Sökning: "Hasan Jameel"
Hittade 3 avhandlingar innehållade orden Hasan Jameel.
1. Valorization of Kraft Lignin by Fractionation and Chemical Modifications for Different Applications
Sammanfattning : AbstractLignin is one of the most abundant biopolymers. Approximately 70 million tons of technical lignin is generated annually, but only little is used for products other than energy. The complexity of lignin hinders full utilization in high-value products and materials. LÄS MER
2. Extraction of Polymeric Hemicelluloses from Spruce Wood
Sammanfattning : Hemicelluloses are one of the three main components of spruce wood and constitute about 20% of the wood material. During mechanical pulping, 5–10% of the hemicelluloses are accumulated in waste waters, whereas during chemical pulping 70–80% of the hemicelluloses are lost in process liquors. LÄS MER
3. 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