Acidity modulation of Pt-supported catalyst enhances C-O bond cleavage over acetone hydrodeoxygenation

Strapasson, Guilherme B.; Sousa, Leonardo S.; Báfero, Gabriel B.; Leite, Davi S.; Moreno, Beatriz; Rodella, Cristiane B.; Zanchet, Daniela

doi:10.1016/j.apcatb.2023.122863

Cited by 8 publications

(2 citation statements)

References 69 publications

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“…Therefore, in addition to the direct interest in terms of biomass upgrading, the study of acetone HDO represents an attractive approach to probe the catalyst properties and to evaluate the presence of different catalytic sites and their role in the CÀ O, CÀ C, and CÀ H bonds activation and cleavage. [6][7][8] Reducible metal oxides have been called attention as a natural class of catalysts for biomass upgrading since they can promote the selective cleavage of CÀ O bonds through the reverse Mars-van-Krevelen mechanism on oxygen vacancies. [9,10] Among these metal oxides, MoO 3 is one the most studied systems.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO₃ during Acetone Hydrodeoxygenation

Báfero,

Strapasson,

Leite

et al. 2023

ChemCatChem

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Metal oxides have attracted attention as catalysts for various reduction and oxidation reactions due to their abundance, inexpensiveness, and the possibility of combining different catalytic sites (e. g., acid-base, redox, and oxygen vacancy sites). Previous results have demonstrated that metal oxides are promising candidates for the hydrodeoxygenation (HDO) reaction, one of the processes that aim to upgrade biomass-derived products by reducing their oxygen content. In this work, molybdenum oxide (MoO 3 ) was subjected to the acetone HDO reaction leading to new insights concerning the generation of molybdenum oxycarbides (MoO x C y ) on stream and their catalytic properties. The characteristics of the MoO x C y phase depended on the temperature and time on stream, affecting the balance of the different catalytic sites and the final products' distribution. The intrinsic correlation between the active sites -mainly Brønsted/Lewis acid sites (AS) and hydrogenation/hydrogenolysis sites (HS) -and the reaction pathways was discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO₃ during Acetone Hydrodeoxygenation

Báfero,

Strapasson,

Leite

et al. 2023

ChemCatChem

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“…Pyrolysis oil contains a large number of phenolic derivatives, such as phenol, cresol, anisole, and guaiacol, which are used as model compounds in the HDO studies [15,16]. In the HDO reaction, the C-O bond of the model molecule is cleaved to produce saturated or aromatic hydrocarbons [17,18]. In general, HDO of phenolic compounds occurs through two pathways: direct deoxygenation (DDO) and hydrogenation-deoxygenation (HYD) [19].…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Hydrogenation, Hydrodeoxygenation, and Hydrogenolysis of Anisole on Nickel Catalysts

Zhang,

Liu,

et al. 2023

Catalysts

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Hydrogenation stands out as one of the most promising techniques for converting biomass-derived molecules into valuable products. The expected products of upgrading biomass molecules include hydrocarbon, oxygenate, and methane. Ni-based catalysts have attracted considerable interest owing to their unique properties and relatively low cost. In this work, NiO prepared by the calcination and urea precipitation methods, namely NiO–C and NiO–U, is investigated for the hydrogenation of anisole. It is found that reaction temperature exerts a significant influence on the hydrogenation pathways. At 150 °C, C–reduced NiO proves more inclined towards hydrogenation, while U–reduced NiO demonstrates a tendency for hydrodeoxygenation (HDO). Moreover, as the temperature rises, both nickel catalysts change the reaction route to hydrogenolysis and eventually only produce methane at 300 °C, whereas metallic Ni is formed as the catalytic active phase. In situ FTIR experiments suggest the hydrogenolysis pathway and the formation of methane. This work investigates a route to produce methane from biomass molecules.

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Highly dispersed Pd nanoparticles in situ reduced and stabilized by nitrogen-alkali lignin-doped phenolic nanospheres and their application in vanillin hydrodeoxygenation

Gu,

Qin,

Wei

et al. 2024

Front. Chem. Sci. Eng.

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Acidity modulation of Pt-supported catalyst enhances C-O bond cleavage over acetone hydrodeoxygenation

Cited by 8 publications

References 69 publications

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO₃ during Acetone Hydrodeoxygenation

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO₃ during Acetone Hydrodeoxygenation

Temperature-Dependent Hydrogenation, Hydrodeoxygenation, and Hydrogenolysis of Anisole on Nickel Catalysts

Highly dispersed Pd nanoparticles in situ reduced and stabilized by nitrogen-alkali lignin-doped phenolic nanospheres and their application in vanillin hydrodeoxygenation

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Acidity modulation of Pt-supported catalyst enhances C-O bond cleavage over acetone hydrodeoxygenation

Cited by 8 publications

References 69 publications

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO3 during Acetone Hydrodeoxygenation

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO3 during Acetone Hydrodeoxygenation

Temperature-Dependent Hydrogenation, Hydrodeoxygenation, and Hydrogenolysis of Anisole on Nickel Catalysts

Highly dispersed Pd nanoparticles in situ reduced and stabilized by nitrogen-alkali lignin-doped phenolic nanospheres and their application in vanillin hydrodeoxygenation

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Product

Resources

About

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO₃ during Acetone Hydrodeoxygenation

Enhanced Brønsted Acidity and Hydrogenating Sites Generated on MoO₃ during Acetone Hydrodeoxygenation