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Ferritsius, R., Sandberg, C., Ferritsius, O., Rundlöf, M., Daniel, G., Mörseburg, K. & Fernando, D. (2020). Development of fibre properties in mill scale high- And low consistency refining of thermomechanical pulp (Part 1). Nordic Pulp & Paper Research Journal, 35(4), 589-599
Open this publication in new window or tab >>Development of fibre properties in mill scale high- And low consistency refining of thermomechanical pulp (Part 1)
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2020 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 35, no 4, p. 589-599Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to evaluate changes in fibre properties with high (HC)- and low consistency (LC) refining of TMP and determine how these contribute to tensile index. Two process configurations, one with only HC refining and another with HC refining followed by LC refining were evaluated in three TMP mainline processes in two mills using Norway spruce. An increase in tensile index for a given applied specific energy was similar for all LC refiners in the three lines, despite differences in the fibre property profiles of the feed pulps. Compared with only HC refined pulps at a given tensile index, HC+LC refined pulps had greater fibre wall thickness, similar fibre length, strain at break and freeness, but lower light scattering coefficient, fibre curl and external fibrillation. The degree of internal fibrillation, determined by Simons' stain measurements, was similar for both configurations at a given tensile index. The results indicate that the increase in tensile index in LC refining is largely influenced by a decrease in fibre curl and in HC refining by peeling of the fibre walls. Compared at a given tensile index, the shive content (Somerville mass fraction) was similar for both HC+LC and HC refining.

Place, publisher, year, edition, pages
De Gruyter Open Ltd, 2020
Keywords
fibre properties, high consistency refining, low consistency refining, specific energy, TMP, Light scattering, Refining, Textile fibers, Thermomechanical pulp, Thermomechanical pulping process, Fibre wall thickness, Light scattering coefficient S, Low consistency, Norway spruce, Process configuration, Strain at break, Pulp refining
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-50311 (URN)10.1515/npprj-2020-0027 (DOI)2-s2.0-85094164079 (Scopus ID)
Note

Funding details: Energimyndigheten; Funding text 1: The KK-foundation, The Swedish Energy Agency, StoraEnso, Holmen Paper, SCA and Inovocell are gratefully acknowledged for considerable experimental help and financial support. This work was carried out within the energy efficient pulping programme (e2mp) in Sweden.

Available from: 2020-11-05 Created: 2020-11-05 Last updated: 2021-06-08Bibliographically approved
Hill, J., Johansson, L. & Mörseburg, K. (2017). ATMP pulping of Norway spruce: Pulp property development and energy efficiency. Nordic Pulp & Paper Research Journal, 32(1), 70-86
Open this publication in new window or tab >>ATMP pulping of Norway spruce: Pulp property development and energy efficiency
2017 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, no 1, p. 70-86Article in journal (Refereed) Published
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.

National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-29296 (URN)10.3183/NPPRJ-2017-32-01-p070-086 (DOI)2-s2.0-85016421780 (Scopus ID)
Available from: 2017-04-18 Created: 2017-04-18 Last updated: 2019-01-16Bibliographically approved
Mörseburg, K., Hill, J. & Johansson, L. (2016). ATMP refining of Norway spruce - Defibration characteristics and fibre wall properties. Nordic Pulp & Paper Research Journal, 31(3), 386-400
Open this publication in new window or tab >>ATMP refining of Norway spruce - Defibration characteristics and fibre wall properties
2016 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 31, no 3, p. 386-400Article in journal (Refereed) Published
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.

Keywords
ATMP, Defibration, Energy efficiency, Fibre development, High-consistency refining, Pre-treatment, RTS, TMP
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-18929 (URN)10.3183/npprj-2016-31-03-p386-400 (DOI)2-s2.0-84982104879 (Scopus ID)
Available from: 2016-10-26 Created: 2016-10-26 Last updated: 2020-12-02Bibliographically approved
Ferritsius, O., Mörseburg, K. & Ferritsius, R. (2014). Bat of CTMP and TMP plants with respect to quality development and energy efficiency. In: International Mechanical Pulping Conference, IMPC 2014, part of PulPaper 2014 Conference: . Paper presented at 29th International Mechanical Pulping Conference, IMPC 2014, 3 June 2014 through 5 June 2014. PI
Open this publication in new window or tab >>Bat of CTMP and TMP plants with respect to quality development and energy efficiency
2014 (English)In: International Mechanical Pulping Conference, IMPC 2014, part of PulPaper 2014 Conference, PI , 2014Conference paper, Published paper (Refereed)
Abstract [en]

Sixteen TMP/CTMP lines aimed for publication and board grades have been compared for energy efficiency with respect to pulp quality development. The pulp property profile and the process design differed substantially, even for similar product grades. A given level of a specific pulp property was reached over a wide range in specific energy. The most energy efficient lines operated at the highest production rates and with high relative speed of the refiner discs. With respect to the final pulp quality there was no obvious influence of how the screen room was equipped. It was possible to develop the fibers in a proper way just by refining of the whole pulp stream.

