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Controlling Catalytic Activities for Hydroisomerization and Hydrocracking of Long-chain Alkanes Using Pt–Mg-supported Zeolite Catalysts
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- KIMURA Kentaro
- Dept. of Chemical Science and Engineering, Tokyo Institute of Technology
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- SAIKA Takashi
- Dept. of Chemical Science and Engineering, Tokyo Institute of Technology
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- TSUCHIYA Takumi
- Dept. of Chemical Science and Engineering, Tokyo Institute of Technology
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- FUJITSUKA Hiroyasu
- Dept. of Chemical Science and Engineering, Tokyo Institute of Technology Dept. of Chemical Engineering, Kyoto University
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- TAGO Teruoki
- Dept. of Chemical Science and Engineering, Tokyo Institute of Technology
Bibliographic Information
- Other Title
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- Pt–Mg担持ゼオライト触媒による長鎖アルカンの異性化･分解反応の制御
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Description
<p>Conversion of long-chain alkanes derived from vegetable oils and fats into jet fuel is an important area of research. Hydroisomerization and hydrocracking of n-paraffins are necessary to convert long-chain alkanes with 16 to 20 carbon atoms into jet fuel containing isoparaffins with 9 to 15 carbon atoms. Bifunctional catalysts such as Pt-supported zeolite catalysts are effective for these reactions. However, how the properties of catalyst affect the reaction pathways of the hydroisomerization and hydrocracking reactions remains unclear. Therefore, we investigated the hydroisomerization and hydrocracking of n-paraffins into isoparaffins, which have carbon chains 3 to 5 atoms shorter than n-paraffins, over Pt-supported zeolite catalysts using n-dodecane (n-C12) as a raw material to convert biomass-derived C16-20 into jet fuel (C9-15). This study focused on the effect of MgO modification of Pt-supported zeolites, and the pore size of zeolites (MFI, Beta, and FAU) on the reaction pathway. MgO modification of Pt-supported zeolite mainly decreased the amount of acid sites, suppressed overcracking of i-C7-9, and doubled the i-C7-9 yield for MFI. Furthermore, Beta and FAU with large pores promoted the isomerization from n-C12 to i-C12 with 3 or more branched chains compared to MFI, which was then cracked to i-C7-9 resulting in higher yield of i-C7-9.</p>
Journal
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- Journal of the Japan Petroleum Institute
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Journal of the Japan Petroleum Institute 67 (5), 195-202, 2024-09-01
The Japan Petroleum Institute