Per Engstrand

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Background

Professor in Mechanical Pulping Technology at Mid Sweden University since 1st of February 2007 and the Director of the Industrial Research College in Mechanical Pulping Technology.

The general goals within the mechanical pulping research area are to perform scientific and innovative technical research to help forest industry companies to improve energy efficiency, product quality and production efficiency.

Publications

Articles in journals

Sandberg, C. , Berg, J. & Engstrand, P. (2017). Low consistency refining of mechanical pulp - system design. TAPPI Journal, vol. 16: 7, pp. 419-429.

Nelsson, E. , Paulsson, M. , Sandberg, C. , Svensson-Rundlöf, E. & Engstrand, P. (2017). Low dosage sulfite pretreatment at different refining temperatures in mill scale TMP production. Nordic Pulp & Paper Research Journal, vol. 32: 1, pp. 59-69.    

Sandberg, C. , Berg, J. & Engstrand, P. (2017). Mill evaluation of an intensified mechanical pulping process. Nordic Pulp & Paper Research Journal, vol. 32: 2, pp. 204-210.    

Sandberg, C. , Berg, J. & Engstrand, P. (2017). Process intensification in mechanical pulping. Nordic Pulp & Paper Research Journal, vol. 32: 4, pp. 615-622.    

Afewerki, S. , Alimohammadzadeh, R. , Osong, S. H. , Tai, C. , Engstrand, P. & Cordova, A. (2017). Sustainable Design for the Direct Fabrication and Highly Versatile Functionalization of Nanocelluloses. Global Challenges, vol. 1: 7    

Rahman, H. , Lindström, M. E. , Sandström, P. , Salmen, L. & Engstrand, P. (2017). The effect of increased pulp yield using additives in the softwood kraft cook on the physical properties of low-grammage handsheets. Nordic Pulp & Paper Research Journal, vol. 32: 3, pp. 317-323.    

Osong, S. H. , Dahlström, C. , Forsberg, S. , Andres, B. , Engstrand, P. , Norgren, S. & Engström, A. (2016). Nanofibrillated cellulose/nanographite composite films. Cellulose (London), vol. 23: 4, pp. 2487-2500.  

Osong, S. H. , Norgren, S. , Engstrand, P. , Lundberg, M. , Reza, M. & Tapani, V. (2016). Qualitative evaluation of microfibrillated cellulose usingthe crill method and some aspects of microscopy. Cellulose (London), vol. 23: 6, pp. 3611-3624.    

Göransson, K. , Söderlind, U. , Engstrand, P. & Zhang, W. (2015). An experimental study on catalytic bed materials in a biomass dual fluidised bed gasifier. Renewable energy, vol. 81, pp. 251-261.  

Zhang, W. , He, J. , Engstrand, P. & Björkqvist, O. (2015). Economic evaluation on bio-synthetic natural gas production integrated in a thermomechanical pulp mill. Energies, vol. 8: 11, pp. 12795-12809.    

Göransson, K. , Söderlind, U. , Henschel, T. , Engstrand, P. & Zhang, W. (2015). Internal tar/CHreforming in a biomass dual fluidised bed gasifier.. Biomass Conversion and Biorefinery, vol. 5, pp. 355-366.  

Nelsson, E. , Sandberg, C. , Svensson-Rundlöf, E. , Engstrand, P. , Fernando, D. & Daniel, G. (2015). Low dosage sulfite pretreatment in a modern TMP-line. Nordic Pulp & Paper Research Journal, vol. 30: 4, pp. 591-598.    

Berg, J. , Sandberg, C. , Engberg, B. A. & Engstrand, P. (2015). Low-consistency refining of mechanical pulp in the light of forces on fibres. Nordic Pulp & Paper Research Journal, vol. 30: 2, pp. 225-229.    

Walter, K. , Paulsson, M. & Engstrand, P. (2014). Acid Hydrogen Peroxide Treatment of Norway Spruce TMP : The Effect of an Extended pH Range when Catalyzed by Free Ferrous and Free or EDG/EDTA-Chelated Ferric Ions. Journal of wood chemistry and technology, vol. 34: 2, pp. 135-155.  

