In-situ construction of spherical N-doped carbon loaded with catalytic tungsten semicarbide nanoparticles for highly efficient sulfur removal from fuel oils

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2025-03-16 DOI:10.1016/j.apt.2025.104838

Xu Li, Fei Wang, Li Yu, Rui Liu, Weizhou Jiao, Ruixin Wang

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Abstract

Recently, transition-metal carbides (TMCs) have been developed as good catalyst candidates for oxidation desulfurization (ODS) reactions. However, improving their stability in strong oxidizing media remains a challenge. Herein, a W₂C catalyst protected by spherical N-doped carbon was constructed in-situ through a facile one-step thermal annealing process using phosphotungstic acid and zinc phthalocyanine microsphere (ZnPcMS) as the W and carbon sources, respectively. During annealing, the spherical N-doped carbon matrix (SNC) was simultaneously derived from ZnPcMS and combined closely with the in-situ formed W₂C, preventing W₂C from oxidation. The W₂C/SNC catalyst system, when combined with H₂O₂ as the oxidant, exhibits remarkable ODS performance. Desulfurization of model fuel oils can be achieved with 100 % efficiency within 25 min with a small H₂O₂ to S molar ratio of 3. Moreover, W₂C/SNC possesses superior reusability. A non-free radical oxidation mechanism is suggested for the ODS reaction based on radical scavenging tests. The as-prepared W₂C/SNC microspheres could serve as potential effective ODS catalysts.

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)