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| Author: | Garza Treviño, Ricardo |
| Title: | Catalyitc upgrading of lignin |
| Publication type: | Master's thesis |
| Publication year: | 2015 |
| Pages: | vi + 59 s. + liitt. 8 Language: eng |
| Department/School: | Kemian tekniikan korkeakoulu |
| Main subject: | Biorefineries (KM3005) |
| Supervisor: | Lehtonen, Juha |
| Instructor: | Karinen, Reetta ; Hakonen, Johanna |
| Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201509184389 |
| Location: | P1 Ark Aalto 3069 | Archive |
| Keywords: | organosolv lignin catalytic upgrading monoaromatics hydrodeoxygenation |
| Abstract (eng): | In the broadest vision to contribute to sustainability, with focus on the use of lignin as a sustainable source for the production of chemicals, experiments were performed to find which chemicals may potentially be produced from isolated (organosolv-extracted) lignin through its decomposition by hydrodeoxygenation, as well as to describe the properties and composition of the product as a whole. Catalyst screening was implemented to evaluate the optimal catalyst to obtain low molecular weight organic compounds. The catalyst screening results of the light bio-oil reaction product fraction showed lowest molecular weights for the experiment involving the Pd/C 3% catalyst with values of 363.4 g/mol of number average and 583.9 g/mol of weight average, as well as fraction of light (monomers and dimers) compounds of 24.1%. The experiment involving the Pd/Al2O3 5% showed the highest molecular weights and lowest light compounds fraction. Regarding the gas product, the experiment involving the Pd/Al2O3 5% catalyst exhibited a considerably high amount of methane, and a considerably low amount of hydrogen concentration compared to the other experiments. In regards to the mass balance of the product streams excluding the gas phase, the Pd/Al2O3 5% catalyst showed the highest amount of light bio-oil, however, also the highest amount of char. On the other hand, the lowest amounts of both light bio-oil and char belonged to the experiment involving the Pd/C 3% catalyst. GC-MS analysis was performed to identify 24 small molecular weight compounds. The most representative compounds for the experiments involving the Pd/C 3%, ZrO2, and Pd/Al2O3 5% catalysts were 4-propylsyiringol, trans-4-propenylsyringol, and dihydrosinapyl alcohol, respectively. |
| ED: | 2015-09-27 |
INSSI record number: 52106
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