Avancerad sökning

Visar resultat 1 - 5 av 50 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Viscosity and boiling point elevation of black liquor from the lignin extraction process and the modification of extracted lignin

   Författare :Ali Seid Moosavifar; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Boiling point elevation; viscosity; Lignin precipitation; Black liquor; black liquor properties; evaporation characteristic; combustion of lignin; Lignin; calcium addition to lignin; alkalisation of black liquor; lignin modification; lignin fuel;

   Sammanfattning : .... LÄS MER

3. 2. Towards a pure kraft lignin

   Författare :Rufus Ziesig; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LignoBoost; black liquor; lignin; impurities; purification; carbohydrate; inorganics; precipitation;

   Sammanfattning : The most widely used production method for paper pulp in the world is kraft pulping. In chemical pulping the polymer, lignin, which binds the wood fibres together, is partly depolymerized. This allows the wood fibres to be separated from each other. LÄS MER

4. 3. Hydrothermal Liquefaction of Lignin into Bio-Oil

   Författare :Huyen Nguyen Lyckeskog; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydrothermal conversion; aging; bio-oil; stability; subcritical water; lignin;

   Sammanfattning : Lignin, one of the three main components of lignocellulosic biomass, is the second most abundant organic polymer found on Earth. Nowadays, most of the lignin (almost 99%) produced in the Kraft pulping process is used as internal fuel. LÄS MER

5. 4. Precipitation of Kraft Lignin: Yield and Equilibrium

   Författare :Weizhen Zhu; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lignin precipitation; molecular weight of lignin; 1H and 13C NMR spectra of lignin; black liquor; Poisson-Boltzmann cell model; LignoBoost process;

   Sammanfattning : Kraft pulping is the dominant pulping process used in the world today. The material efficiency in modern kraft pulp mills is, however, only 40−55% and the final product consists mainly of cellulose. Recently, a novel process called “LignoBoost” has been introduced to separate lignin from kraft black liquor. LÄS MER

7. 5. Precipitation and separation of lignin from kraft black liquor

   Författare :Fredrik Öhman; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pressing; filtration; washing; lignin; separation; precipitation; black liquor; extraction;

   Sammanfattning : The separation of lignin from black liquor is an attractive option to consider for pulp mills. In modern pulp mills, lignin extraction offers the opportunity of withdrawing an energy surplus in the form of a solid biofuel. LÄS MER