Osong, S. H. , Norgren, S. , Engstrand, P. , Lundberg, M. & Hansen, P. (2014). Crill : A novel technique to characterize nano-ligno-cellulose. Nordic Pulp & Paper Research Journal, vol. 29: 2, pp. 190-194.  

Osong, S. H. , Norgren, S. & Engstrand, P. (2014). Paper strength improvement by inclusion of nano-ligno-cellulose to Chemi-thermomechanical pulp. Nordic Pulp & Paper Research Journal, vol. 29: 2, pp. 309-316.  

Enberg, S. , Rundlöf, M. , Paulsson, M. , Axelsson, P. , Eriksen, O. & Engstrand, P. (2014). Some causes of formation of colour during storage of hydrogen-peroxide bleached Norway spruce mechanical pulp. Nordic Pulp & Paper Research Journal, vol. 29: 2, pp. 356-366.  

Karlsson, A. , Paulsson, M. , Engstrand, P. & Hedenström, E. (2014). Strategies to reduce heat-induced darkening for enhanced bleachability of mechanical pulps. Appita journal, vol. 67: 1, pp. 50-57.

Enberg, S. , Rundlöf, M. , Paulsson, M. , Axelsson, P. , Eriksen, O. & Engstrand, P. (2014). The influence of process waters on optical properties during storage of hydrogen-peroxide bleached Norway spruce mechanical pulp. Nordic Pulp & Paper Research Journal, vol. 29: 2, pp. 344-355.    

Osong, S. H. , Norgren, S. & Engstrand, P. (2013). An approach to produce nano-ligno-cellulose from mechanical pulp fine materials. Nordic Pulp & Paper Research Journal, vol. 28: 4, pp. 472-479.      

Fjellström, H. , Engstrand, P. & Htun, M. (2013). ON THE RELATIONSHIP BETWEEN WOOD FIBRE WALL SWELLING, CHARGED GROUPS, AND DELAMINATION DURING REFINING. J-FOR-JOURNAL OF SCIENCE & TECHNOLOGY FOR FOREST PRODUCTS AND PROCESSES, vol. 3: 4, pp. 30-34.  

Fjellström, H. , Engstrand, P. & Htun, M. (2013). On the relationship between wood fibre wall swelling, charged groups, and delamination during refining. Journal of Science & Technology for Forest Products and Processes, vol. 3: 4, pp. 30-34.

He, J. , Engstrand, P. , Björkqvist, O. & Zhang, W. (2013). Techno-economic evaluation of a mechanical pulp mill with gasification. Nordic Pulp & Paper Research Journal, vol. 28: 3, pp. 349-357.  

Andersson, S. , Sandberg, C. & Engstrand, P. (2012). Comparison of mechanical pulps from two stage HC single disc and HC double disc - LC refining. Appita journal, vol. 65: 1, pp. 57-62.

Andersson, S. , Sandberg, C. & Engstrand, P. (2012). Effect of long fibre concentration on low consistency refining of mechanical pulp. Nordic Pulp & Paper Research Journal, vol. 27: 4, pp. 702-706.    

Hellström, L. , Carlberg, T. , Engstrand, P. , Gradin, P. & Gregersen, Ø. (2012). Evaluation Of Collimated Chipping Technology For Reducing Energy Consumption In Mechanical Pulping. Journal of Science & Technology for Forest Products and Processes, vol. 2: 3, pp. 6-9.

Gorski, D. , Johansson, L. & Engstrand, P. (2012). Refiner bleaching in a peroxide-based ATMP process compared with conventional bleaching. Holzforschung, vol. 66: 3, pp. 275-281.  

Fernando, D. , Muhic, D. , Engstrand, P. & Daniel, G. (2012). Surface and internal micro/ultrastructure of TMP fibres produced during high-intensity refining elucidate the development of pulp and paper properties. Holzforschung, vol. 66: 4, pp. 467-475.  

Andersson, S. , Sandberg, C. & Engstrand, P. (2012). The effect of rotor position on pulp properties in a two-zoned low consistency refiner. Nordic Pulp & Paper Research Journal, vol. 27: 3, pp. 525-530.    

Muhic, D. , Huhtanen, J. , Sundström, L. , Sandberg, C. , Ullmar, M. , Engstrand, P. & Vuorio, P. (2011). Energy efficiency in double disc refining. Influence of intensity by segment design. Nordic Pulp & Paper Research Journal, vol. 26: 3, pp. 224-231.    

