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	Effectiveness of nano-scale ZSM-5 zeolite and its deactivation mechanism on catalytic cracking of representative hydrocarbons of naphtha
掲載誌名	正式名：Microporous and Mesoporous Materials ISSNコード：1387-1811
巻・号・頁	175,25-33頁
著者・共著者	Hiroki Konno,Teruoki Tago,Yuta Nakasaka,Ryota Ohnaka,Jun Ichi Nishimura,Takao Masuda
担当区分	筆頭著者
発行年月	2013
概要	The catalytic cracking of representative hydrocarbons of naphtha (n-hexane, cyclohexane, and methyl-cyclohexane) over ZSM-5 zeolite catalysts was examined at reaction temperatures ranging from 823 K to 923 K under atmospheric pressure. It was found that the Si/Al ratio of the zeolite affected the product selectivity and conversion. In order to investigate the effects of the crystal size of the ZSM-5 zeolites on catalyst lifetime, macro- and nano-scale ZSM-5 (Si/Al = 150) with crystal sizes of 2300 nm and 90 nm, respectively, were used for the cracking of representative naphtha hydrocarbons. In the cracking of naphthenes (cyclohexane and methyl-cyclohexane), coke was readily formed from the beginning of the reaction leading to significant deactivation of the catalyst for the macro-scale ZSM-5. In contrast, the nano-scale ZSM-5 exhibited a high conversion and high light olefins yield with stable activity, regardless of the type of reactant. As a result, the application of nano-scale ZSM-5 zeolites to the catalytic cracking of naphtha was effective and gave light olefins with high yield and excellent stable activity. © 2013 Elsevier Inc. All rights reserved.
DOI	10.1016/j.micromeso.2013.03.016
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