Search for dissertations about: "Karin Walter"

Found 3 swedish dissertations containing the words Karin Walter.

  1. 1. The use of Fenton chemistry for reducing the refining energy during TMP production the effect of free ferrous and free or chelated ferric ions

    University dissertation from Sundsvall : Mid Sweden University

    Author : Karin Walter; Mittuniversitetet.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The potential of using acid hydrogen peroxide under Fenton conditions to lowerthe electrical energy consumed during the production of Black spruce (Piceamariana) thermomechanical pulp (TMP) was investigated in pilot scale. Thechemical system, which consisted of ferrous sulphate, hydrogen peroxide andoptionally an enhancer (such as a chelating agent), was evaluated as an inter-stagetreatment. READ MORE

  2. 2. Influence of acid hydrogen peroxide treatment on refining energy and TMP properties

    University dissertation from Sundsvall : FSCN - Fibre Science and Communication Network

    Author : Karin Walter; Mittuniversitetet.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TMP; Black Spruce; Energy reduction; Hydrogen peroxide; Ferrous sulphate; Refining; Inter-stage treatment; Pulp and paper properties; Fenton´s reagent; Bleaching; Sodium dithionite; Brightness; Metals; Fibre dimensions; Cross-sectional dimensions; Chemical composition; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Cellulose and paper engineering; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Cellulosa- och pappersteknik;

    Abstract : The potential of using acid hydrogen peroxide under Fenton conditions to lower the electrical energy consumed during the production of Black spruce (Picea mariana) thermomechanical pulp (TMP) was investigated. The chemical system, which consisted of ferrous sulphate, hydrogen peroxide and optionally an enhancer (3,4-dimethoxybenzyl alcohol, ethylenediaminetetraacetic acid or oxalic acid/sodium oxalate), was evaluated as an inter-stage treatment where the primary refiner was used as a mixer. READ MORE

  3. 3. The Dynamic Detective : Special Interest and Seriality in Contemporary Detective Series

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Karin Molander Danielsson; Uppsala universitet.; [2002]
    Keywords : HUMANIORA; HUMANITIES; English language; Engelska; HUMANITIES and RELIGION Languages and linguistics Other Germanic languages English language; HUMANIORA och RELIGIONSVETENSKAP Språkvetenskap Övriga germanska språk Engelska språket; English; Engelska;

    Abstract : This study argues that the relatively new conventions of detective fiction, special interest and seriality, are expanding and regenerating the genre. Special interest designates a political, ethnic, regional, professional or hobby-related agenda of a special interest group (consisting, usually, of writer, protagonist and readers) which makes up an integral part of the detective story. READ MORE