Issue 49, 2024

Silicotungstate@ZIF-67 as an effective catalyst for an extraction and oxidative desulfurization system

Abstract

Through a simple room-temperature process, different amounts of Keggin-type quaternary ammonium silicotungstate were successfully encapsulated into the metal–organic framework (MOF) material ZIF-67. The catalysts were characterized using Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and BET analysis. An extraction and catalytic oxidation desulfurization system was studied using H2O2 as an oxidant and a deep eutectic solvent (DES) as an extractant. Using the 43.06%-SiW12@ZIF-67 composite under optimal reaction conditions, DBT present in a model oil could be deeply and effectively removed. The catalyst was reused 6 times, and the desulfurization rate still exceeded 90%. Finally, a possible desulfurization mechanism is proposed.

Graphical abstract: Silicotungstate@ZIF-67 as an effective catalyst for an extraction and oxidative desulfurization system

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Article information

Article type
Paper
Submitted
18 Sep 2024
Accepted
23 Oct 2024
First published
18 Nov 2024
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2024,14, 36622-36632

Silicotungstate@ZIF-67 as an effective catalyst for an extraction and oxidative desulfurization system

L. Xu, Q. Tong and B. Hu, RSC Adv., 2024, 14, 36622 DOI: 10.1039/D4RA06736C

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