コンノ　ヒロキ   Konno Hiroki   今野　大輝    所属   東邦大学  理学部 生命圏環境科学科    職種   准教授
論文種別	原著
言語種別
査読の有無	査読あり
表題	Characterization and catalytic performance of modified nano-scale ZSM-5 for the acetone-to-olefins reaction
掲載誌名	正式名：Applied Catalysis A: General ISSNコード：0926-860X
巻・号・頁	475,127-133頁
著者・共著者	Hiroki Konno,Teruoki Tago,Yuta Nakasaka,Gaku Watanabe,Takao Masuda
担当区分	筆頭著者
発行年月	2014/04
概要	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. In 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 55 C-mol% for 180 h. © 2014 Elsevier B.V. All rights reserved.
DOI	10.1016/j.apcata.2014.01.031
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