Hydrodeoxygenation of guaiacol as a model compound of lignin-derived pyrolysis bio-oil over zirconia-supported Rh catalyst: Process optimization and reaction kinetics

He, Yifeng; Bie, Yuwei; Lehtonen, Juha; Liu, Ronghou; Cai, Junmeng

doi:10.1016/j.fuel.2018.11.103

Cited by 58 publications

(23 citation statements)

References 45 publications

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“…An alternative but less favored pathway involves rearrangement to produce 1-methyl-1,2-cyclohexanediol without loss of oxygen [56]. Reports in the guaiacol HDO literature [57] postulate 1-methyl-1,2-cyclohexanediol as an intermediate in the reaction towards cyclohexanone and cyclohexanol, but results in Table 4 suggest that phenol is a more likely intermediate in this case as its selectivity is seen to decrease when catalytic activity is high. Full deoxygenation to cyclohexane was not observed.…”

Section: In-situ Hydrogenation Of Guaiacol With the Ni-based Alumina-mentioning

confidence: 99%

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

et al. 2020

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Biomass-derived liquids, such as bio-oil obtained by fast pyrolysis, can be a valuable source of fuels and chemicals. However, these liquids have high oxygen and water content, needing further upgrading typically involving hydrotreating using H2 at high pressure and temperature. The harsh reaction conditions and use of expensive H2 have hindered the progress of this technology and led to the search for alternative processes. In this work, hydrogenation in aqueous phase is investigated using in-situ produced hydrogen from reforming of glycerol, a low-value by-product from biodiesel production, over Ni-based catalysts. Guaiacol was selected as a bio-oil model compound and high conversion (95%) to phenol and aromatic ring hydrogenation products was obtained over Ni/γ-Al2O3 at 250 °C and 2-h reaction time. Seventy percent selectivity to cyclohexanol and cyclohexanone was achieved at this condition. Hydrogenation capacity of P and Mo modified Ni/γ-Al2O3 was inhibited because more hydrogen undergoes methanation, while Cu showed a good performance in suppressing methane formation. These results demonstrate the feasibility of coupling aqueous phase reforming of glycerol with bio-oil hydrogenation, enabling the reaction to be carried out at lower temperatures and pressures and without the need for molecular H2.

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Section: In-situ Hydrogenation Of Guaiacol With the Ni-based Alumina-mentioning

confidence: 99%

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

et al. 2020

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“…Also, we aimed to study how the impregnation of different metals on the Mo catalyst can influence the rates of different reactions in the HDO of PG. There are several literature studies reported for the kinetics for hydrodeoxygenation of phenolic model compounds over zirconia-supported Rh catalysts, 52 Pt, and Ir-modified bifunctional catalysts, 9 carbon-supported metal catalysts, 12 and Ni promoted sulfated zirconia on SBA-15. 8 However, studies of reaction behavior using sulfided catalysts for hydrodeoxygenation of phenolics are less frequent.…”

Section: Modeling the Reaction Pathways For Hydrodeoxygenation Of 4prmentioning

confidence: 99%

Role of transition metals on MoS₂-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

Cheah

Salam

Arora

et al. 2021

Sustainable Energy Fuels

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“…Pyrolysis of lignin is the thermal depolymerization of organic materials in an oxygen-free environment in a temperature range of 300-900°C [6][7][8]. During the thermal decomposition process, hemicellulose, cellulose, and lignin undergo different reactions, leading to a three-stage reaction: moisture removal, main depolymerization, and biochar formation [9].…”

Section: Fast Pyrolysis Of Lignin For Production Of Aromatic Hydrocarmentioning

confidence: 99%

A Study on Pyrolysis of Lignin over Mesoporous Materials

Rabie¹,

Abouelela²

2020

Recent Advances in Pyrolysis

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The aromatics have widespread uses across the chemical industries. Where, the monocyclic aromatics (e.g. BTX) and phenolics compounds are important basic raw materials for several industrial petrochemical processes such as synthetic polymers, detergents, biocides, resins, explosives, etc. Traditional production of these valuable chemicals has been dependent on fossil resources for more than half a century. So, it requires strategies for alternative chemical production from renewable sources especially from nonedible biomass. This chapter presents a review of the recent literature on the fast pyrolysis process for the production of aromatic hydrocarbons using mesoporous catalysts. We focus on the factors that can enhance the yield of aromatics and the lifetime of the catalyst used. Background information on catalyst deactivation during the pyrolysis process was described. The role of mesoporous catalyst's acidity and textural and topological properties of lignin to aromatics conversion was also discussed in detail.

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Hydrodeoxygenation of guaiacol as a model compound of lignin-derived pyrolysis bio-oil over zirconia-supported Rh catalyst: Process optimization and reaction kinetics

Cited by 58 publications

References 45 publications

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

Role of transition metals on MoS₂-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

A Study on Pyrolysis of Lignin over Mesoporous Materials

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Hydrodeoxygenation of guaiacol as a model compound of lignin-derived pyrolysis bio-oil over zirconia-supported Rh catalyst: Process optimization and reaction kinetics

Cited by 58 publications

References 45 publications

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

Role of transition metals on MoS2-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

A Study on Pyrolysis of Lignin over Mesoporous Materials

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Role of transition metals on MoS₂-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol