zeolites with an MFI-type framework topology containing both Al and Fe ([Al, Fe]-MFI) atoms were prepared via a two-step mechanochemically assisted method. In the first step, reactions between SiO2 and either alpha-Fe2O3 or gamma-AlO(OH), induced by mechanical force during planetary ball-milling, produced one of the two types of amorphous composites. A second hydrothermal treatment of a mixture of these composites yielded the [Al, Fe]-MFI zeolites. The thus-prepared [Al, Fe]-MFI zeolites exhibited a longer lifetime in the catalytic conversion of dimethyl ether into light olefins, compared to zeolites prepared via the conventional one-pot hydrothermal process using homogeneous reagents. Extraframework Fe species were absent and Fe atoms were well distributed throughout the MFI zeolite prepared via the two-step process, while the conventionally prepared zeolites contained extraframework Fe species. The better homogeneity of Fe atoms in the zeolite catalyst achieved by the mechanochemically assisted method led to a longer catalyst lifetime.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.iecr.0c05386
- ISSN : 0888-5885
- Web of Science ID : WOS:000619636600011