Mo-modified hierarchical FAU zeolite: A catalyst-adsorbent for oxidative desulfurization of fuel oil

• Published in: Journal of solid state chemistry Vol. 312; p. 123218
• Main Authors: Koohsaryan, Esmat, Anbia, Mansoor, Heydar, Kourosh Tabar
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.08.2022
• Subjects: Desulfurization; Faujasite; Hierarchical; Oxidative; Zeolite; Hierarchical; Desulfurization; Oxidative; Zeolite; Faujasite
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2022.123218

In this study, highly crystalline hierarchical FAU zeolite was prepared and activated by MoO3 (Meso-Mo-FAU) for oxidative desulfurization (ODS) of fuel oils. Various characterization techniques such as XRD, SEM, TEM, NH3-TPD, TGA/DTA, EDS mapping, FT-IR and N2 sorption were employed to identify the structural properties of the catalyst and supposed mechanism of the ODS process. The effects of different parameters on the efficiency of the ODS system were examined. The results revealed that Meso-Mo-FAU with 19 ​wt.% molybdenum exhibited high catalytic activity at 70 ​°C. Moreover, the structural stability and reusability of the catalyst were conveniently investigated. Hot filtration test confirmed the spent catalyst after six ODS cycles had a robust heterogeneous nature due to no leaching of Mo species into the reaction medium. Furthermore, 99.83% ODS efficiency for real gasoline made an impressive view of this desulfurization system, including catalyst-adsorbent Meso-Mo-FAU, for industrial application. Mo-activated hierarchical FAU zeolite played a role of catalyst-adsorbent for the removal of organosulfur compounds in an oxidative desulfurization system. [Display omitted] •Hierarchical MoO3-FAU zeolitic catalyst (Meso-Mo-FAU) was easily synthesized.•The capability of the catalyst in the ODS of organosulfur compounds was examined.•Zeolite with 19 ​wt.% Mo was identified as a catalyst-adsorbent in the ODS process.•The catalyst had heterogeneous nature as no Mo leaching into the reaction medium.