Chinese Journal of Chemical Engineering ›› 2021, Vol. 32 ›› Issue (4): 175-182.doi: 10.1016/j.cjche.2020.09.016

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Controllable synthesis of polyoxymethylene dimethyl ethers by ionic liquids encapsulated in mesoporous SBA-16

Chaofeng Zhang1,2, Tonglu Zhang2, Jing Zhang1,2, Jiandong Zhang1,2, Ruifeng Li2   

  1. 1 College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    2 College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2019-12-27 Revised:2020-09-01 Online:2021-04-28 Published:2021-06-19
  • Contact: Chaofeng Zhang, Ruifeng Li;
  • Supported by:
    The authors greatly acknowledge Prof. Tim Storr from Simon Fraser University for his help in English writing and improving of this paper. The work was supported by the Natural Science Foundation of Shanxi Province (201801D121062), the Shanxi Scholarship Council of China (2017-037), and the Foundation of Taiyuan University of Technology (2016MS03).

Abstract: The promising combustion and emission properties of polyoxymethylene dimethyl ethers (PODEn) are of significant interest. However, the synthesis of PODEn products with desired chain lengths is still a problem facing synthetic PODEn. Herein, a series of unique IL@SBA-16-Cx solid catalysts are prepared by encapsulation of ionic liquids (ILs) within the nanocage of SBA-16 through a silylation method. The structure of the encapsulated catalyst was characterized by UV-vis spectra, Fourier transform infrared (FT-IR), N2 adsorption-desorption isotherms, Powder X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Elemental analysis. The encapsulated catalysts show similar catalytic activity to the homogeneous counterparts and display higher selectivity to the targeted PODE3-5 products than their homogeneous counterparts in the synthesis of PODEn from methanol (MeOH) and trioxymethylene (TOM). The encapsulated catalysts exhibit a superior PODE3-5 selectivity and could be the promising catalysts for PODE n synthetic reaction.

Key words: SBA-16, Polyoxymethylene dimethyl ethers, Ionic liquids, Heterogeneous catalyst, Diesel fuel additives