Refinery approach of bio-oils derived from fast pyrolysis of lignin to jet fuel range hydrocarbons: Reaction network development for catalytic conversion of cyclohexanone

•Catalytic upgrading of lignin-derived bio-oil into the jet and diesel fuel range hydrocarbons is studied.•A biorefinery approach for catalytic upgrading of bio-oil is proposed.•The kinetic assessment of catalytic hydro-upgrading cyclohexanone is performed.•One of the most detailed quantitative char...

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Bibliographic Details
Published in:Chemical engineering research & design 2017-05, Vol.121, p.393-406
Main Authors: Saidi, Majid, Jahangiri, Alireza
Format: Article
Language:English
Subjects:
Activation energy
Aluminum oxide
Benzene
Bio-oil
Catalytic converters
Catalytic upgrading
Chemical reactions
Computer networks
Conversion
Coupling
Cyclohexanone
Cyclohexene
Dehydration
Dehydrogenation
Diesel fuels
Hydrocarbons
Hydrodeoxygenation
Jet engine fuels
Kinetics
Lignin
Nuclear fuels
Pyrolysis
Rate constants
Refineries
Studies
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Summary:•Catalytic upgrading of lignin-derived bio-oil into the jet and diesel fuel range hydrocarbons is studied.•A biorefinery approach for catalytic upgrading of bio-oil is proposed.•The kinetic assessment of catalytic hydro-upgrading cyclohexanone is performed.•One of the most detailed quantitative characterizations of catalytic upgrading is presented.•Reaction network of cyclohexanone upgrading is developed. This study demonstrated that the bio-oil derived from fast pyrolysis of lignin was excellent candidate to be converted into the jet and diesel fuel range hydrocarbons by catalytic upgrading process. This research addresses specifically the kinetic and mechanism of cyclohexanone conversion using sulfided CoMo/γ-Al2O3 catalyst in a fixed-bed flow reactor. The main routes of cyclohexanone upgrading included hydrodeoxygenations (HDO), dehydrogenation, hydrogenation and coupling. The selectivity-conversion analyses at different operating condition indicate that benzene, cyclohexene, phenol, and 2-cyclohexen-1-one formed as primary products and the other main products, 2-methylphenol, cyclohexylbenzene, biphenyl, 2-phenylphenol, 2-cyclohexylcyclohexan-1-one, 2-cyclohexylidenecyclohexane-1-one and 2-cyclohexylphenol appeared as non-primary products. An approximate reaction network and a first order kinetic model are developed to determine kinetic parameters. Kinetic investigations indicate that among the various reactions on sulfided CoMo/Al2O3, HDO is characterized by the highest rate and that selectivities for oxygen removal are favored by operation at higher temperatures and pressures. The apparent activation energy for the HDO reaction that leads to benzene formation is approximately 35.6kJ/mol; coupling is the reaction class characterized by the highest apparent activation energy. The pseudo-first-order rate constants for formation of the main products of cyclohexanone conversion decrease in the following order: benzene >2-cyclohexylidenecyclohexane-1-one>cyclohexylbenzene>2-cyclohexen-1-one>2-phenylphenol>phenol>cyclohexene>2-cyclohexylphenol>2-methylphenol>2-cyclohexylcyclohexan-1-one>biphenyl.
ISSN:0263-8762
1744-3563
DOI:10.1016/j.cherd.2017.03.029