The effect of SBA-15 doping with NbVOx and TaVOx on the extractive catalytic oxidative desulfurization of dibenzothiophene

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-03-08 DOI:10.1016/j.micromeso.2025.113592

Katarzyna Stawicka, Julia Gajewska, Maria Ziolek, Maciej Trejda

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Abstract

Unsupported NbVO_x and TaVO_x mixed oxides as well as materials based on SBA-15 silica support were prepared, characterized and applied as catalysts for extractive catalytic oxidative desulfurization (ECODS) of dibenzothiophene (DBT). Properties of the materials obtained and the role of active centers and mesoporous support in the catalytic process were examined by low-temperature nitrogen physisorption, XRD, SEM-EDS, XPS, UV–Vis, chemisorption of pyridine combined with FT-IR spectroscopy as well as by test reactions, i.e. dehydration and dehydrogenation of 2-propanol and cyclization and dehydration of 2,5-hexanedione. The highest effectiveness of DBT removal from the oil phase, reaching up to 98 % within 15 min at 60 °C was shown by the supported materials prepared by impregnation method. The superior efficiency of DBT removal achieved for niobium containing samples could be related to its ability to interact with hydrogen peroxide towards the formation of reactive oxygen species.

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.