Zr supported on non-acidic sepiolite for the efficient one-pot transformation of furfural into γ-valerolactone

García, Adrián; Monti, Enrico; Ventimiglia, Alessia; Dimitratos, Nikolaos; Miguel, Pablo J.; López, Marı́a Luisa; Álvarez-Serrano, I.; Garcı́a, Tomás; Pico, María Pilar; Dejoz, Ana; Solsona, Benjamín

doi:10.1016/j.biombioe.2023.106730

Cited by 10 publications

(10 citation statements)

References 70 publications

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“…A maximum of 30% of GVL yield was obtained after 24 h. In the case of IPL, low yields were obtained, regardless of the reaction time. Then, it seems that using the Zr-containing catalysts, the conversion of FE into IPL could be the limiting step in the transformation of FF into GVL, as it was reported in other previous studies …”

Section: Resultssupporting

confidence: 55%

“…As it was demonstrated in previous studies carried out with sepiolite as a support, the presence of BAS was hardly detected even though GVL was formed . It indicates that a high proportion of BAS, although desirable, could not be strictly necessary to carry out the transformation of FF in GVL in one pot.…”

Section: Resultsmentioning

confidence: 73%

“…It indicates that a high proportion of BAS, although desirable, could not be strictly necessary to carry out the transformation of FF in GVL in one pot. Thus, the basicity of the sepiolite support could be beneficial to produce GVL in higher yields, avoiding the production of byproducts, as reported elsewhere. − …”

Section: Resultsmentioning

confidence: 76%

“…Then, it seems that using the Zr-containing catalysts, the conversion of FE into IPL could be the limiting step in the transformation of FF into GVL, as it was reported in other previous studies. 56 Using the physical mixture of the monometallic catalysts (10Zr/Sep +1Pt/Sep), the FE yield was high at short reaction times, but the maximum value was obtained at 1 h of reaction, reaching 65%. After this time, the yield decreased in favor of IPL and GVL.…”

Section: Batch Catalytic Resultsmentioning

confidence: 98%

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Promoter Effect of Pt on Zr Catalysts to Increase the Conversion of Furfural to γ-Valerolactone Using Batch and Continuous Flow Reactors: Influence of the Way of the Incorporation of the Pt Sites

García,

Saotta,

Miguel

et al. 2024

Energy Fuels

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The valorization of biomass and its transformation into fuels are highly interesting due to the abundance of biomass and its almost neutral carbon emissions. In this article, we show the production of γ-valerolactone (GVL), a valuable product, from furfural (FF), a compound that can be easily obtained from biomass. This FF to GVL transformation involves a catalytic cascade reaction with two hydrogenation steps. Pt and/or Zr supported on sepiolite catalysts have been prepared and tested in the FF transformation reaction. A physical mixture of a Zrbased and a Pt-based catalyst has reached a yield to GVL of ca. 50% after 16 h at 180 °C. This performance largely exceeds that obtained by each of the single Pt or single Zr metal catalysts independently, showing a strong synergistic effect. These data suggest that each metal (Pt and Zr) plays an important and complementary role in different reaction steps. Furthermore, the physical mixture appears to be much more efficient than bimetallic Pt/Zr catalysts synthesized with the same amount of metals. The role of the type of acidity and the oxidation state of the surface platinum species on the catalytic performance has been discussed. Moreover, this reaction has been carried out in batch and continuous flow reactors, and a comparative study between the two operation modes has been undertaken. A certain correlation between the catalytic results obtained by both operation modes has been found.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 76%

Section: Batch Catalytic Resultsmentioning

confidence: 98%

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Promoter Effect of Pt on Zr Catalysts to Increase the Conversion of Furfural to γ-Valerolactone Using Batch and Continuous Flow Reactors: Influence of the Way of the Incorporation of the Pt Sites

García,

Saotta,

Miguel

et al. 2024

Energy Fuels

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“…The cascade reaction of GVL prepared by FUR using alcohol as the hydrogen donor involves multiple reaction processes, such as aldehyde reduction, ring opening/rearrangement, carbonyl reduction, and internal esterification. Lewis acid sites (LAS) are responsible for the hydrogenation of FUR and LA/LAE, while the Brønsted acid site (BAS) is needed for ring opening and internal esterification. − Thereafter, the tandem reaction of FUR to GVL catalyzed by mixed catalysts attracted wide attention. ,− However, the active sites for catalyzing different steps (LAS catalyzed and BAS catalyzed) are located on independent catalysts, resulting in low activity and GVL yield. Thus, bifunctional catalysts with both LAS and BAS have been synthesized and applied to the FUR to GVL reaction.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Conversion of Furfural to Gamma-Valerolactone over Zr-SBA-15: Cooperation of Lewis and Brønsted Acidic Sites

Liu

Zhang

et al. 2023

ACS Appl. Nano Mater.

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A series of bifunctional Zr-SBA-15_x of varying molar Si/ Zr ratio x (15−730) with isolated Lewis and Brønsted acid sites were prepared by an in situ synthesis procedure and applied to the one-pot conversion of furfural (FUR) to gamma-valerolactone (GVL). These catalysts were detailed and characterized by XRF, XRD, N 2 physisorption, FTIR, SEM, TEM, NH 3 -TPD, and pyridine-DRIFT techniques. On all these Zr-SBA-15_x catalysts, the conversion of FUR was higher than 99%, while the GVL selectivity first increased and then decreased with decreasing x. A Zr-SBA-15_25 was identified as the best-performing catalyst, offering a 93.3% selectivity of GVL under optimized reaction conditions. The effects of reaction temperature, time, and solvent on catalytic performance were also investigated. Correlating the catalyst performance with the Brønsted acid site (BAS)/Lewis acid site (LAS) ratio uncovers that the balance between the LAS and the BAS would be the key to the higher catalytic performance. The possible reaction mechanism for the cascade conversion of FUR to GVL was proposed. Moreover, basic (lutidine and pyridine) additives were added, respectively, to the reaction solution to investigate their effects on catalytic performance, which provide a piece of evidence in support of the cooperative LAS−BAS bifunctional catalytic mechanism.

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A spherical AlPO4 supported WO3 catalyst for reductive etherification of furfural to Euro 95 standard gasoline fuel additives

Manimaran,

Pandurangan

2024

J Porous Mater

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Zr supported on non-acidic sepiolite for the efficient one-pot transformation of furfural into γ-valerolactone

Cited by 10 publications

References 70 publications

Promoter Effect of Pt on Zr Catalysts to Increase the Conversion of Furfural to γ-Valerolactone Using Batch and Continuous Flow Reactors: Influence of the Way of the Incorporation of the Pt Sites

Promoter Effect of Pt on Zr Catalysts to Increase the Conversion of Furfural to γ-Valerolactone Using Batch and Continuous Flow Reactors: Influence of the Way of the Incorporation of the Pt Sites

One-Pot Conversion of Furfural to Gamma-Valerolactone over Zr-SBA-15: Cooperation of Lewis and Brønsted Acidic Sites

A spherical AlPO4 supported WO3 catalyst for reductive etherification of furfural to Euro 95 standard gasoline fuel additives

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