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Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones
Author(s) -
Wang Jundong,
Jabbour Michael,
Abdelouahed Lokmane,
Mezghich Soumaya,
Estel Lionel,
Thomas Karine,
Taouk Bechara
Publication year - 2021
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23909
Subject(s) - hydrodeoxygenation , chemistry , acetone , ketone , catalysis , benzene , toluene , organic chemistry , aldol condensation , acetaldehyde , selectivity , methyl isobutyl ketone , butanone , ethanol , solvent
The complexity of composition of bio‐oil from biomass makes it difficult to produce upgraded bio‐oil via hydrodeoxygenation. In this paper, acetone is thus considered as a model compound of the ketones family abundant in pyrolysis bio‐oil. Results showed that high conversion rates of acetone between 86.6% and 91.9% were observed with the use of HZSM‐5, 5% Ni 2 P/HZSM‐5, and 10% Ni2P/HZSM‐5 catalysts. In most cases, CO 2 , C 2 H 6 , C 3 H 6 , and C 3 H 8 were the dominant non‐condensable gas products. For liquid phase, the selectivity was evaluated for different catalysts relative to ethanol, acetaldehyde, and aromatic hydrocarbons. A lower temperature favoured the formation of acetaldehyde and methyl isobutyl ketone with the 5% Ni 2 P/HZSM‐5 catalyst, while higher temperatures increased the proportion of aromatic hydrocarbons. The principal influencing parameters of acetone HDO were temperature and contact time followed by reaction pressure and H 2 partial pressure. Optimal conditions give a selectivity of 49% of aromatics (benzene, toluene, and xylene) with the use of the 5% Ni 2 P/HZSM‐5 catalyst. The pathway of the main reactions of acetone HDO was also proposed. MIK and aromatic hydrocarbons were formed by a multiple step aldol condensation reaction of acetone molecules followed by further hydrogenation.