Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides
Lignin is an important renewable source of phenolic products. In this study, alkali lignin was depolymerized to produce phenolic compounds. The effects of catalyst, solvent, reaction time, and reaction temperature on the yields of liquid products and volatile fractions were investigated in detail. C...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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North Carolina State University
2014-04-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_3347_Zhang_Phenolics_Production_Depolymerization |
| _version_ | 1811310408179384320 |
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| author | Xinghua Zhang Qi Zhang Jinxing Long Ying Xu Tiejun Wang Longlong Ma Yuping Li |
| author_facet | Xinghua Zhang Qi Zhang Jinxing Long Ying Xu Tiejun Wang Longlong Ma Yuping Li |
| author_sort | Xinghua Zhang |
| collection | DOAJ |
| description | Lignin is an important renewable source of phenolic products. In this study, alkali lignin was depolymerized to produce phenolic compounds. The effects of catalyst, solvent, reaction time, and reaction temperature on the yields of liquid products and volatile fractions were investigated in detail. Compared with the solvents water and octane, alcohols can significantly promote depolymerization of lignin due to the excellent solubility of the degradation products and intermediates. Under the conditions of 300 °C for 2 h in the solvent ethanol, the highest yields of liquid products (75.8 wt%) and volatile fraction (38.1 wt%) were obtained over a ZnCl2 catalyst. Gas chromatograph-mass spectroscopy analysis demonstrated that the volatile fraction was composed of guaiacols (15.09 wt%), phenols (15.79 wt%), and syringols (2.28 wt%). Furthermore, the mechanism for lignin depolymerization is discussed. |
| first_indexed | 2024-04-13T09:58:19Z |
| format | Article |
| id | doaj.art-360dabfa98b84725bea612e9dea27324 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-13T09:58:19Z |
| publishDate | 2014-04-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-360dabfa98b84725bea612e9dea273242022-12-22T02:51:17ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-04-01923347336010.15376/biores.9.2.3347-3360Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal ChloridesXinghua Zhang0Qi Zhang1Jinxing Long2Ying Xu3Tiejun Wang4Longlong Ma5Yuping Li6Guangzhou Institute of Energy Conversion, Chinese Academy of SciencesGuangzhou Institute of Energy Conversion, Chinese Academy of SciencesGuangzhou Institute of Energy Conversion, Chinese Academy of SciencesGuangzhou Institute of Energy Conversion, Chinese Academy of SciencesGuangzhou Institute of Energy Conversion, Chinese Academy of SciencesGuangzhou Institute of Energy Conversion, Chinese Academy of SciencesGuangzhou Institute of Energy Conversion, Chinese Academy of SciencesLignin is an important renewable source of phenolic products. In this study, alkali lignin was depolymerized to produce phenolic compounds. The effects of catalyst, solvent, reaction time, and reaction temperature on the yields of liquid products and volatile fractions were investigated in detail. Compared with the solvents water and octane, alcohols can significantly promote depolymerization of lignin due to the excellent solubility of the degradation products and intermediates. Under the conditions of 300 °C for 2 h in the solvent ethanol, the highest yields of liquid products (75.8 wt%) and volatile fraction (38.1 wt%) were obtained over a ZnCl2 catalyst. Gas chromatograph-mass spectroscopy analysis demonstrated that the volatile fraction was composed of guaiacols (15.09 wt%), phenols (15.79 wt%), and syringols (2.28 wt%). Furthermore, the mechanism for lignin depolymerization is discussed.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_3347_Zhang_Phenolics_Production_DepolymerizationAlkali ligninCatalytic depolymerizationMetal chloridesPhenolic compounds |
| spellingShingle | Xinghua Zhang Qi Zhang Jinxing Long Ying Xu Tiejun Wang Longlong Ma Yuping Li Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides BioResources Alkali lignin Catalytic depolymerization Metal chlorides Phenolic compounds |
| title | Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides |
| title_full | Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides |
| title_fullStr | Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides |
| title_full_unstemmed | Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides |
| title_short | Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides |
| title_sort | phenolics production through catalytic depolymerization of alkali lignin with metal chlorides |
| topic | Alkali lignin Catalytic depolymerization Metal chlorides Phenolic compounds |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_3347_Zhang_Phenolics_Production_Depolymerization |
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