Search for dissertations about: "hardwood xylan thesis"

Showing result 1 - 5 of 18 swedish dissertations containing the words hardwood xylan thesis.

2. 1. Hardwood delignification

   Author : Linus Kron; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Precipitated lignin; Black liquor; Hardwood; Kraft delignification; Mass transport;

   Abstract : For the necessary transition into a sustainable and circular society, lignocellulosic resources are set to play a crucial role in replacing fossil-based materials. In the valorisation of lignocellulosic materials, kraft pulping is one of the key processes. READ MORE

4. 2. Hydrogels based on hardwood hemicelluloses

   Author : Inge Gabrielii; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hardwood hemicellulose; pH; Characterization; Chitosan; Swelling; Hydrogel; Ionic strength; Xylan;

   Abstract : .... READ MORE

5. 3. Xylan Reactions in Kraft Cooking : Process and Product Considerations

   Author : Sverker Danielsson; Mikael Lindström; Richard Gustafson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Xylan; Kraft cooking; Paper strength; Sheet density; Methylglucuronic acid; Hexenuronic acid; Cellulose and paper engineering; Cellulosa- och pappersteknik;

   Abstract : Xylan is the main hemicellulose in birch, eucalyptus, and most other hardwood species. During kraft pulping a series of chemical reactions and physical processes involving xylan takes place. READ MORE

6. 4. Carbohydrate degradation and dissolution during Kraft cooking : Modelling of kinetic results

   Author : Dan Johansson; Ulf Germgård; Pedro Fardim; Karlstads universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kraft cooking; softwood; hardwood; cellulose; xylan; glucomannan; degradation; dissolution; Chemical engineering; Kemiteknik; Chemical Engineering; Kemiteknik;

   Abstract : Chemical pulp fibres from wood are commonly used in products associated with packaging as well as with printing and writing. The prevalent way of liberating fibres is by subjecting wood chips to Kraft cooking. This process has a history of almost 130 years and should be both well described and well established. READ MORE

7. 5. Ultrastructural Aspects of Pulp Fibers as Studied by Dynamic FT-IR Spectroscopy

   Author : Margaretha Åkerholm; KTH; []
   Keywords : cellulose; cooperation; crystallinity; dynamic test; glucomannan; hardwood; holocellulose; humidity; infrared spectroscopy; kraft pulp; lignin; mechanical pulp; orientation; polarised light; softwood; strain; sulphite pulp; viscoelasticity; xylan;

   Abstract : Dynamic (or 2D) FT-IR spectroscopy in combination withpolarized IR irradiation has been used in this work to studywood polymer orientation and interactions on theultrastructural level in wood fibers in the native state aswell as the effects of different pulping processes. The woodpolymer interactions were studied under both dry and humidconditions. READ MORE