Hydrodeoxygenation of guaiacol using NiMo and CoMo catalysts supported on alumina modified with potassium

Mora-Vergara, Iván D.; Moscoso, Linney Hernández; Gaigneaux, Éric M.; Giraldo, Sonia A.; Medrano, Víctor Gabriel Baldovino

doi:10.1016/j.cattod.2017.07.015

Cited by 47 publications

(33 citation statements)

References 45 publications

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“…Note that alkali metals have been used as additives on other catalysts for selective hydrogenation of nitroarenes 36 or promotion to aromatic ring saturation. 37 Different from those reported ones, directly doping alkali metal on the Fe without graphene overlayers is not able to enhance the selectivity, instead the catalyst was almost completely deactivated. It suggests that the graphene overlayers, other than prevent Fe oxidation, must play another pivotal role to prevent the poison of surface Fe via a mediated Fe–alkali metal interaction, the reason of which remains unclear and subjects to further studies.…”

Section: Resultscontrasting

confidence: 60%

Surface engineering of earth-abundant Fe catalysts for selective hydrodeoxygenation of phenolics in liquid phase

et al. 2020

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Section: Resultscontrasting

confidence: 60%

Surface engineering of earth-abundant Fe catalysts for selective hydrodeoxygenation of phenolics in liquid phase

et al. 2020

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“…There was no reaction during the AQHDO of guaiacol on RRM. This clearly showed that the nickel catalyzed the production of the above compounds through hydrodeoxygenation, hydrogenation, ring saturation, and cyclohexane ring opening reactions …”

Section: Resultsmentioning

confidence: 94%

Aqueous Phase Synthesis of Hydrocarbons from Reactions of Guaiacol and Low Molecular Weight Oxygenates

Agblevor

Jahromi

2018

ChemCatChem

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Catalytic pyrolysis of lignocellulosic biomass generates water‐soluble low molecular weight oxygenates such as acetic acid, acetone, furfural, butanone, guaiacol, phenol and others in significant quantities that will affect the profitability of the biorefinery process. A new heterogeneous catalyst has been developed that catalyzes the reaction of carbonyl compounds with unsaturated ethers in aqueous medium to produce C6 to C15 hydrocarbons in a one‐pot synthesis. These reactions are called “carbonyl alkylations” because the carbonyl carbon chain was added to the aromatic ring and the oxygen was eliminated without loss of carbon. The C1 to C4 ketones and aldehydes produce alkylated benzenes while the C5 and higher carbonyl compounds alkylated the benzene ring and also opened the benzene ring to produce long chain internal alkene compounds. All the reactions occurred in the aqueous media at 300–350 °C on a supported nickel catalyst. The gaseous products included low molecular weight hydrocarbons such as methane, propane, butane, and pentane. Thus, it has been demonstrated for the first time that it is possible to produce a wide array of hydrocarbons from low molecular weight biomass derived oxygenates.

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“…The addition of small amounts of K to NiMo/Al 2 O 3 and CoMo/Al 2 O 3 sulfided catalysts resulted in an increase in the yields to the desired products and stronger resistance to coking. The selectivity shifting from demethylation and methyl substitution reactions to direct C Ar −OH bond cleavage and hydrogenation reactions was driven by the promoter effect . A brief overview of the reviewed literature on bimetallic systems is depicted in Table .…”

Section: Hydrodeoxygenation Using H2mentioning

confidence: 99%

Catalytic Upgrading of Biomass Model Compounds: Novel Approaches and Lessons Learnt from Traditional Hydrodeoxygenation – a Review

et al. 2019

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Catalytic hydrodeoxygenation (HDO) is a fundamental process for bio-resources upgrading to produce transportation fuels or added value chemicals. The bottleneck of this technology to be implemented at commercial scale is its dependence on high pressure hydrogen, an expensive resource which utilization also poses safety concerns. In this scenario, the development of hydrogen-free alternatives to facilitate oxygen removal in biomass derived compounds is a major challenge for catalysis science but at the same time it could revolutionize biomass processing technologies. In this review we have analysed several novel approaches, including catalytic transfer hydrogenation (CTH), combined reforming and hydrodeoxygenation, metal hydrolysis and subsequent hydrodeoxygenation along with non-thermal plasma (NTP) to avoid the supply of external H 2 . The knowledge accumulated from traditional HDO sets the grounds for catalysts and processes development among the hydrogen alternatives. In this sense, mechanistic aspects for HDO and the proposed alternatives are carefully analysed in this work. Biomass model compounds are selected aiming to provide an in-depth description of the different processes and stablish solid correlations catalysts composition-catalytic performance which can be further extrapolated to more complex biomass feedstocks. Moreover, the current challenges and research trends of novel hydrodeoxygenation strategies are also presented aiming to spark inspiration among the broad community of scientists working towards a low carbon society where bio-resources will play a major role. Figure 1. Three basic phenylpropane monomers: (1) p-coumaryl alcohol; (2) coniferyl alcohol; (3) sinapyl alcohol.

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Hydrodeoxygenation of guaiacol using NiMo and CoMo catalysts supported on alumina modified with potassium

Cited by 47 publications

References 45 publications

Surface engineering of earth-abundant Fe catalysts for selective hydrodeoxygenation of phenolics in liquid phase

Surface engineering of earth-abundant Fe catalysts for selective hydrodeoxygenation of phenolics in liquid phase

Aqueous Phase Synthesis of Hydrocarbons from Reactions of Guaiacol and Low Molecular Weight Oxygenates

Catalytic Upgrading of Biomass Model Compounds: Novel Approaches and Lessons Learnt from Traditional Hydrodeoxygenation – a Review

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