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

doi:10.1016/j.cjche.2020.09.016

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 Zhang^1,2, Tonglu Zhang², Jing Zhang^1,2, Jiandong Zhang^1,2, Ruifeng Li²

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:2021-06-19 Published:2021-04-28
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).

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

Chaofeng Zhang^1,2, Tonglu Zhang², Jing Zhang^1,2, Jiandong Zhang^1,2, Ruifeng Li²

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

通讯作者: Chaofeng Zhang, Ruifeng Li
基金资助:
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

Abstract: The promising combustion and emission properties of polyoxymethylene dimethyl ethers (PODE_n) are of significant interest. However, the synthesis of PODE_n products with desired chain lengths is still a problem facing synthetic PODE_n. 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 PODE_3-5 products than their homogeneous counterparts in the synthesis of PODE_n from methanol (MeOH) and trioxymethylene (TOM). The encapsulated catalysts exhibit a superior PODE_3-5 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

摘要： The promising combustion and emission properties of polyoxymethylene dimethyl ethers (PODE_n) are of significant interest. However, the synthesis of PODE_n products with desired chain lengths is still a problem facing synthetic PODE_n. 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 PODE_3-5 products than their homogeneous counterparts in the synthesis of PODE_n from methanol (MeOH) and trioxymethylene (TOM). The encapsulated catalysts exhibit a superior PODE_3-5 selectivity and could be the promising catalysts for PODE n synthetic reaction.

关键词: SBA-16, Polyoxymethylene dimethyl ethers, Ionic liquids, Heterogeneous catalyst, Diesel fuel additives

Chaofeng Zhang, Tonglu Zhang, Jing Zhang, Jiandong Zhang, Ruifeng Li. Controllable synthesis of polyoxymethylene dimethyl ethers by ionic liquids encapsulated in mesoporous SBA-16[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 175-182.

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

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

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