Fernando, D. , Muhic, D. , Engstrand, P. & Daniel, G. (2011). Fundamental understanding of pulp property development under different thermomechanical pulp refining conditions as observed by a new Simons' staining method and SEM observation of the ultrastructure of fibre surfaces. Holzforschung, vol. 65: 6, pp. 777-786.  

Gorski, D. , Mörseburg, K. , Axelsson, P. & Engstrand, P. (2011). Peroxide-based ATMP refining of spruce : energy efficiency, fibre properties and pulp quality. Nordic Pulp & Paper Research Journal, vol. 26: 1, pp. 47-63.    

Hellström, L. , Gradin, P. , Engstrand, P. & Gregersen, Ø. (2011). Properties of wood chips for thermomechanical pulp (TMP) production as a function of spout angle. Holzforschung, vol. 65: 6, pp. 805-809.  

Björkqvist, O. , Engstrand, P. , Htun, M. & Norgren, M. (2010). FORE – Ett nytt industrikombinat baserat på mekaniska massaprocesser. Svensk papperstidning, Nordisk cellulosa, : 2, pp. 24-25.  

Muhic, D. , Sundström, L. , Sandberg, C. , Ullmar, M. & Engstrand, P. (2010). Influence of temperature on energy efficiency in double disc chip refining. Nordic Pulp & Paper Research Journal, vol. 25: 4, pp. 420-427.  

Gorski, D. , Engstrand, P. , Hill, J. , Axelsson, P. & Johansson, L. (2010). Mg(OH)(2)-based hydrogen peroxide refiner bleaching: influence of extractives content in dilution water on pulp properties and energy efficiency. Appita journal, vol. 63: 3, pp. 218-225.

Sikter, D. , Karlström, A. , Sandberg, C. & Engstrand, P. (2008). Economic perspectives on quality control in TMP refining processes. Nordic Pulp & Paper Research Journal, vol. 23: 3, pp. 305-314.    

Rahman, H. , Engstrand, P. , Sandström, P. & Sjöstrand, B. (). Dewatering properties of low grammage handsheets softwood kraft pulps modified to minimize the need for refining. ,

Nelsson, E. , Sandberg, C. , Svensson-Rundlöf, E. , Muhic, D. , Engberg, B. A. & Engstrand, P. (). Substantially improved energy efficiency in mechanical pulping by new feeding segment design and low dosage sulfonation in mill scale. ,

Articles, reviews/surveys

Osong, S. H. , Norgren, S. & Engstrand, P. (2016). Processing of wood-based microfibrillated cellulose and nanofibrillated cellulose, and applications relating to papermaking: a review. Cellulose (London), vol. 23: 1, pp. 93-123.  

Gorski, D. , Hill, J. , Engstrand, P. & Johansson, L. (2010). Review: Reduction of energy consumption in TMP refining through mechanical pre-treatment of wood chips. Nordic Pulp & Paper Research Journal, vol. 25: 2, pp. 156-161.    

Chapters in books

Engstrand, P. & Johansson, B. (2009). Paper recycling. In Pulping Chemistry and Technology. Walter de Gruyter (Pulp and Paper Chemistry and Technology). pp. 391-427.  

Conference papers

Engstrand, P. (2016). Energy efficient mechanical pulping – summary of the Scandinavian industry initiative research work 2011 - 2015. In 2016 International Mechanical Pulping Conference, Jacksonville, Florida, USA  September 28-30, 2016 : SESSION 11: INDUSTRY INITIATIVE FOR ENERGY REDUCTION. Georgia 30092 USA : . pp. 288--303.

Engstrand, P. , Gradin, P. , Hellström, L. , Carlberg, T. , Sandström, P. , Liden, J. , Söderberg, M. & Mats, E. (2016). Improved refining energy efficiency in thermo-mechanical pulping by means of collimated wood chipping – from solid mechanics to full scale evaluation. In PaperWeek Canada 2016 Conference February 1 to 5, 2016, Montreal : Technical Track Program.

Pettersson, G. , Norgren, S. , Höglund, H. & Engstrand, P. (2016). Low energy CTMP in strong and bulky paperboard plies. In Paper Conference and Trade Show, PaperCon 2016.. pp. 556--564.

