Sökning: "kraft black liquor"
Visar resultat 21 - 25 av 59 avhandlingar innehållade orden kraft black liquor.
21. Hardwood delignification
Sammanfattning : 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. LÄS MER
22. The Use of Lignin Derivatives to Improve Selected Paper Properties
Sammanfattning : Ved består huvudsakligen av tre typer av polymerer, cellulosa, hemicellulosa och lignin. Lignin bildas i naturen genom enzymatiskt initierad oxidativ koppling av tre olika typer av fenylpropan-enheter. Dessa bygger genom olika kol-kol- och kol-syre-bindningar upp en amorf tredimensionell polymer. LÄS MER
23. Some aspects on the effects of dissolved wood components in kraft pulping
Sammanfattning : During kraft cooking a significant part of the wood material, especially lignin and hemicelluloses, is degraded and dissolved in the cooking liquor, rendering a broad range of degradation products with different molecular mass and functional groups. The main part of this thesis has been devoted to clarify the role of these dissolved wood components (DWC) during kraft cooking. LÄS MER
24. Pressurized entrained-flow high temperature black liquor gasification : CFD based reactor scale-up method and spray burner characterization
Sammanfattning : Black liquor is an important by-product in the chemical kraft pulping process, which provides the paper mill with pulp. Due to both economical and environmental protection driving forces it is important to recover the pulping chemicals and energy contained in the black liquor. LÄS MER
25. Recovery of kraft black liquor using the titanate process : a study of the leaching reaction of 4:5 sodium titanate
Sammanfattning : .... LÄS MER