Place, publisher, year, edition, pages
PI, 2014
Keywords
Product design, Pulp refining, Refining, Thermomechanical pulping process, Board grades, Energy efficient, Production rates, Pulp properties, Pulp qualities, Relative speed, Specific energy, Energy efficiency, Efficiency, Energy, Plants
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-47455 (URN)2-s2.0-85067760226 (Scopus ID)
Conference
29th International Mechanical Pulping Conference, IMPC 2014, 3 June 2014 through 5 June 2014
Available from: 2020-08-27 Created: 2020-08-27 Last updated: 2020-12-01Bibliographically approved
Mörseburg, K., Hill, J., Nyseth, T.-E. & Johansson, L. (2014). Understanding energy efficiency of different refining concepts from fibre and fines quality (ed.). In: : . Paper presented at Presented at the International Mechanical Pulping Conference, June 2-5th 2014, Helsinki, Finland.
Open this publication in new window or tab >>Understanding energy efficiency of different refining concepts from fibre and fines quality
2014 (English)Conference paper, Published 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.

National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-9673 (URN)2-s2.0-85067736532 (Scopus ID)
Conference
Presented at the International Mechanical Pulping Conference, June 2-5th 2014, Helsinki, Finland
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2020-12-01Bibliographically approved
Mörseburg, K., Imppola, A., Johansson, L. & Ertsås, P. (2013). Effects of Inlet Pulp Quality and Specific Energy Consumption in Mill-Scale low consistency refining of Mechanical Pulp (ed.). In: : . Paper presented at 8th Fundamental Mechanical Pulping Research Seminar, Åre, Sweden.
Open this publication in new window or tab >>Effects of Inlet Pulp Quality and Specific Energy Consumption in Mill-Scale low consistency refining of Mechanical Pulp
2013 (English)Conference paper, Published paper (Refereed)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-9660 (URN)
Conference
8th Fundamental Mechanical Pulping Research Seminar, Åre, Sweden
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2020-12-01Bibliographically approved
Gorski, D., Mörseburg, K., Olson, J. & Luukkonen, A. (2012). Fibre and fines quality development in pilot scale high and low consistency refining of ATMP (ed.). Nordic Pulp & Paper Research Journal, 27, 872-881
Open this publication in new window or tab >>Fibre and fines quality development in pilot scale high and low consistency refining of ATMP
2012 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 27, p. 872-881Article in journal (Refereed) Published
Abstract [en]

The objective of this study was to characterise and compare the development of fibre and fines properties in high consistency (HC) and low consistency (LC) refining of mechanical pulp. Primary refined pulp was produced using the Advanced Thermo-Mechanical Pulp (ATMP) refining process. Pulps were characterized to evaluate external and internal fibrillation, fibre shape and dimensions, surface area of fines and the proportion of split fibres. Based on the results, a different mode of fibre development was proposed for LC and HC refining. The LC refining resulted in a greater reduction in the shives content and R30 Bauer-McNett fibre fraction. The reduced R30 fraction considerably increased the middle fibre fractions; however it showed no further development in terms of surface fibrillation. While HC refining resulted in a significant reduction in fibre wall thickness associated with fibre collapse and increase in external fibrillation, LC refining mainly generated structural changes, seen in fibre straightening and increased flexibility. The HC and LC refined pulps had different property profiles compared at equal handsheet tensile index. The LC refined pulps contained less long fibres and fines but significantly more middle fraction particles. Extensive internal fibrillation of the straighter LC refined fibres appeared to have compensated for lower fines content and external fibrillation, producing well bonded sheets with good tensile strength.

Keywords
ATMP, Energy efficiency, Fibre characterization, Fibre development, High-consistency refining, Low-consistency refining
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-9602 (URN)10.3183/NPPRJ-2012-27-05-p872-881 (DOI)2-s2.0-84871807673 (Scopus ID)
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2021-01-05Bibliographically approved
Gorski, D., Kure, K.-A. & Mörseburg, K. (2011). On the relationship between improved energy efficiency in high-consistency refining, fibre and fines properties and critical paper properties (ed.). In: : . Paper presented at International Mechanical Pulping Conference, Xian, China.
Open this publication in new window or tab >>On the relationship between improved energy efficiency in high-consistency refining, fibre and fines properties and critical paper properties
2011 (English)Conference paper, Published paper (Refereed)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-9635 (URN)
Conference
International Mechanical Pulping Conference, Xian, China
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2020-12-01Bibliographically approved
Gorski, D., Mörseburg, K., Axelsson, P. & Engstrand, P. (2011). Peroxide-based ATMP refining of Spruce: Energy efficiency, fibre properties and pulp quality (ed.). Nordic Pulp & Paper Research Journal, 26, 47-63
Open this publication in new window or tab >>Peroxide-based ATMP refining of Spruce: Energy efficiency, fibre properties and pulp quality
2011 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 26, p. 47-63Article in journal (Refereed) Published
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-9590 (URN)10.3183/NPPRJ-2011-26-01-p047-063 (DOI)
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2020-12-01Bibliographically approved
Rusu, M., Mörseburg, K., Gregersen, Ø., Yamakawa, A. & Liukkonen, S. (2011). Relation between fibre flexibility and cross-sectional properties (ed.). BioResources, 6, 641-655
Open this publication in new window or tab >>Relation between fibre flexibility and cross-sectional properties
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2011 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 6, p. 641-655Article in journal (Refereed) Published
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-9594 (URN)
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2020-12-01Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5030-7954

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