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Effectiveness of nano-scale ZSM-5 zeolite and its deactivation mechanism on catalytic cracking of representative hydrocarbons of naphtha
| 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)
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Submitter: 多湖 輝興
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