Sökning: "pulping"

Visar resultat 1 - 5 av 161 avhandlingar innehållade ordet pulping.

  1. 1. Ethanol Pulping of Reed Canary Grass

    Författare :Helena Håkansson; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pulping; Nonwood plants; Reed canary grass; Ethanol; Organosolv pulping; Statistical analysis; Chemical Engineering; Kemiteknik;

    Sammanfattning : The aim of this study was to investigate the possibility of processing an agricultural crop grown in Sweden to usable pulp. A further purpose was to study ethanol pulping applied to a non-wood raw material.The first part of this thesis deals with the criteria for selecting a fibre crop for further studies. LÄS MER

  3. 2. Ethanol pulping of reed canary grass

    Författare :Helena Håkansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pulping; ethanol; nonwood plants; reed canary grass; organosolv pulping; statistical analysis;

    Sammanfattning : .... LÄS MER

  4. 3. The initial phase of sodium sulfite pulping of softwood : A comparison of different pulping options

    Författare :Raghu Deshpande; Ulf Germgård; Pedro Fardim; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Activation energy; acid sulfite pulping; bisulfite pulping; cellulose; delignification; dissolving pulp; extractives; glucomannan; hemicelluloses; lignin; lignin condensation; lignin carbohydrate complexes; pine; spruce; thiosulfate; total SO2; xylan; Chemical Engineering; Kemiteknik;

    Sammanfattning : Single stage and two-stage sodium sulfite cooking were carried out on either spruce, pine or pure pine heartwood chips to investigate the influence of several process parameters on the initial phase of such a cook down to about 60 % pulp yield. The cooking experiments were carried out in the laboratory with either a lab-prepared or a mill-prepared cooking acid and the temperature and time were varied. LÄS MER

  5. 4. Wood chips for kraft and sulfite pulping : evaluation of novel forest-industrial drum-chipping technology

    Författare :Jessica Gard Timmerfors; Leif J. Jönsson; David Blomberg; Sören Östlund; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wood chip; drum chipper; impregnation; pulping; sulfite process; kraft process; Scots pine; Norway spruce; heartwood; frozen wood; moisture content;

    Sammanfattning : Wood chipping and the supply of high-quality wood chips are of critical importance for most forest-industrial processes. The quality of wood chips affects product yield, product quality, and processability. LÄS MER

  7. 5. Modified kraft pulping

    Författare :Peter Sandström; KTH; []
    Nyckelord :Delignification; Kraft cooking; Selectivity; Softwood;

    Sammanfattning : .... LÄS MER