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Lignin-First Fractionation of Softwood Lignocellulose Using a Mild Dimethyl Carbonate and Ethylene Glycol Organosolv Process
De Santi, A., Galkin, M. V., Lahive, C. W., Deuss, P. J. & Barta, K., 7-Sep-2020, In : Chemsuschem. 13, 17, p. 4468-4477 10 p.Research output: Contribution to journal › Article › Academic › peer-review

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- Lignin-First Fractionation of Softwood Lignocellulose Using a Mild Dimethyl Carbonate and Ethylene Glycol Organosolv Process
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DOI
A mild lignin-first acidolysis process (140 °C, 40 min) was developed using the benign solvent dimethyl carbonate (DMC) and ethylene glycol (EG) as a stabilization agent/solvent to produce a high yield of aromatic monophenols directly from softwood lignocellulose (pine, spruce, cedar, and Douglas fir) with a depolymerization efficiency of 77–98 %. Under the optimized conditions (140 °C, 40 min, 400 wt % EG and 2 wt % H2SO4 to pinewood), up to 9 wt % of the aromatic monophenol was produced, reaching a degree of delignification in pinewood of 77 %. Cellulose was also preserved, as evidenced by a 85 % glucose yield after enzymatic digestion. An in-depth analysis of the depolymerization oil was conducted by using GC-MS, HPLC, 2 D-NMR, and size-exclusion chromatography, which provided structural insights into lignin-derived dimers and oligomers and the composition of the sugars and derived molecules. Mass balance evaluation was performed.
Original language | English |
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Pages (from-to) | 4468-4477 |
Number of pages | 10 |
Journal | Chemsuschem |
Volume | 13 |
Issue number | 17 |
Early online date | 26-Feb-2020 |
Publication status | Published - 7-Sep-2020 |
- acidolysis, biomass valorization, depolymerization, dimethyl carbonate, lignin
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