MCM-41-supported vanadium catalysts structurally modified with Al or Zr for thiophene hydrodesulfurization

IF 0.125

Applied Petrochemical Research Pub Date : 2019-04-03 DOI:10.1007/s13203-019-0227-z

Yelisbeth Escalante, Franklin J. Méndez, Yraida Díaz, Marcel Inojosa, Myloa Morgado, Miguel Delgado, Ernesto Bastardo-González, Joaquín L. Brito

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引用次数: 11

Abstract

Vanadium catalysts supported on Al(Zr)-MCM-41-type materials were prepared by impregnation. Textural and structural properties, elemental composition and electronic structure were determined by N₂ physisorption, small-angle XRD, SEM–EDX and UV–vis DRS, respectively. Al-containing materials showed mostly of Al framework and a small fraction of Al extra-framework species. Zr-containing materials presented almost exclusively small clusters of Zr_xO_y covering the MCM-41 matrix. Vanadium catalysts, showed the presence of isolated V⁵⁺ species and to a lesser extent polymeric chains likely as small crystallites of V₂O₅. The catalytic results revealed that VAlM30 catalyst, characterized by a Si/Al atomic ratio of 30, was the most active in thiophene hydrodesulfurization, which could be associated to better textural properties and high dispersion of the vanadium species.

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Al或Zr改性mcm -41负载型钒催化剂用于噻吩加氢脱硫

采用浸渍法制备了Al(Zr)- mcm -41型载体钒催化剂。采用N2物理吸附、小角XRD、SEM-EDX和UV-vis DRS分别测定了材料的织构和结构性能、元素组成和电子结构。含铝材料以Al骨架为主，以少量Al外骨架为主。含锆材料几乎完全呈现覆盖MCM-41基体的小团簇ZrxOy。钒催化剂显示出孤立的V5+物种的存在，在较小程度上，聚合链可能是V2O5的小晶体。催化结果表明，Si/Al原子比为30的VAlM30催化剂在噻吩加氢脱硫中活性最高，这可能与较好的结构性能和较高的钒分散性有关。

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来源期刊

Applied Petrochemical Research ENGINEERING, CHEMICAL-

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0.00%

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审稿时长

13 weeks

期刊介绍： Applied Petrochemical Research is a quarterly Open Access journal supported by King Abdulaziz City for Science and Technology and all the manuscripts are single-blind peer-reviewed for scientific quality and acceptance. The article-processing charge (APC) for all authors is covered by KACST. Publication of original applied research on all aspects of the petrochemical industry focusing on new and smart technologies that allow the production of value-added end products in a cost-effective way. Topics of interest include: • Review of Petrochemical Processes • Reaction Engineering • Design • Catalysis • Pilot Plant and Production Studies • Synthesis As Applied to any of the following aspects of Petrochemical Research: -Feedstock Petrochemicals: Ethylene Production, Propylene Production, Butylene Production, Aromatics Production (Benzene, Toluene, Xylene etc...), Oxygenate Production (Methanol, Ethanol, Propanol etc…), Paraffins and Waxes. -Petrochemical Refining Processes: Cracking (Steam Cracking, Hydrocracking, Fluid Catalytic Cracking), Reforming and Aromatisation, Isomerisation Processes, Dimerization and Polymerization, Aromatic Alkylation, Oxidation Processes, Hydrogenation and Dehydrogenation. -Products: Polymers and Plastics, Lubricants, Speciality and Fine Chemicals (Adhesives, Fragrances, Flavours etc...), Fibres, Pharmaceuticals.