Strien, Julian (2021) Catalytic hydrotreatment of Kraft lignin: oil yield improvements by pretreatment of lignin using ball milling. Master's Thesis / Essay, Chemical Engineering.
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Abstract
Lignin is the most widely available renewable source of aromatics, and it has gained increased attention from scientists around the world to utilize these aromatics for renewable chemicals. In this study, the effect of mechanical pretreatment of Kraft lignin with solvent-free catalytic hydrotreatment is examined. A phosphide NiMo catalyst was used in a batch autoclave reactor at a temperature of 400 °C for 2 hours with an initial pressure of 100 bar H2 to hydrotreat the lignin. The catalyst was characterized by BET, XRD, and NH3-TPD, the lignin and the ball milling process were characterized by HSQC, NMR and XRF, and the reaction products were characterized with Karl-Fisher titration, TGA, EA, ICP, GPC, GCxGC. Ball milling lignin prior to solvent-free catalytic hydrotreatment resulted in a 35% reduction in solids produced and an increase of 13% on oil yield. Monomeric yield remained the same relative to the oil yield.
| Item Type: | Thesis (Master's Thesis / Essay) |
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| Supervisor name: | Heeres, H.J. and Deuss, P.J. and Yang, H. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 13 Sep 2021 09:09 |
| Last Modified: | 26 Oct 2021 10:18 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/25795 |
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