Sökning: "Pappers- och massateknik"

Visar resultat 6 - 10 av 70 avhandlingar innehållade orden Pappers- och massateknik.

1. 6. Process Development of Bioethanol Production from Wheat and Barley Residues Steam Pretreatment and SSF

   Författare :Marie Linde; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carbochemistry; Kemiteknik och kemisk teknologi; Chemical technology and engineering; metabolism; Biokemi; Metabolism; Biochemistry; Barley straw; Wheat straw; DDGS; Fermentation; SSF; Enzymatic hydrolysis; H2SO4; Ethanol production; Steam pretreatment; petrochemistry; fuels and explosives technology; Petrokemi; bränslen; sprängämnen; Wood; pulp and paper technology; Pappers- och massateknik; Biotechnology; Bioteknik;

   Sammanfattning : Bioethanol has received increasing attention as an alternative to petrol due to the current dependency on supplies from other countries and due to the increased concentration of the greenhouse gas carbon dioxide in the atmosphere. In this thesis, the development of 2nd generation production processes for bioethanol production from the lignocellulosic part of biomass is discussed. LÄS MER

3. 7. Strategies for Reduced Energy Use and Cost in Pulp and Paper Mills by Energy Integration of the Paper Drying Process

   Författare :Kristian Lindell; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Paper; Pappers- och massateknik; pulp and paper technology; Wood; Energiforskning; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Combined dryer; Energy research; Black liquor gasification; Heat recovery; Secondary energy; Co-generation; Costs; Energy; Drying;

   Sammanfattning : The cost of energy for drying paper is substantial for the pulp and paper industry, and studies of various strategies for energy cost reductions such as increased energy efficiency, increased heat recovery from the exhaust drying air and reduced cost of the process heat are presented in this thesis. The energy use and cost studies were performed using a block-model based simulation tool developed for this specific purpose. LÄS MER

4. 8. Acid-base properties of and metal ion affinity for oxygen-delignified kraft pulps

   Författare :Karin Athley; KTH; []
   Nyckelord :Oxygen-delignified kraft pulps; Carboxylate groups; Potentiometric titration; Acid base properties; Constant capacitance model; Metal ion dsitribution; Surface complexes; Complex formation; Donnan theory;

   Sammanfattning : .... LÄS MER

5. 9. Modelling of rheological properties of coating colours

   Författare :Fabio Barbesta; KTH; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER

7. 10. Local variability in chemical and physical properties of spruce wood fibers

   Författare :Anna Bergander; KTH; []
   Nyckelord :cell walls; chemical composition; elastic constants; elastic strength; Fiber properties; Fibril angles; Mathematical models; Microscopy techniques; Picea Abies; Stiffness; Tensile properties; Wood polymers; Wood;

   Sammanfattning : Wood is well known to be a heterogeneous native materialwith large variations in its composite properties, includingvariations whose origins have not yet been completelyidentified. Traditionally, the macroscopic variations in woodhave received the most attention; for example, the variation indensity from the pith to the bark in trees. LÄS MER