Effect of composition and preparation of supported MoO3 catalysts for anisole hydrodeoxygenation

Ranga, Chanakya; Lødeng, Rune; Alexiadis, Vaios; Rajkhowa, Tapas; Bjørkan, Hilde; Chytil, Svatopluk; Svenum, Ingeborg-Helene; Walmsley, John C.; Detavernier, Christophe; Poelman, Hilde; Voort, Pascal Van Der; Thybaut, Joris

doi:10.1016/j.cej.2017.10.090

Cited by 88 publications

(45 citation statements)

References 76 publications

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“…During anisole upgrading, two main reaction pathways were observed for deoxygenation, including (a) direct deoxygenation via HDO of the C aromatic O bond to form benzene and methanol and (b) indirect deoxygenation via hydrogenolysis of the C methoxy O bond to produce phenol and methane, accompanied with deoxygenation of phenol to benzene and H 2 O. Based on selectivity‐conversion results and as confirmed by related studies, 40‐42 the bond breaking of the C methyl O is faster than the scission of the C aromatic O bond; therefore, it can be concluded that benzene formation via the latter pathway is the dominant route. Moreover, in comparison to hydrogenolysis, hydrodeoxygenation reaction is a kinetically slower reaction.…”

Section: Resultsmentioning

confidence: 78%

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al ₂ O ₃ catalyst: Reaction network development and kinetic study of anisole upgrading

Saidi

Moradi

2021

Int J Energy Res

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Kinetic of anisole upgrading as a model compound of lignin-derived pyrolysis bio-oil to jet-grade fuels via catalytic hydrotreatment process has been investigated. Hydrodeoxygenation (HDO) process has been performed in a fixed-bed tubular reactor at operating temperature of 573 to 723 K, space velocity of 3 to 120 (anisole weight)/(catalyst weight × h), and hydrogen pressure of 8 bar.Benzene formation through demethoxylation reaction of anisole was identified to be the primary reaction route in contrast to demethylation, alkylation, and transalkylation reaction classes, which are more dominant for synthesized Cu/γ-Al 2 O 3 catalyst. Benzene is formed as the primary product through HDO of phenol assigning the lowest activation energy of 1.18 kJ/mol. Toluene and hexamethylbenzene are derived from alkylation reaction of benzene. Phenol is produced rapidly with highest selectivity among different products as the primary product via hydrogenolysis reaction. According to the kinetic data, phenol formation possesses the highest activation energy of about 59 kJ/mol. Moreover, 2-methylphenol and other phenol-derivatives are produced from alkylation and transalkylation reactions of phenol. The developed comprehensive quantitative reaction network for anisole catalytic hydrotreatment over Cu/γ-Al 2 O 3 is in appropriate agreement with previous studies.

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Section: Resultsmentioning

confidence: 78%

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al ₂ O ₃ catalyst: Reaction network development and kinetic study of anisole upgrading

Saidi

Moradi

2021

Int J Energy Res

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“…Oxides of Mo, Ni, W, V and other metals have HDO activity [179,[252][253][254][255][256][257][258][259]. It has been proposed that the HDO reaction mechanism for reducible oxide catalysts follows a reverse Mars-van Krevelen mechanism [252,253] (see Figure 20), similar to the mechanism for sulfides proposed by Romero et al [172] (see Figure 16).…”

Section: Oxidesmentioning

confidence: 54%

Transportation fuels from biomass fast pyrolysis, catalytic hydrodeoxygenation, and catalytic fast hydropyrolysis

Dabros¹,

Stummann²,

Høj³

et al. 2018

Progress in Energy and Combustion Science

228

147

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“…XRD analyses of the catalysts ( Figure S1, see Supplementary Materials ) revealed that both of the catalyst samples are rather amorphous though diffraction peaks corresponding to alumina could be detected in both samples (diffraction patterns 00-029-0063 and 01-077-0396 of the JCPDS-International Centre for Diffraction Data-2000 database, respectively). In the case of the Mo-Ni/γ-Al 2 O 3 catalyst, no further crystalline phases could be identified, which may be related to the low loadings of Mo and Ni in the catalyst, possibly resulting in Mo and Ni species being present in the form of particles with very low sizes or having amorphous structures, especially in the case of low Mo loadings [ 43 ]. Regarding the Mo-Co/γ-Al 2 O 3 catalyst, a crystalline phase corresponding to a mixed Cobalt Molybdenum Oxide, CoMoO 4 (JCPDS diffraction pattern 00-021-0868), could also be identified.…”