Nelsson, E. , Sandberg, C. , Svensson-Rundlöf, E. , Paulsson, M. , Granfeldt, T. , Engberg, B. & Engstrand, P. (2016). Mill scale production of TMP with double disk refining-The effects of a mild sulfonation, atmospheric preheating and refining temperatures. In International Mechanical Pulping Conference 2016, IMPC 2016.. pp. 249--259.

Osong, S. H. , Norgren, S. , Pettersson, G. , Engstrand, P. , Còrdova, A. , Afewerki, S. & Alimohammadzadeh, R. (2016). Processing of nanocellulose and applications relating to CTMP-based paperboard and foams. In International Mechanical Pulping Conference 2016, IMPC 2016.. pp. 87--93.

Karlström, A. & Engstrand, P. (2016). Refining efficiency for future CTIVIP and TMP systems co-optimizing fundamental wood material knowledge with a soft sensor control approach. In International Mechanical Pulping Conference 2016, IMPC 2016.. pp. 304--316.

Sandberg, C. , Engstrand, P. & Berg, J. (2016). System Aspects on Low Consistency Refining of Mechanical Pulp. In TAPPI 2016 International Mechanical Pulping Conference (IMPC).. pp. 485--495.

Henshaw Osong, S. , Dahlström, C. , Forsberg, S. , Andres, B. , Engstrand, P. , Norgren, S. , Olin, H. & Engström, A. (2015). Development of CTMP-based nanofibrillated Cellulose /nanographite composites for paper applications. Paper presented at the 9th International Fundamental Mechanical Pulp Research Seminar, 19-20May, Trondheim, Norway

Logenius, L. , Fjellström, H. & Engstrand, P. (2014). A sustainable analysis of sulphonic acid content in CTMP pulps. In International Mechanical Pulping Conference, IMPC 2014, part of PulPaper 2014 Conference. Espoo :

Walter, K. , Paulsson, M. & Engstrand, P. (2014). Acid hydrogen peroxide treatment of Norway spruce TMP : The effect of chelated ferric ions. In International Mechanical Pulping Conference, IMPC 2014.

He, J. , Engstrand, P. & Zhang, W. (2014). Bio-SNG production in a TMP Mill in comparison with BIGCC. In Energy Procedia.. pp. 2894--2897.    

Karlström, A. , Hill, J. , Ferritsius, O. , Ferritsius, R. & Engstrand, P. (2014). Can we increase the proportion of electrical energy into fibre development in existing HC-refiners?. In International Mechanical Pulping Conference, IMPC 2014.

Osong, S. H. , Norgren, S. , Engstrand, P. , Lundberg, M. & Hansen, P. (2014). Development of nano-ligno-cellulose produced from mechanical pulp. In International Mechanical Pulping Conference, IMPC 2014.

Nelsson, E. , Sandberg, C. , Svensson-Rundlöf, E. , Muhic, D. , Rohdén, L. , A. Engberg, B. & Engstrand, P. (2014). Improved energy efficiency in thermomechanical pulping through co-optimixation of intensity by segment design and wood softening by sulfonation. In International mechanical pulping conference IMPC 2014.

Göransson, K. , Söderlind, U. , Henschel, T. , Engstrand, P. & Zhang, W. (2014). Internal tar/CH4 reforming in a biomass dual fluidised bed gasifier. In Proceeding of 4th International Symposium on Gasification and its Applications.

Berg, J. , Sandberg, C. , Engberg, B. & Engstrand, P. (2014). LC Refining Intensity In The Light Of Forces On Fibres. In International Mechanical Pulping Conference, IMPC 2014. Espoo :

Engberg, B. , Logenius, L. & Engstrand, P. (2014). Mechanical properties of sulphonated wood in relation to wing refiner properties. In International Mechanical Pulping Conference, IMPC 2014. Espoo :

Osong, S. H. , Engstrand, P. & Norgren, S. (2013). Mechanical Properties of high-yield pulp handsheets, as affected by blends of Nano-ligno-cellulose. Paper presented at the 2013 TAPPI International Conference on Nanotechnology for Renewable Materials, Stockholm, Sweden , 24-27 June 2013.

