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Synthesis of Hierarchical TS-1 and Its Recycling Catalytic Property for Oxidative Desulfurization

Jinglong Huai1, Xiaoxue Liu2,*, Yinhai Zhang1, Yang Yang1, Yan Gou1, Li Qin1, Jinling Shan1, Yancheng Zheng1, Hao Li1,*

1 College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023, China
2 College of Agriculture, Yangtze University, Jingzhou, 434000, China

* Corresponding Authors: Xiaoxue Liu. Email: email'" />,email'" />; Hao Li. Email: email'" />,email'" />

(This article belongs to this Special Issue: New Insights on Nanomaterials for Energy, Environmental and Agricultural Applications)

Journal of Renewable Materials 2022, 10(6), 1711-1726. https://doi.org/10.32604/jrm.2022.018474

Abstract

Because of its unique pore structure, good hydrothermal stability and high specific surface area, hierarchical TS-1 zeolite (HTS-1) has become an important catalyst for the deep oxidative desulfurization of fuel oils. In this work, HTS-1 has been successfully synthesized by a hydrothermal crystallization method using the C-SiO2 composite as both silicon source and mesoporous template, tetrapropylammonium hydroxide as microporous template, and tetrabutylorthotitanate as titanium source. The C-SiO2 composite is obtained by mild carbonization of the SiO2/T-40 (Tween 40) xerogel, which is prepared by the two step sol-gel method. The reaction conditions for the oxidative desulfurization (ODS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) over HTS-1 are optimized systematically, and the recycling performances of HTS-1 are investigated in detail. After the 15th run, HTS-1 still maintains high DBT conversion (90.6%) and 4,6-DMDBT conversion (86.0%) without deactivation. The samples before and after recycle tests are characterized by XRD, FT-IR, CHN analysis, UV-Vis and SEM techniques. The results indicate that the crystal structure and morphology of regenerated HTS-1 samples are well kept, which accounts for the good structural stability and reusability of HTS-1. In addition, active intermediates for the ODS of bulky organic sulfides over HTS-1, i.e., Ti-peroxo (Ti-OOtBu) species, are captured by the UV-Vis technique. Finally, a possible reaction mechanism for the ODS process over HTS-1 is proposed.

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Synthesis of Hierarchical TS-1 and Its Recycling Catalytic Property for Oxidative Desulfurization

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Cite This Article

Huai, J., Liu, X., Zhang, Y., Yang, Y., Gou, Y. et al. (2022). Synthesis of Hierarchical TS-1 and Its Recycling Catalytic Property for Oxidative Desulfurization. Journal of Renewable Materials, 10(6), 1711–1726.

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cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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