Essays about: "Extractives"
Showing result 1 - 5 of 17 essays containing the word Extractives.
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1. Analysis and Valorization of Bark from Silver Birch, Scots Pine, and Norway Spruce : Compositional analysis of bark from common Swedish trees in forestry, to optimize sustainability procedures and monetary value of bark residue
University essay from Umeå universitet/Kemiska institutionenAbstract : Silver birch, Scots pine, and Norway spruce are the three most common types of trees in Sweden and make up to 90% of standing volume in Swedish forests (Skogsstyrelsen 2015, 3). With millions of cubic meters of wood being cut down annually, bark and other residues that cannot be used for sawn timber is left over and burnt for energy. READ MORE
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2. Reactivity increasement of prehydrolysis kraft pulp from Acacia crassicarpa and Eucalyptus hybrids
University essay from KTH/Träkemi och massateknologiAbstract : Syftet med detta examensarbete var att öka reaktiviteten hos förhydrolyserad kraftmassa genom att använda tidigare förhydrolysat och svavelsyra under förhydrolysen. Först bestämdes den kemiska sammansättningen av två olika vedråvaror (Acacia crassicarpa och Eucalyptushybrider) för att observera och korrelera med förhydrolysprocessen. READ MORE
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3. Spruce bark biorefinery
University essay from KTH/Fiber- och polymerteknologiAbstract : Spruce Bark contains several fundamental main substances; lignin, non-cellulose polysaccharides, cellulose and extractives. This undergraduate study focuses on developing a process to extract each of these components from spruce bark using a biorefinery concept, with a main focus on extracting lignin without degradation. READ MORE
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4. The Influence of pH, Temperature and Number of Wash Steps on the Washing Efficiency of CTMP Pulp
University essay from Karlstads universitet/Avdelningen för kemiteknikAbstract : In this report, the washing efficiency of chemi-thermomechanical pulp (CTMP) from Norway spruce (Picea abies) was investigated when adjusting the temperature and pH during washing as well as implementing different number of wash steps. Concurrent effects of having a high pH and temperature were also examined. READ MORE
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5. Method Development for Evaluating Pitch Dispersing Agents Used in the Kraft Pulping Process
University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurserAbstract : Depending on wood species and the extractives of the wood, the paper and pulp processes might suffer from problems caused by the formation of pitch deposits from calcium soaps. BIM Kemi is a specialty chemical producer supplying the pulp and paper industry with dispersing agents, which prevent these problems. READ MORE