Search for dissertations about: "properties of lignin"

Showing result 1 - 5 of 110 swedish dissertations containing the words properties of lignin.

  1. 1. Lignin Extraction from Black Liquor - Properties of the Liquors and Sulphur Content in the Lignin

    Author : Ali Seid Moosavifar; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; heat-treatment; lignin precipitation; boiling point elevation; lignin; alkalisation; biofuel; properties; viscosity; Black liquor; combustion of lignin; lignin modification; viscosity correlations.;

    Abstract : Kraft lignin isolated by precipitation can be considered as being a valuable renewable source of energy and material. Removing lignin from black liquor is also advantageous as it decreases the load on the recovery boiler, which is usually the limiting factor in the production of kraft pulp. READ MORE

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

    Author : Ali Seid Moosavifar; []
    Keywords : 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;

    Abstract : .... READ MORE

  3. 3. Effects of Cell Wall Structure on Tensile Properties of Hardwood Effect of down-regulation of lignin on mechanical performance of transgenic hybrid aspen. Effect of chemical degradation on mechanical performance of archaeological oak from the Vasa ship

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ingela Bjurhager; KTH.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tensile strength; transgenic hybrid aspen; lignin down-regulation; the Vasa ship; chemical degradation; longitudinell draghållfasthet; transgen hybridasp; ligninnedreglering; Vasaskeppet; kemisk nedbrytning; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Wood is a complex material and the mechanical properties are influencedby a number of structural parameters. The objective of this study has been toinvestigate the relationship between the structure and the mechanical propertiesof hardwood. Two levels were of special interest, viz. READ MORE

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

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Weizhen Zhu; [2015]
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 5. Deepening the insights of lignin structure : Lignin-carbohydrate complex (LCC) fractionation and characterization and Kraft lignin amination

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Xueyu Du; KTH.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Improvement of kraft pulping delignification efficiency and value-addition of industrial kraft lignin are two attractive topics. The proposal that delignification is deteriorated by the presence of lignin-carbohydrate complex (LCC) is still being debated. READ MORE