Hydrodeoxygenation of guaiacol via in situ H2 generated through a water gas shift reaction over dispersed NiMoS catalysts from oil-soluble precursors: Tuning the selectivity towards cyclohexene

Вутолкина, А. В.; Baygildin, I.G.; Glotov, Aleksandr; Pimerzin, Aleksey A.; Akopyan, A. V.; Maximov, A. L.; Караханов, Э. А.

doi:10.1016/j.apcatb.2022.121403

Cited by 41 publications

(4 citation statements)

References 58 publications

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“…At 380 °C, cyclohexene was identified among the reaction products, which was an intermediate product of the phenol conversion to cyclohexane. It could be formed by the hydrogenation of benzene or the deoxygenation of cyclohexanol. , However, neither benzene nor cyclohexanol was detected. Also, at temperatures of 340–380 °C, toluene was found.…”

Section: Resultsmentioning

confidence: 99%

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Bulk Molybdenum and Tungsten Phosphides for Selective Phenol Production from Guaiacol

et al. 2022

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Bulk MoP and WP were investigated and compared in guaiacol hydrodeoxygenation to phenol. The catalysts obtained were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and temperature-programmed desorption of NH 3 (NH 3 -TPD) analyses. MoP was shown to be more active than WP. However, WP was more selective in phenol production. Guaiacol conversion using MoP was 90−98%. The highest selectivity for phenol was 66% (340 °C). By increasing the temperature to 380 °C, phenol selectivity decreased to 31%, while selectivity for cyclohexane increased to 29%. Thus, MoP was active not only in hydrodeoxygenation but also in hydrogenation. Guaiacol conversion over WP was 53− 90%. The highest selectivity for phenol was 84% (380 °C). Hydrogenation products were also detected but with low selectivity. Thus, WP was active in the partial hydrodeoxygenation of guaiacol and was more suitable for the selective production of phenol than MoP. It was shown that after a 30 h recycling test, the activity of MoP did not decrease (1st and 5th cycle conversion value was 91%), while the activity of WP reduced (1st and 5th cycle conversion values were 81 and 64%, respectively). However, the activity of both catalysts at average conversion values decreased. Selectivity for phenol remained unaltered over both catalysts. It was supposed that catalyst activity decreased due to partial destruction of the crystalline phosphide phase and the surface phosphide oxidation to phosphate.

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Section: Resultsmentioning

confidence: 99%

“…It could be formed by the hydrogenation of benzene or the deoxygenation of cyclohexanol. 47,48 However, neither benzene nor cyclohexanol was detected. Also, at temperatures of 340− 380 °C, toluene was found.…”

Section: Catalytic Activitymentioning

confidence: 99%

Bulk Molybdenum and Tungsten Phosphides for Selective Phenol Production from Guaiacol

et al. 2022

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“…Water functions not merely as a solvent for the reforming of functional groups but also serves as an intrinsic source of active hydrogen to meet the reaction's hydrogen demand. [142] Fan et al investigated the role of water as a proton donor for hydrogen in the photocatalytic cleavage of C β À O bonds. [104] This role was substantiated by isotope labeling studies and kinetic isotope effect assessments.…”

Section: Hydrogenation/hydrodeoxygenation Of Monomeric Model Compoundsmentioning

confidence: 99%

“…Water functions not merely as a solvent for the reforming of functional groups but also serves as an intrinsic source of active hydrogen to meet the reaction's hydrogen demand [142] . Fan et al.…”

Section: Hydrogen Transfer Lignin Refinerymentioning

confidence: 99%

Hydrogen‐transfer strategy in lignin refinery: Towards sustainable and versatile value‐added biochemicals

Li,

Liu,

Tang

et al. 2024

ChemSusChem

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Lignin, the most prevalent natural source of polyphenols on Earth, offers substantial possibilities for the conversion into aromatic compounds, which is critical for attaining sustainability and carbon neutrality. The hydrogen‐transfer method has garnered significant interest owing to its environmental compatibility and economic viability. The efficacy of this approach is contingent upon the careful selection of catalytic and hydrogen‐donating systems that decisively affect the yield and selectivity of the monomeric products resulting from lignin degradation. This paper highlights the hydrogen‐transfer technique in lignin refinery, with a specific focus on the influence of hydrogen donors on the depolymerization pathways of lignin. It delineates the correlation between the structure and activity of catalytic hydrogen‐transfer arrangements and the gamut of lignin‐derived biochemicals, utilizing data from lignin model compounds, separated lignin, and lignocellulosic biomass. Additionally, the paper delves into the advantages and future directions of employing the hydrogen‐transfer approach for lignin conversion. In essence, this concept investigation illuminates the efficacy of the hydrogen‐transfer paradigm in lignin valorization, offering key insights and strategic directives to maximize lignin's value sustainably.

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Current Technological Status and Future Prospect of Biojet Fuel Production

Yadav,

Dixit,

Sharma

2024

Clean Energy Production Technologies

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Hydrodeoxygenation of guaiacol via in situ H2 generated through a water gas shift reaction over dispersed NiMoS catalysts from oil-soluble precursors: Tuning the selectivity towards cyclohexene

Cited by 41 publications

References 58 publications

Bulk Molybdenum and Tungsten Phosphides for Selective Phenol Production from Guaiacol

Bulk Molybdenum and Tungsten Phosphides for Selective Phenol Production from Guaiacol

Hydrogen‐transfer strategy in lignin refinery: Towards sustainable and versatile value‐added biochemicals

Current Technological Status and Future Prospect of Biojet Fuel Production

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