Catalyst system investigation in biomimetic delignification of oil palm empty fruit bunches
Biomimetic delignification of oil palm empty fruit bunches with the bio-inspired chemical catalyst system was investigated by mimicking the ligninolytic enzyme's redox mediator formation, i.e., Mn3+ and H2O2. The radical hydroxyl formation from the catalyst system was prevented using Mn2+ ions...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Case Studies in Chemical and Environmental Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666016425001306 |
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| Summary: | Biomimetic delignification of oil palm empty fruit bunches with the bio-inspired chemical catalyst system was investigated by mimicking the ligninolytic enzyme's redox mediator formation, i.e., Mn3+ and H2O2. The radical hydroxyl formation from the catalyst system was prevented using Mn2+ ions and suitable ligands. The Mn3+ ion and H2O2 formations were investigated by combining transition metals, suitable ligands, and oxygen from the air. This study aimed to investigate which of the acidic and alkaline environment biomimetic catalyst systems obtained a high delignification degree: Mn2+-Fe2+ solution in malate, lactate, and malate-lactate buffer at pH 4 or 6, and Cu2+-Mn2+ pyrophosphate suspension in triethanolamine and trisodium phosphate solution at pH > 8. The biomimetic delignification experiment was carried out at 100 °C and a solid-to-liquid ratio of 1:20 for 6 hours. The highest delignification degree in acidic and alkaline environment biomimetic catalyst systems was 11.76 % and 67.74 %, respectively. Mn3+, as the primary biomimetic delignification redox mediator was not formed in the acidic catalyst system, but Mn3+ was formed in the alkaline catalyst system. This study facilitates simple operation and faster delignification time than biological delignification. |
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| ISSN: | 2666-0164 |