Section: Resultsmentioning

confidence: 99%

Renewable Hydrocarbon Production from Waste Cottonseed Oil Pyrolysis and Catalytic Upgrading of Vapors with Mo-Co and Mo-Ni Catalysts Supported on γ-Al2O3

et al. 2021

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In this work, the production of renewable hydrocarbons was explored by the means of waste cottonseed oil (WCSO) micropyrolysis at 500 °C. Catalytic upgrading of the pyrolysis vapors was studied using α-Al2O3, γ-Al2O3, Mo-Co/γ-Al2O3, and Mo-Ni/γ-Al2O3 catalysts. The oxygen removal efficiency was much lower in non-catalytic pyrolysis (18.0%), whilst γ-Al2O3 yielded a very high oxygen removal efficiency (91.8%), similar to that obtained with Mo-Co/γ-Al2O3 (92.8%) and higher than that attained with Mo-Ni/γ-Al2O3 (82.0%). Higher conversion yields into total renewable hydrocarbons were obtained with Mo-Co/γ-Al2O3 (61.9 wt.%) in comparison to Mo-Ni/γ-Al2O3 (46.6%). GC/MS analyses showed a relative chemical composition of 31.3, 86.4, and 92.6% of total renewable hydrocarbons and 58.7, 7.2, and 4.2% of oxygenated compounds for non-catalytic bio-oil (BOWCSO), BOMoNi and BOMoCo, respectively. The renewable hydrocarbons that were derived from BOMoNi and BOMoCo were mainly composed by olefins (35.3 and 33.4%), aromatics (31.4 and 28.9%), and paraffins (13.8 and 25.7%). The results revealed the catalysts’ effectiveness in FFA decarbonylation and decarboxylation, as evidenced by significant changes in the van Krevelen space, with the lowest O/C ratio values for BOMoCo and BOMoNi (O/C = 0–0.10) in relation to the BOWCSO (O/C = 0.10–0.20), and by a decrease in the presence of oxygenated compounds in the catalytic bio-oils.

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Effect of composition and preparation of supported MoO3 catalysts for anisole hydrodeoxygenation

Cited by 88 publications

References 76 publications

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al ₂ O ₃ catalyst: Reaction network development and kinetic study of anisole upgrading

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al ₂ O ₃ catalyst: Reaction network development and kinetic study of anisole upgrading

Transportation fuels from biomass fast pyrolysis, catalytic hydrodeoxygenation, and catalytic fast hydropyrolysis

Renewable Hydrocarbon Production from Waste Cottonseed Oil Pyrolysis and Catalytic Upgrading of Vapors with Mo-Co and Mo-Ni Catalysts Supported on γ-Al2O3

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Effect of composition and preparation of supported MoO3 catalysts for anisole hydrodeoxygenation

Cited by 88 publications

References 76 publications

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al 2 O 3 catalyst: Reaction network development and kinetic study of anisole upgrading

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al 2 O 3 catalyst: Reaction network development and kinetic study of anisole upgrading

Transportation fuels from biomass fast pyrolysis, catalytic hydrodeoxygenation, and catalytic fast hydropyrolysis

Renewable Hydrocarbon Production from Waste Cottonseed Oil Pyrolysis and Catalytic Upgrading of Vapors with Mo-Co and Mo-Ni Catalysts Supported on γ-Al2O3

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Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al ₂ O ₃ catalyst: Reaction network development and kinetic study of anisole upgrading

Catalytic hydrotreatment of lignin‐derived pyrolysis bio‐oils using Cu/γ‐Al ₂ O ₃ catalyst: Reaction network development and kinetic study of anisole upgrading