Search for dissertations about: "Non-process elements"

Showing result 1 - 5 of 10 swedish dissertations containing the words Non-process elements.

  2. 1. From recovery boiler to integration of a textile fiber plant : Combination of mass balance analysis and chemical engineering

    Author : Hans Magnusson; Ulf Germgård; Gunnar Henriksson; Hans Theliander; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; kraft pulping; recovery boiler; smelt properties; non-process elements; oxygen delignification; viscose manufacturing; integrated production; regenerated cellulose; sulfatmassa; fysikaliska egenskaper; smälta; sodapanna; processfrämmande ämnen; bioraffinaderi; integrerad produktion; regenererad cellulosa; Chemical Engineering; Kemiteknik;

    Abstract : Modern chemical technology is an efficient tool for solving problems, particularly within the complex environment of the pulp and paper industry, and the combination of experimental studies, mill data and mass balance calculations are of fundamental importance to the development of the industry. In this study various examples are presented, whereby chemical technology is of fundamental importance. READ MORE

  4. 2. Thermodynamic Modelling of Electrolyte Solutions with Application to the Pulp and Paper Industry

    Author : Anders Jaretun; Avdelningen för kemiteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Potassium; Chloride; Chemical recovery; Leaching; Crystallization; Kraft pulping; Non-process elements; Solubility; Local composition; Excess properties; Osmotic coefficient; Electrolytes; Activity coefficient; Wood; pulp and paper technology; Pappers- och massateknik;

    Abstract : A thermodynamic model for electrolyte solutions has been derived for binary and multicomponent solutions up to very high molalities. The model was extensively tested on 163 binary aqueous electrolyte systems up to very high molalities, and the results show that the model represents mean ionic activity coefficients and osmotic coefficients very accurately. READ MORE

  5. 3. Some aspects of adsorption in displacement washing of pulp

    Author : Karin Mattsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : AbstractThere are many aspects on how to improve the paper pulping process. In the washing sequence improvements to decrease the discharge to the environment can be achieved by closure of the liquid system and recycling liquid from other parts pulp process. READ MORE

  6. 4. Process Integration in Model Kraft Pulp Mills. Technical, Economic and Environmental Implications

    Author : Ulrika Wising; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; pinch technology; system consequences; wastewater; energy; pulp and paper; excess heat; process integration; evaporation;

    Abstract : The technical and economic conditions for reducing the energy consumption cost-efficiently and thereby releasing a surplus of biomass fuel in the pulp and paper industry are changing. For example, new environmental restrictions increase the need for closed water loops and other system modifications, which can lead to increased opportunities for energy savings. READ MORE

  7. 5. Removal of Metal Ions from Wood Chips during Acidic Leaching

    Author : Anna Saltberg; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Scandinavian softwood; spruce; calcium; diffusion coefficient; potassium; birch; Acidic leaching; eucalyptus; metal ions; oxalate;

    Abstract : Wood chips are the main source of intake of non-process elements at kraft pulp mills. It would be advantageous to decrease the content of these elements in the chips prior to pulping. READ MORE