Search for dissertations about: "Fractionation of. Biomass"

Showing result 1 - 5 of 36 swedish dissertations containing the words Fractionation of. Biomass.

2. 1. Fractionation of woody biomass : lignin and suberin in focus

   Author : Ivan Kumaniaev; Joseph Samec; Claudia Crestini; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; lignocellulose; lignin; suberin; biomass; palladium; catalysis; flow chemistry; organisk kemi; Organic Chemistry;

   Abstract : This thesis is dedicated to the research of fractionation and valorization of different types of woody biomass. In the first part, oak (Quercus suber) and birch (Betula pendula) barks are considered. Bark is the outer layer of wood and is treated as waste in the current wood processing technologies. READ MORE

4. 2. Catalytic valorization of lignocellulose : Direct and sidestream upgrading approaches

   Author : Davide Di Francesco; Joseph Samec; Orlando Rojas; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lignin; biomass; catalytic fractionation; dearomatization; heterogeneous catalysis; organisk kemi; Organic Chemistry;

   Abstract : This work aims to explore different approaches for the valorization of lignocellulosic biomass. In this regard, two different strategies are presented: the catalytic upgrading of lignocellulose derivatives from industrial streams, such as pyrolytic oil and kraft lignin, and the direct catalytic fractionation of woody biomass. READ MORE

5. 3. Fractionation of hardwood using steam explosion and hydrotropic extraction : Process development for improved fractionation

   Author : Johanna Olsson; Avdelningen för kemiteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrotropic fractionation; ; Steam explosion; hardwood; sodium xylene sulphonate; Lignocellulosic Biomass; Hydrotropic extraction; Steam explosion; Hardwood; Sodium xylene sulphonate; Lignocellulosic biomass;

   Abstract : The utilisation of biomass instead of fossil resources is an important alternative for the transition into a sustainable society. Biomass, owing to its primary constituents—cellulose, hemicelluloses and lignin—has the potential to replace many products that are produced from fossil resources today, including plastics, textile fibres and fuels. READ MORE

6. 4. 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

7. 5. Production and transformation of organic compounds from renewable feedstock : Catalytic approaches

   Author : Elena Subbotina; Joseph Samec; Pieter Bruijnincx; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lignin; biomass; lignin-first; catalytic fractionation; flow reactors; dibenzodioxocin; silanes; zeolites; visible light photocatalysis; dearomatization; spirolactones; organisk kemi; Organic Chemistry;

   Abstract : This thesis is focused on the development of strategies for lignocellulosic biomass valorization. The thesis consists of two parts.The first part of the presented work is related to the catalytic fractionation of biomass (lignin-first approach) and the production of monomeric compounds from lignocellulose. READ MORE