Search for dissertations about: "bioenergi"

Showing result 11 - 15 of 121 swedish dissertations containing the word bioenergi.

2. 11. Deactivation of Catalysts and Reaction Kinetics for Upgrading of Renewable Oils

   Author : Prakhar Arora; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HVO; Kinetic modeling; Catalyst deactivation; NiMo; Advanced biofuels; Catalyst; Hydrodeoxygenation;

   Abstract : The transport sector is one of the main contributors of greenhouse gas emissions in the world. Advanced biofuels from renewable oils can play a decisive role in reducing carbon emissions from the transport sector. Advanced biofuels from waste streams like tall oil, used cooking oil etc. READ MORE

4. 12. Towards More Robust Saccharomyces cerevisiae Strains for Lignocellulosic Bioethanol Production: Lessons from process concepts and physiological investigations

   Author : Magnus Ask; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transcriptome; SHF; glutathione; SSF; furfural; redox metabolism; Arundo donax; Lignocellulosic bioethanol; spruce; HMF;

   Abstract : Dwindling oil reserves and the negative impacts of fossil fuels on the environment call for more sustainable energy sources. First-generation bioethanol produced from sugar cane and corn has met some of these needs, but it competes with the food supply for raw materials. READ MORE

5. 13. LIGNIN HYDROTHERMAL LIQUEFACTION IN SUBCRITICAL WATER TO PRODUCE BIOFUEL AND CHEMICALS

   Author : Tallal Belkheiri; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass valorisation; base depolymerisation; biofuel; lignin; green chemicals.;

   Abstract : Lignin is one of the most abundant amorphous macromolecules found in nature. Along with cellulose and hemicellulose, it forms a main component of biomass, and is mainly responsible for providing strength, rigidity and resistance to degradation. From a chemistry perspective, lignin is an important source of aromatics. READ MORE

6. 14. Operational strategies to control the gas composition in dual fluidized bed biomass gasifiers

   Author : Teresa Berdugo Vilches; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; segregation; renewable energy; feldspar; olivine; catalyst; ilmenite; operating conditions; tar removal; in situ gas upgrading; bauxite; steam reforming; dual fluidized bed; char gasification;

   Abstract : Steam gasification of biomass can increase the share of renewable energy and material resources in the energy sector, transportation and different industries. Prior its application, the raw gas produced in biomass gasifiers needs to be cleaned from impurities. READ MORE

7. 15. Strategies for controlling solid biomass conversion in dual fluidized bed gasifiers

   Author : Teresa Berdugo Vilches; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; char gasification; operating conditions; steam reforming; feldspar.; bauxite; segregation; olivine; in situ gas upgrading; ilmenite; dual fluidized bed; tar removal;

   Abstract : In the chemical industry, Synthesis Gas (syngas) has been traditionally produced by steam reforming of natural gas and naphtha. Steam gasification of biomass offers an alternative route for the production of syngas from renewable sources. READ MORE