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Effectiveness of nano-scale ZSM-5 zeolite and its deactivation mechanism on catalytic cracking of representative hydrocarbons of naphtha

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Title: Effectiveness of nano-scale ZSM-5 zeolite and its deactivation mechanism on catalytic cracking of representative hydrocarbons of naphtha
Authors: Konno, Hiroki Browse this author
Tago, Teruoki Browse this author →KAKEN DB
Nakasaka, Yuta Browse this author →KAKEN DB
Ohnaka, Ryota Browse this author
Nishimura, Jun-ichi Browse this author
Masuda, Takao Browse this author →KAKEN DB
Keywords: Catalytic cracking
Naphtha
Naphthenes
Nano-zeolite
ZSM-5
Issue Date: 15-Jul-2013
Publisher: Elsevier Science Bv
Journal Title: Microporous And Mesoporous Materials
Volume: 175
Start Page: 25
End Page: 33
Publisher DOI: 10.1016/j.micromeso.2013.03.016
Abstract: 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. (C) 2013 Elsevier Inc. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/53117
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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