A kinetic model of multi-step furfural hydrogenation over a Pd-TiO2 supported activated carbon catalyst

Pirmoradi, Maryam; Kastner, James R.

doi:10.1016/j.cej.2021.128693

Cited by 41 publications

(23 citation statements)

References 48 publications

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“…In Scheme 1 , the possible reaction pathways from FAL to CPO are depicted as well as the possible by-products formed during the hydrogenation reaction based on the literature and our experimental data [ 39 , 40 ]. The hydrogenative ring-rearrangement of FAL takes place in the following steps.…”

Section: Resultsmentioning

confidence: 99%

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Hydrogenative Ring-Rearrangement of Furfural to Cyclopentanone over Pd/UiO-66-NO2 with Tunable Missing-Linker Defects

Wang

Yang

et al. 2021

Molecules

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Upgrading furfural (FAL) to cyclopentanone (CPO) is of great importance for the synthesis of high-value chemicals and biomass utilization. The hydrogenative ring-rearrangement of FAL is catalyzed by metal-acid bifunctional catalysts. The Lewis acidity is a key factor in promoting the rearrangement of furan rings and achieving a high selectivity to CPO. In this work, highly dispersed Pd nanoparticles were successfully encapsulated into the cavities of a Zr based MOF, UiO-66-NO2, by impregnation using a double-solvent method (DSM) followed by H2 reduction. The obtained Pd/UiO-66-NO2 catalyst showed a significantly better catalytic performance in the aforementioned reaction than the Pd/UiO-66 catalyst due to the higher Lewis acidity of the support. Moreover, by using a thermal treatment. The Lewis acidity can be further increased through the creating of missing-linker defects. The resulting defective Pd/UiO-66-NO2 exhibited the highest CPO selectivity and FAL conversion of 96.6% and 98.9%, respectively. In addition, the catalyst was able to maintain a high activity and stability after four consecutive runs. The current study not only provides an efficient catalytic reaction system for the hydrogenative ring-rearrangement of furfural to cyclopentanone but also emphasizes the importance of defect sites.

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Section: Resultsmentioning

confidence: 99%

“… Possible reaction pathways for the hydrogenative ring-rearrangement of furfural to cyclopentanone [ 40 ]. …”

Section: Figures Scheme and Tablesmentioning

confidence: 99%

Hydrogenative Ring-Rearrangement of Furfural to Cyclopentanone over Pd/UiO-66-NO2 with Tunable Missing-Linker Defects

Wang

Yang

et al. 2021

Molecules

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“…Noble metals have been largely employed for the liquid-phase hydroconversion of biosourced molecules but they are costly, and their abundance is low. [8][9][10][11][12][13] Ideally, substitutes should be found among the more abundant and cheaper first-row transition metals. While cobalt-and copper-based systems have been tested as selective to FFA, but with issues of stability and deactivation, 2,4 nickel, in contrast, is known both for its high activity and its poor selectivity, as it catalyzes the hydrogenation of both oxygenated functions and aromatic rings, hydrodeoxygenation reactions, and decarbonylation reactions.…”

Section: Introductionmentioning

confidence: 99%

Probing the core and surface composition of nanoalloy to rationalize its selectivity: Study of Ni-Fe/SiO2 catalysts for liquid-phase hydrogenation

et al. 2022

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“…Biomass is the most widely available renewable resource in the world, − and selective hydrogenation of biomass-derived oxygenated compounds is an important way to achieve value-added utilization. , Furfural (FF), which has been industrially produced, is one of the important platform compounds that can be transformed into high value-added chemical products and fuels. , Furfuryl alcohol (FOL), as an important hydrogenation product of FF, is widely used in the production of synthetic resins, reaction solvents, and chemicals. Selective hydrogenation of FF is often accompanied by side reactions, so it is a challenge to achieve high selectivity for the preparation of FOL.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Metal Content Carbon-Based Catalyst for Efficient Hydrogenation of Furfural: The Regulatory Effect of Glycerol

Zhai

Chu

Sun

et al. 2022

ACS Appl. Mater. Interfaces

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The development of high-content non-noble metal nanocatalysts is important for multiphase catalysis applications. However, it is a challenge to solve the agglomeration in the preparation of high-content metal catalysts. In this paper, a carbon-based catalyst (Co@CN-G-600) with 71.28 wt % cobalt metal content was prepared using a new strategy of gas-phase carbon coating assisted by glycerol. The core of this strategy is to maintain the spacing of metallic cobalt by continuous replenishment of dissociated ligands during pyrolysis over gas-phase glycerol. This approach is also applicable to other non-noble metals. When Co@CN-G-600 was further used as a catalyst for the selective hydrogenation of furfural (FF) to prepare furfuryl alcohol (FOL), the yield of FOL was >99.9% under mild conditions of 80 °C, compared to only 8.23% catalytic yield at up to 130 °C for Co@CN-600 without glycerol. The excellent catalytic performance mainly lies in the fact that the introduction of glycerol modulates the size effect, electronic effect, and acidic site intensity of the high-content Co catalyst, which promotes the activation of FF and hydrogen. Meanwhile, the optimized specific surface area and pore structure by glycerol improve the accessibility of high-density active sites and promote more efficient mass transfer. In addition, the introduction of glycerol produced a graphitic carbon layer encapsulation structure relative to Co@CN-600, which substantially improved the cycling stability of the catalyst. This study resolves the paradox of high content and high dispersion of non-noble metal catalysts in the synthesis process and provides a general pathway and example for the preparation of stable high-content metal catalysts.

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A kinetic model of multi-step furfural hydrogenation over a Pd-TiO2 supported activated carbon catalyst

Cited by 41 publications

References 48 publications

Hydrogenative Ring-Rearrangement of Furfural to Cyclopentanone over Pd/UiO-66-NO2 with Tunable Missing-Linker Defects

Hydrogenative Ring-Rearrangement of Furfural to Cyclopentanone over Pd/UiO-66-NO2 with Tunable Missing-Linker Defects

Probing the core and surface composition of nanoalloy to rationalize its selectivity: Study of Ni-Fe/SiO2 catalysts for liquid-phase hydrogenation

Ultrahigh Metal Content Carbon-Based Catalyst for Efficient Hydrogenation of Furfural: The Regulatory Effect of Glycerol

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