Abstract
This research work investigated the use of various metal formates with emphasis on sodium formate for catalyzing depolymerization of organosolv lignin to bio-oils rich in monoaromatic phenolic compounds. The addition of sodium or calcium formate to the reaction mixture greatly influenced the bio-oil composition, whereas magnesium formate showed minor influence compared to non-catalytic reactions. The optimum yield of bio-oil was 13.9% of feed lignin achieved at 310 °C after 60 min of reaction time using sodium formate and contained 92 mg monoaromatics per gram of feed lignin. All the bio-oil samples demonstrated narrow molar mass distribution having an average molar mass of 207–277 g mol−1 containing syringol, guaiacol, catechol and methoxy catechol as major compounds.
Original language | English |
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Article number | 117573 |
Number of pages | 13 |
Journal | Fuel |
Volume | 271 |
DOIs | |
Publication status | Published - 1 Jul 2020 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Bio-oil
- Depolymerization
- Hydrothermolysis
- Lignin
- Metal formates
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