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Characterization and catalytic performance of modified nano-scale ZSM-5 for the acetone-to-olefins reaction

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Title: Characterization and catalytic performance of modified nano-scale ZSM-5 for the acetone-to-olefins reaction
Authors: Konno, Hiroki Browse this author
Tago, Teruoki Browse this author →KAKEN DB
Nakasaka, Yuta Browse this author
Watanabe, Gaku Browse this author
Masuda, Takao Browse this author
Keywords: Acidity modification
Acetone conversion
Light olefins
Issue Date: 5-Apr-2014
Publisher: Elsevier
Journal Title: Applied Catalysis A : General
Volume: 475
Start Page: 127
End Page: 133
Publisher DOI: 10.1016/j.apcata.2014.01.031
Abstract: In the acetone to olefins (ATO) reaction using ZSM-5 zeolites, isobutylene is initially produced via decomposition of an acetone dimer, followed by dimerization of the isobutylene and its cracking to form ethylene and propylene. Nano-scale ZSM-5 zeolite exhibited stable activity during the ATO reaction compared with that of macro-scale ZSM-5.1n order to further improve the catalytic stability of the nano-scale ZSM-5, control of the acidity of nano-scale ZSM-5 zeolites through SiO2 unit formation was examined using phenyl silane and triphenyl silane as new deactivators. This modification led to an increase in the olefins yield and an improvement in the catalyst lifetime. In particular, the regioselective deactivation of acid sites located on the external surface of the zeolite inhibits the formation of aromatics. Moreover, the acidity control within the pores significantly improved the catalyst lifetime. Notably, the modified nano-scale ZSM-5 zeolite exhibited a stable olefins yield above 55C-mol% for 180h.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 多湖 輝興

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