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	Effects of crystal size and Si/Al ratio of MFI-type zeolite catalyst on n-hexane cracking for light olefin synthesis
掲載誌名	正式名：Journal of the Japan Petroleum Institute ISSNコード：1346-8804/1349-273X
巻・号・頁	55(4),267-274頁
著者・共著者	Hiroki Konno,Takuya Okamura,Yuta Nakasaka,Teruoki Tago,Takao Masuda
担当区分	筆頭著者
発行年月	2012
概要	Catalytic cracking of n-hexane over MFI-type zeolite catalysts was examined at a reaction temperature of 823 K under atmospheric pressure. Conversion of n-hexane depended on the Si/Al ratio of the MFI-type zeolite catalyst, so the relationships between the product yields and n-hexane conversion could be fitted as single, smooth curves. To investigate the effect of crystal size of MFI-type zeolite on the catalytic activity, light olefin yield and product composition, nano- and macro-sized MFI-type zeolites with crystal sizes of approximately 150-200 nm and 1.5 μm, respectively, were prepared. The nano-sized zeolite exhibited a high n-hexane conversion with stable activity for 18 h compared with the macro-sized zeolite. The high activity of the nano-sized MFI-type zeolite is considered to be due to rapid diffusion of the produced light olefins out of the intracrystalline pores of the nanozeolite due to the low diffusion resistance. Accordingly, the nano-sized zeolite achieved high yield of light olefins (approximately 35 %) and long catalyst lifetime.
DOI	10.1627/jpi.55.267
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