Abstract
Conversion of lignin into value-added chemicals is attracting growing attention due to the depletion of fossil fuels and the abundant resource of lignin. In this study, hydrothermal conversion of a model compound of lignin, catechol, into value-added four-carbon dicarboxylic acids (C4-DCAs), such as tartaric (HOOC–CH(OH)–CH(OH)–COOH), malic (HOOC–CH2–CH(OH)–COOH), and fumaric (HOOC—CH═CH—COOH) acids was investigated. The yield of total C4-DCAs can reach as high as 41.0%, and alkali played a key role in not only promoting the production but also avoiding the decomposition of C4-DCAs. The reaction mechanism of hydrothermal conversion catechol into C4-DCAs showed that catechol is first oxidized to o-quinone, which is then attacked by the hydroxyl radical (OH•) or the hydroperoxyl anion (HO2–) via conjugate addition to decompose into C4-DCAs. This result is helpful to facilitate studies for developing a new, green, and sustainable process to produce value-added C4-DCAs from lignin.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
