Synthesis of Oxygen-Containing Precursors of Aviation Fuel via Carbonylation of the Aqueous Bio-oil Fraction Followed by C–C Coupling

• Published in: ACS sustainable chemistry & engineering Vol. 10; no. 33; pp. 11030 - 11040
• Main Authors: Sun, Jiayuan, Shao, Shanshan, Hu, Xinggang, Li, Xiaohua, Zhang, Huiyan
• Format: Journal Article
• Language: English
• Published: American Chemical Society 22.08.2022
• Subjects: Aqueous bio-oil; Carbonylation; Coupling; Ketones; Aldehydes
• ISSN: 2168-0485; 2168-0485
• DOI: 10.1021/acssuschemeng.2c03379

The aqueous fraction of bio-oil from biomass fast pyrolysis mainly contains low-molecular-weight oxygenates such as carboxylic acids, ketones, aldehydes, phenols, and furans. In this study, the full components of aqueous bio-oil are directionally converted into carbonyl groups such as aldehydes and ketones, and then the oxygen-containing precursors of aviation fuel are prepared through coupling, focusing on exploring the mechanism of carbonylation and C–C coupling. Studies have revealed that propionic acid, furfural, and phenol can be directionally converted into ketones, in which reaction 3-pentanone, cyclopentanone, and cyclohexanone were formed via ketonization and hydrogenation in the aqueous phase. Then the two components of 3-pentanone, cyclopentanone, cyclohexanone, acetone, and acetaldehyde were subjected to aldol condensation to explore the C–C coupling mechanism in the preparation of the C7–C18 precursor of aviation fuel. The mechanism in the high-quality utilization of all components of the aqueous phase bio-oil fraction was explored, which was favorable for the synthesis of biomass-based aviation fuel.