The prospects of declining crude oil reserves, a steady increase in energy demand, and concerns for the environment have intensified the search for renewable sources for energy generation, transportation fuels, and petrochemicals. Major breakthroughs have been made in the field of cellulose and hemi-cellulose conversions towards carbon-based transport fuels (e.g. bioethanol and biodiesel) and bio-based chemicals.
However, valorization of lignin, the third major biopolymer in lignocellulosic biomass, is still in a state of infancy. Lignin, due to its aromatic nature, is expected to serve as an excellent starting material for the synthesis of aromatics and alkylated phenolics, which are important intermediates in the petrochemical industry.
In this thesis, the use of a methodology known as catalytic hydrotreatment was used to convert lignin and particularly Alcell lignin to monomeric aromatics and alkylated phenolics. It involves contacting the lignin at elevated temperatures (400 °C) with hydrogen (100-200 bar), in the presence or absent of a solvent and a suitable, often heterogeneous catalyst.
Attractive supported Ru-catalysts were identified for particularly the solvent-free catalytic hydro treatment version, product yields were determined and quantified using advanced GCxGC techniques and reaction pathways on a molecular level are proposed.
Two professors nominated by the University of Groningen have been awarded Royal Decorations on Tuesday 26 April. Professor K.U. Loos is appointed Knight of the Order of the Netherlands Lion. She received this honour from Mayor K. Schuiling at...
Cisca Wijmenga treedt per 1 september 2023 toe tot de Raad van Toezicht van de Hanzehogeschool.
The Board of the University of Groningen has taken note of the Letter to the House of Representatives regarding internationalization in higher education, sent to the House on Friday 21 April by the Minister of Education, Culture and Science Robbert...
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