Homogeneously catalyzed depolymerization of lignin from organosolv medium: Characterization, optimization, and minimization of coke formation. (4th April 2021)

• Record Type: Journal Article
• Authors: Süss, Raphaela; Kamm, Birgit; Arnezeder, David; Zeilerbauer, Lukas; Paulik, Christian
• Is Part Of: Canadian journal of chemical engineering. Volume 100(2022)supplement 1
• Page Start: S38
• Page End: S48
• Publication Date: 2021-04-04
• Subjects: coke minimizing -- DoE -- GC‐MS -- lignin degradation -- response surface methodology; Chemical engineering -- Periodicals; Technology -- Periodicals; 660.05
• DOI: 10.1002/cjce.24055
• Languages: English
• ISSNs: 0008-4034

Abstract

Abstract: This study focused on maximizing yields of oligomeric and monomeric products while minimizing coke formation in the depolymerization of lignin from an organosolv medium. A design of experiments (DoE) with temperature, time, and ethanol‐water ratio as factors was established and tested. Optimized reaction conditions were found at 185.4°C with 7.5 wt% sodium hydroxide as catalyst, an ethanol‐water ratio of 48.6% (v/v), and a residence time of 30 minutes. With these optimized parameters, maximum monomer and oligomer yields of 9.4 wt% and 86.2 wt% and minimized coke formation of 0.5 wt% were achieved. The oligomeric and monomeric products were characterized by GPC, GC‐MS, and OH‐group determination (Folin‐Ciocalteu).