Search for dissertations about: "Levulinic acid"

Showing result 1 - 5 of 6 swedish dissertations containing the words Levulinic acid.

2. 1. Levulinic Acid : Versatile Building Block for Plasticizer Design

   Author : Wenxiang Xuan; Minna Hakkarainen; Karin Odelius; Rafael Auras; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; levulinic acid; plasticizer; polylactide; migration; degradation; antibacterial;

   Abstract : The utilization of renewable resources is a challenging and an importantaspect towards development of sustainable plastic products. Therefore,commercial biomass conversion to produce biobased chemicals isnecessary to replace current fossil-based chemicals. READ MORE

4. 2. Formic and Levulinic Acid from Cellulose via Heterogeneous Catalysis

   Author : Johan Ahlkvist; Jyri-Pekka Mikkola; Riitta Keiski; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Levulinic acid; formic acid; Amberlyst 70;

   Abstract : The chemical industry of today is under increased pressure to develop novel green materials, bio-fuels as well as sustainable chemicals for the chemical industry. Indeed, the endeavour is to move towards more eco-friendly cost efficient production processes and technologies and chemical transformation of renewables has a central role considering the future sustainable supply of chemicals and energy needed for societies. READ MORE

5. 3. Farm to furan derivatives : Fractionation of agricultural residues and transformation of sugars to chemical building blocks

   Author : Sara Jonsdottir Glaser; Bioteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biorefinery; sugar beet pulp; wheat bran; agricultural residue; biomass valorisation; fractionation; bio-based platform chemicals; HMF; levulinic acid; heterogeneous catalysis; whole-cell catalysis;

   Abstract : The transition of industrial production from petrochemistry to a more sustainable economy requires the use of carbon neutral, renewable feedstock, which does not compete with food and feed supplies – by-products of farming and agro-food industry offer this possibility. With a limited range of low-value applications today coupled with the need for maximal utilisation of resources, the by-products of farming can be repurposed as feedstock for biorefineries. READ MORE

6. 4. Valorization of biomass related substrates into value added chemicals : Hydrogen transfer catalysis

   Author : Nitish Kumar Garg; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biomass; levulinic acid; hydrosilylation; borrowing-hydrogen; N-alkylation;

   Abstract : In the current global scenario, it is evident that global warming and climate change are primarily driven by emissions stemming from the utilization of fossil fuels. Yet, if we look around, most of what we see is made from or linked to fossil fuels and it clearly shows our over-dependency on fossil fuels and hence there is a significant need to develop alternate sources of energy and raw materials to tackle these problems. READ MORE

7. 5. Trametes versicolor as biodegrader and biocatalyst when using lignocellulose for ethanol production

   Author : Marie Holmgren; Anita Sellstedt; Mohammad Taherzadeh; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lignocellulose; 5-carbon; 6-carbon; Trametes versicolor; xylose reductase; xylitol dehydrogenase; xylulokinase; phenolics; levulinic acid; HMF; furfural; biodegrader; biocatalyst; pretreatment; xylanase; beta-glucosidase;

   Abstract : Energy consumption has increased rapidly during the last century due to population growth and greater industrialization. Lignocellulosic-based biofuels are being developed as alternatives to fossil fuels. For many years the question of how 5-carbon sugars in biomass are utilized in nature has been a vexed one. READ MORE