Catalytic depolymerization of lignin macromolecule to alkylated phenols over various metal catalysts in supercritical tert-butanol
Kim, JaeY; Park, J; Hwang, H; Kim, JK; Song, InKyu; Choi, JW
| HERO ID | 3537205 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | Catalytic depolymerization of lignin macromolecule to alkylated phenols over various metal catalysts in supercritical tert-butanol |
| Authors | Kim, JaeY; Park, J; Hwang, H; Kim, JK; Song, InKyu; Choi, JW |
| Journal | Journal of Analytical and Applied Pyrolysis |
| Volume | 113 |
| Page Numbers | 99-106 |
| Abstract | Three technical lignins (Asian lignin (AL), Organosolv lignin (OL), and Inbicon lignin (IL)) were selectively degraded to alkylated phenols (AP) over Pt/C, Pd/C, Ru/C, and Ni/C in supercritical t-BuOH. AP and other phenolics present in the lignin depolymerized oil fraction (lignin oil) were subjected to several chemical analyses. GC/MS analysis showed AL yielded a maximum of 1.40 wt% of 4-ethylphenol and 4-ethylguaiacol, while OL produced 1.89, 1.11, and 1.43 wt% of syringol, 4-methylsyringol and 4-propylsyringol, respectively under Pt/C condition. Relatively small amounts of AP were obtained from IL because it contained not only lignin moiety but also carbohydrate, ash, and other components. Meanwhile, the average molecular weights (M-w) of the lignin-oils were significantly lower than those of the lignins, clear evidence of lignin depolymerization. Moreover, elemental analysis indicated hydrodeoxygenation mainly occurred during lignin depolymerization. With increasing catalyst amount (Pt/C), total monomeric phenol yields decreased due to side reaction, but some kind of AP such as 4-ethylphenol and 4-ethylguaiacol showed increase trend with increasing catalyst amount. (C) 2014 Elsevier B.V. All rights reserved. |
| Doi | 10.1016/j.jaap.2014.11.011 |
| Wosid | WOS:000356546700014 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Lignin; Depolymerization; Supercritical tert-butanol; Metal catalyst; Hydrodeoxygenation; Alkylated phenols |