Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (5): 20240095.doi: 10.7503/cjcu20240095

• Article: Inorganic Chemistry • Previous Articles    

Synergistic Effects of Hierarchically Interconnected Porous Structure and Fe Modification on Zeolite ZSM-5 for Efficient Benzyl Alcohol Alkylation

SONG Yuhang1, LIU Zhan1, LYU Jiamin1, YU Shen1, LI Xiaoyun2, SUN Minghui1(), CHEN Lihua1(), SU Baolian1,3   

  1. 1.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
    2.State Key Laboratory of Silicate Material for Architecture,Wuhan University of Technology,Wuhan 430070,China
    3.Laboratory of Inorganic Materials Chemistry,University of Namur,Namur B? 5000,Belgium
  • Received:2024-02-24 Online:2024-05-10 Published:2024-03-25
  • Contact: SUN Minghui, CHEN Lihua E-mail:sunminghui@whut.edu.cn;chenlihua@whut.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2022YFB3504000);the National Natural Science Foundation of China(22302152);the Fundamental Research Funds for the Central Universities, China(2024IVA090)

Abstract:

Constructing hierarchically porous structures and embedding metal species into zeolite frameworks can effectively enable fast diffusion and synergistic catalysis. We report a one-step synthesis method to synthesize hierarchically macro-meso-microporous zeolite ZSM-5 single crystals containing Fe metal nanoclusters, that has advantages compared to multistep methods such as impregnation and ion exchange. Zeolite ZSM-5-Fe catalysts were prepared by steam assisted crystallization with addition of hierarchically porous carbon template and a Fe precursor. The catalyst was systematically characterized by means of X-ray diffraction(XRD), ultraviolet-visible spectroscopy (UV-Vis), H2-temperature program reduction(H2-TPR), and X-ray photoelectron spectroscopy(XPS). The results indicated that the isolated Fe(III) located at ion exchange sites and ferrite octahedron(six-coordinate) were the main redox-active centers. At a loading amount(mass fraction) of 1%, the highest benzyl alcohol conversion rate reached 59.3%, with a product selectivity of 83.2%, and a final yield of 49.3%. The catalyst maintained high catalytic activity even after five cycles, demonstrating its remarkable stability.

Key words: ZSM-5 zeolite, Hierarchical structure, Transition metal Fe, Aromatic alkylation

CLC Number: 

TrendMD: