Efficient and rapid removal of thiophene sulfides from fuel using zirconia-loaded phosphotungstic acid.

Authors

Rui Liang, Yu Hu, YuFang Ye, Qing Wang

Published in

RSC advances. Volume 15. Issue 21. Pages 16532-16539. May 15, 2025. Epub May 19, 2025.

Abstract

In this study, a new type of composite was synthesized via the sol-gel method. The structure and properties of the composite were analyzed using X-ray diffraction, scanning electron microscopy, nitrogen isothermal adsorption and desorption tests, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Characterization results showed that phosphotungstic acid (PW₁₂) was successfully loaded on zirconium dioxide (ZrO₂). The oxidative desulfurization performance of 500 ppm dibenzothiophene (DBT) was studied with H₂O₂ as the oxidant and xPW₁₂/ZrO₂ as the catalyst. Under optimal conditions (T = 60 °C, O/S = 2 and m = 0.03 g), the desulfurization rate reached 97.85% within 20 min, and the activity did not decrease significantly after 8 cycles. The kinetics of the reaction was studied at different temperatures. Results showed that the oxidation rate conforms to quasi-first-order kinetics and the apparent activation energy is 23.32 kJ mol^-1. Therefore, the composite material is expected to be a catalyst for oxidative desulfurization.

PMID:
40391357
Bibliographic data and abstract were imported from PubMed on 20 May 2025.

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