Facile Fabrication of ZSM-5 Zeolite Catalyst with High Durability to Coke Formation during Catalytic Cracking of Paraffins

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• 作者：Satoshi Inagaki ; Shoma Shinoda ; Yoshihiro Kaneko ; Kazuyoshi Takechi ; Raita Komatsu ; Yasuyuki Tsuboi ; Hiroshi Yamazaki ; Junko N. Kondo ; Yoshihiro Kubota
• 刊名：ACS Catalysis
• 出版年：2013
• 出版时间：January 4, 2013
• 年：2013
• 卷：3
• 期：1
• 页码：74-78
• 全文大小：260K
• 年卷期：v.3,no.1(January 4, 2013)
• ISSN：2155-5435

文摘

Post-synthetic HNO₃ treatment of ZSM-5 zeolite synthesized in the absence of organic structure-directing agent removes framework Al selectively from the external surface, producing a unique ZSM-5 zeolite catalyst that has very few acid sites on its external surfaces. The resulting external acid sites can be readily deactivated at the early stage of the reaction, giving a potentially long-life catalyst as a result of a high durability to coke formation during the cracking of hexane or other paraffin molecules.

Keywords:

ZSM-5 zeolite catalyst; structure-directing agent; acid treatment; dealumination; external surface; durability to coke formation