SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 66 ›› Issue (2): 51-59.DOI: 10.1016/j.cjche.2023.11.002

• Full Length Article • 上一篇    下一篇

OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization

Tiesen Li1,2, Ting Chen1, Yinghui Ye1, Peng Dong1, Tinghai Wang1,2, Qingyan Cui1,2, Chan Wang1, Yuanyuan Yue1,2   

  1. 1. National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou 350002, China;
    2. Qingyuan Innovation Laboratory, Quanzhou 362801, China
  • 收稿日期:2023-09-03 修回日期:2023-11-14 出版日期:2024-02-28 发布日期:2024-04-20
  • 通讯作者: Chan Wang,E-mail:chan.wang@fzu.edu.cn;Yuanyuan Yue,E-mail:yueyy@fzu.edu.cn
  • 基金资助:
    We gratefully acknowledge the financial supports from the National Natural Science Foundation of China (22322803, 22178059, 22208054, 22221005 and 22072019), Key Technologies Innovation and Industrialization Projects of Fujian Province (2022G031) and Qingyuan Innovation Laboratory (00121002 and 00523005).

OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization

Tiesen Li1,2, Ting Chen1, Yinghui Ye1, Peng Dong1, Tinghai Wang1,2, Qingyan Cui1,2, Chan Wang1, Yuanyuan Yue1,2   

  1. 1. National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou 350002, China;
    2. Qingyuan Innovation Laboratory, Quanzhou 362801, China
  • Received:2023-09-03 Revised:2023-11-14 Online:2024-02-28 Published:2024-04-20
  • Contact: Chan Wang,E-mail:chan.wang@fzu.edu.cn;Yuanyuan Yue,E-mail:yueyy@fzu.edu.cn
  • Supported by:
    We gratefully acknowledge the financial supports from the National Natural Science Foundation of China (22322803, 22178059, 22208054, 22221005 and 22072019), Key Technologies Innovation and Industrialization Projects of Fujian Province (2022G031) and Qingyuan Innovation Laboratory (00121002 and 00523005).

摘要: A seed-directed approach to synthesizing FeZSM-22 zeolite without organic structure directing agent (OSDA) was developed by using Fe-rich diatomite as all aluminum and iron sources. The FeZSM-22 zeolite with optimal crystallinity and purity can be obtained by systematically adjusting feed composition and synthesis conditions. Characterizations show that FeZSM-22 zeolite synthesized with OSDA-free owns high crystallinity, obvious thin needle-shaped morphology and high Bronsted/Lewisacid ratio. Significantly, when used for n-octane hydroisomerization reaction, its derived catalyst exhibits the best catalytic performance reflected by the highest selectivity to C8 isomers compared to the two reference catalysts prepared based on a Fe-containing and a Fe-free ZSM-22 synthesized through an OSDA-directed route from natural diatomite and conventional chemicals, respectively. This work provides an alternative route to sustainably synthesizing heteroatomic zeolites with high performance.

关键词: FeZSM-22 zeolite, OSDA-free synthesis, Natural minerals, n-octane hydroisomerization

Abstract: A seed-directed approach to synthesizing FeZSM-22 zeolite without organic structure directing agent (OSDA) was developed by using Fe-rich diatomite as all aluminum and iron sources. The FeZSM-22 zeolite with optimal crystallinity and purity can be obtained by systematically adjusting feed composition and synthesis conditions. Characterizations show that FeZSM-22 zeolite synthesized with OSDA-free owns high crystallinity, obvious thin needle-shaped morphology and high Bronsted/Lewisacid ratio. Significantly, when used for n-octane hydroisomerization reaction, its derived catalyst exhibits the best catalytic performance reflected by the highest selectivity to C8 isomers compared to the two reference catalysts prepared based on a Fe-containing and a Fe-free ZSM-22 synthesized through an OSDA-directed route from natural diatomite and conventional chemicals, respectively. This work provides an alternative route to sustainably synthesizing heteroatomic zeolites with high performance.

Key words: FeZSM-22 zeolite, OSDA-free synthesis, Natural minerals, n-octane hydroisomerization