化工进展 ›› 2024, Vol. 43 ›› Issue (11): 6184-6194.DOI: 10.16085/j.issn.1000-6613.2023-1741

• 工业催化 • 上一篇    

Zr对Ni/Ti3C2催化剂结构及催化肉桂醛选择加氢的影响

李孟函1(), 苏通明1, 秦祖赠1(), 纪红兵1,2()   

  1. 1.广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西 南宁 530004
    2.浙江工业大学浙江绿色石化与轻烃转化研究院,浙江 杭州 310014
  • 收稿日期:2023-10-07 修回日期:2024-04-07 出版日期:2024-11-15 发布日期:2024-12-07
  • 通讯作者: 秦祖赠,纪红兵
  • 作者简介:李孟函(1998—),女,硕士研究生,研究方向为工业催化。E-mail:lmh799648213@163.com
  • 基金资助:
    国家自然科学基金(21968007);广西自然科学基金(2020GXNSFDA297007);广西石化资源加工及过程强化技术重点实验室开放课题(2023K002)

Effect of Zr on the structure and the hydrogenation properties for cinnamaldehyde of Ni/Ti3C2 catalyst

LI Menghan1(), SU Tongming1, QIN Zuzeng1(), JI Hongbing1,2()   

  1. 1.School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resourse Processing and Process Intensification Technology, Guangxi University, Nanning 530004, Guangxi, China
    2.Zhejiang Green Petrochemical and Light Hydrocarbon Transformation Research Institute, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2023-10-07 Revised:2024-04-07 Online:2024-11-15 Published:2024-12-07
  • Contact: QIN Zuzeng, JI Hongbing

摘要:

采用KBH4还原法制备了Zr负载量为5%~15%(质量分数)的NiZr/Ti3C2(MXene)催化剂,通过结构表征结合催化剂上肉桂醛选择加氢活性测试,研究添加Zr对Ni/Ti3C2催化剂结构及其催化肉桂醛选择加氢的影响。结果表明,随着Zr负载量的增加,能减少Ni金属颗粒团聚,载体Ti3C2的层状结构清晰,催化剂比表面积先增加后减小,表面酸性位点的种类变化不大,其中,10Ni10Zr/Ti3C2催化剂的活性金属Ni的平均粒径最小且具有最大比表面积(132.8m2/g),其Brønsted酸强度和稳定性略微增强,Lewis酸强度和稳定性降低,表现出最佳催化性能;在同一反应条件下,与10Ni/Ti3C2催化剂相比,10Ni10Zr/Ti3C2催化剂上肉桂醛的转化率从92.57%提高到98.34%,苯丙醛的选择性从91.15%增加到94.81%,苯丙醛收率提高了8.86%,在循环实验中表现出较高的稳定性。

关键词: NiZr/Ti3C2, 催化, 肉桂醛, 选择加氢, KBH4还原

Abstract:

NiZr/Ti3C2 (Ni mass fraction 10%) catalysts with a Zr supporting amount of 5%—15% were prepared by a KBH4 reduction method, and the effect of the Zr addition on the structure of the Ni/Ti3C2 catalyst and its catalytic activities for cinnamaldehyde selective hydrogenation were investigated by characterization combined with cinnamaldehyde selective hydrogenation on the catalysts. The results showed that with the increase in the Zr supporting amount, the agglomeration of Ni metal particles decreased, and the Ti3C2 support of the catalysts exhibited a well-defined layer structure. The specific surface area of the catalysts increased first and then decreased, while the types of surface acid sites changed little. Among them, the 10Ni10Zr/Ti3C2 catalyst exhibited a smallest average Ni active metal particle size and a maximum specific surface area of 132.8m2/g, as well as the Brønsted acid strength and stability was slightly enhanced, and the Lewis acid strength and stability was decreased, showing the optimal catalytic activity. Under the same reaction conditions, on the 10Ni10Zr/Ti3C2 catalysts, the cinnamaldehyde conversion was increased from 92.57% to 98.34%, the hydrocinnamaldehyde selectivity was increased from 91.15% to 94.81%, the hydrocinnamaldehyde yield was increased by 8.86% compared with the 10Ni/Ti3C2 catalyst. Furthermore, the 10Ni10Zr/Ti3C2 exhibited a high stability in cycling experiments.

Key words: NiZr/Ti3C2, catalysis, cinnamaldehyde, selective hydrogenation, KBH4 reduction

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