Catalytic upgrading of lignin

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Karinen, Reetta
dc.contributor.advisor Hakonen, Johanna Garza Treviño, Ricardo 2015-09-18T08:45:17Z 2015-09-18T08:45:17Z 2015-08-25
dc.description.abstract 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. en
dc.format.extent 59 + 8
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Catalytic upgrading of lignin en
dc.type G2 Pro gradu, diplomityö en Kemian tekniikan korkeakoulu fi
dc.subject.keyword organosolv en
dc.subject.keyword lignin en
dc.subject.keyword catalytic en
dc.subject.keyword upgrading en
dc.subject.keyword monoaromatics en
dc.subject.keyword hydrodeoxygenation en
dc.identifier.urn URN:NBN:fi:aalto-201509184389
dc.programme.major Biorefineries fi
dc.programme.mcode KM3005 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Lehtonen, Juha
dc.programme Master’s Degree Programme in Environomical Pathways for Sustainable Energy Systems en
dc.location PK fi

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