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  • 1. Gorski, D.
    et al.
    Kure, K-A.
    Mörseburg, Kathrin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    On the relationship between improved energy efficiency in high-consistency refining, fibre and fines properties and critical paper properties2011Conference paper (Refereed)
  • 2. Gorski, D.
    et al.
    Mörseburg, Kathrin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Axelsson, P.
    Engstrand, P.
    Peroxide-based ATMP refining of Spruce: Energy efficiency, fibre properties and pulp quality2011In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 26, p. 47-63Article in journal (Refereed)
  • 3. Gorski, D.
    et al.
    Mörseburg, Kathrin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Johansson, Lars
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Role of equipment configuration and process chemicals in peroxide-based ATMP refining of spruce2011In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 26, p. 233-247Article in journal (Refereed)
  • 4. Gorski, D.
    et al.
    Mörseburg, Kathrin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Olson, J.
    Luukkonen, A.
    Fibre and fines quality development in pilot scale high and low consistency refining of ATMP2012In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 27, p. 872-881Article in journal (Refereed)
  • 5.
    Hill, Jan
    et al.
    QualTech AB, Sweden.
    Johansson, Lars
    RISE - Research Institutes of Sweden, Bioeconomy, PFI.
    Mörseburg, Kathrin
    RISE - Research Institutes of Sweden, Bioeconomy, PFI.
    ATMP pulping of Norway spruce: Pulp property development and energy efficiency2017In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, no 1, p. 70-86Article in journal (Refereed)
    Abstract [en]

    ATMP pilot refining trials on Norway spruce were conducted. The ATMP configuration consists of selective wood disintegration and targeted application of chemicals when defibration already is initiated in order to achieve energy-efficient final fibre separation and development. ATMP was compared to TMP and RTS. The TMP like character was maintained despite of differences in pre-treatment, chemicals and primary stage refining energies. The fractional composition of the pulps was, however, altered. Bauer McNett R14 fraction exhibited the largest differences followed by P200 fraction. Thus different process alternatives produced pulps with different fingerprints. The amount of the R14 fibres is important as these tend to cause surface roughness impairing printability. Regardless of strategy, the ATMP pulp properties at equal tensile index (44 Nm/g) were equal or superior to those achieved by TMP or RTS refining. The main difference was the required specific energy input, ranging from 1.71 (TMP) to 1.05 MWh/BDT (ATMP with bisulphite addition). Primary stage refining was explored from multiple trials with the same process configuration and chemistry. The higher the specific energy applied the better is the energy efficiency. Furthermore established refining theories appear inadequate in describing the differences between process alternatives with respect to energy efficiency and pulp property development.

  • 6.
    Mörseburg, Kathrin
    et al.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Hill, J
    QualTech AB, Sweden.
    Nyseth, T-E
    BIM Kemi AB, Sweden.
    Johansson, Lars
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Understanding energy efficiency of different refining concepts from fibre and fines quality2014Conference paper (Refereed)
    Abstract [en]

    Comparative pilot refining trials with Norway spruce chips were conducted in order to gain a better understanding of the principal mechanisms on fibre level for achieving radical energy reduction in the novel ATMP refining concept. The ATMP pulping configurations proved superior energy efficiency in pulp quality development, compared to TMP, RTS and F-RTS concepts. Development of high tensile strength did not progress at the expense of light scattering, even with process chemicals present. Extensive testing of individual particles in long fibre, middle and fines fractions in combination with analyses of properties of fraction sheets has shown that Impressafiner/Fiberizer pre-treatment opens the wood structure, allowing for early development of desired single fibre properties and generation of fibrillar fines. Peroxide combined with magnesium hydroxide affected the interior of the fibre walls, thereby facilitating improved fibre flexibility, collapsibility and swelling. Bisulphite mainly affected the fibre length distribution, reducing the coarse fraction R14 and promoting the generation of considerable amounts of coarse fines and middle fraction particles.

  • 7.
    Mörseburg, Kathrin
    et al.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Hill, Jan
    QualTech AB, Sweden.
    Johansson, Lars
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    ATMP refining of Norway spruce - Defibration characteristics and fibre wall properties2016In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 31, no 3, p. 386-400Article in journal (Refereed)
    Abstract [en]

    Defibration and fibre development patterns were investigated for the novel ATMP refining process, based on pilot scale trials with Norway spruce chips. ATMP refining with different chemical agents was compared to RTS refining with and without Impressa-finer (RT) and Fiberizer (F) pre-treatment. RT-F pre-treatment significantly improved both initial defibration, axial fibre splitting and fibre flexibility, compared to RTS primary stage refining without pre-treatment. Both types of investigated ATMP process chemistry - hydrogen peroxide combined with magnesium hydroxide under alkaline conditions (P) or acid sodium bisulphite (S) added to the primary refiner dilution water - further improved the fibre separation of RT-F pre-treated wood during primary stage RTS refining. This is largely attributed to enhanced fibre swelling. S-treatment facilitated frequent fibre separation within or close to the S2 wall layer, yielding extremely low shive levels and well-fibrillated, thin-walled fibres early in the process. S-treatment also rendered stiffer fibres, which made them susceptible to breakage, axial splitting and internal delamination. P-application is proposed to affect primarily the interior layers of the fibre walls, facilitating rapid fibre wall swelling towards the lumen, fibre softening and flexibilization.

  • 8.
    Mörseburg, Kathrin
    et al.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Imppola, A.
    Johansson, Lars
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Ertsås, P.A.
    Effects of Inlet Pulp Quality and Specific Energy Consumption in Mill-Scale low consistency refining of Mechanical Pulp2013Conference paper (Refereed)
  • 9. Rusu, M.
    et al.
    Mörseburg, Kathrin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Gregersen, Øjvind
    Yamakawa, A.
    Liukkonen, S.
    Relation between fibre flexibility and cross-sectional properties2011In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 6, p. 641-655Article in journal (Refereed)
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