Logenius, L. , Engberg, B. A. , Fjellström, H. & Engstrand, P. (2013). Mechanical Properties of Sulphonated Spruce Wood. Paper presented at the 8th Fundamental mechanical pulping research seminar

Logenius, L. , Engberg, B. A. , Nelsson, E. & Engstrand, P. (2013). Mechanical testing methods for evaluation of the mechanical properties of sulphonated wood. Paper presented at the The 17th International Symposium on Wood, Fiber and Pulping Chemistry; Vancouver, Canada; 12-14 June 2013

Osong, S. H. , Norgren, S. & Engstrand, P. (2013). Nano-ligno-cellulose as strength enhancer in handsheets. Paper presented at the Marcus Wallenberg Prize (MWP 2013) - Young Researchers' Programme, Stockhom , Sweden, 23-24 Sept 2013.

Osong, S. H. , Norgren, S. & Engstrand, P. (2013). Nano-ligno-cellulose from mechanical pulp fines. Paper presented at the European Forest Products Doctoral Symposium 2013

Osong, S. H. , Engstrand, P. & Norgren, S. (2013). New Products based on Mechanical Pulps : Nano-ligno-cellulose (NLC). Paper presented at the 8th International Fundamental Mechanical Pulp Research Seminar, Åre, Sweden, 29-31 Jan, 2013.

Fjellström, H. , Engstrand, P. & Htun, M. (2013). On the relationship between charged groups, chemical environment and delamination during refining.. Paper presented at the 8th International Fundamental Mechanical Pulp Research Seminar (IFMPRS), Åre, Sweden, Jan 29-31, 2013

Osong, S. H. , Engstrand, P. & Norgren, S. (2012). A New Concept to Produce Nano-ligno-cellulose Materials by Means of High Pressure Homogenization. Paper presented at the 3rd International Cellulose Conference (ICC 2012), Oct 10-12, Sapporo, Japan.

Fjellström, H. , Engstrand, P. & Htun, M. (2012). Aspects of fibre wall swelling in high-yield pulp.. In PROCEEDING OF THE 4TH INTERNATIONAL CONFERENCE ON PULPING, PAPERMAKING AND BIOTECHNOLOGY (ICPPB '12), VOLS. I AND II.. pp. 1183--1186.  

Hellström, L. , Carlberg, T. , Engstrand, P. , Gradin, P. & Gregersen, Ø. (2011). Collimated chipping technology in order to reduce the energy consumption in mechanical pulping. In Proceeding for International Mechanical Pulping Conference, Xi'an, P.R. of China.. pp. 457--460.

Engstrand, P. (2011). FILLING THE GAP – IMPROVED ENERGYEFFICIENCY AND QUALITY STABILITYIN MECHANICAL PULP REFINING. Paper presented at the International Mechanical Pulping Conference 2011, Xian China

Logenius, L. , Engstrand, P. , Karlström, A. & Paulsson, M. (2011). Improved hydrogen peroxide bleaching of mechanical pulps using carbon dioxide in combination with sodium and magnesium based alkali sources. In 16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC.. pp. 741--745.

Fjellström, H. , Engstrand, P. , Granfeldt, T. & Logenius, L. (2011). Predicting CTMP bleachability using wood shavings. In 16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC.. pp. 613--616.    

Muhic, D. , Huhtanen, J. , Sundström, L. , Sandberg, C. , Ullmar, M. & Engstrand, P. (2010). Energy efficiency in double disc chip refining. Influence of intensity by segment design. In Proceedings of the 7th InternationalFundamental Mechanical Pulp Research Seminar, Nanjing, China (2010).. pp. 103--111.

Hellström, L. & Engstrand, P. (2010). The effect on the energy consumption in mechanical pulping of different wood chipping conditions. In Proceedings of 7th International Seminar of Fundamental Mechanical Pulp Research (IFMPRS 2010).. pp. 124--126.

Björkqvist, O. , Engstrand, P. & Fridén, H. (2009). Concepts of Steam Recovery from LC-Refining by Increase Temperature. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009.. pp. 190--194.  

Muhic, D. , Sundström, L. , Nilsson, L. , Sandberg, C. , Ullmar, M. , Backlund, U. & Engstrand, P. (2009). Influence of temperature on energy efficiency in double disc chip refining. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009.. pp. 344--347.

Nordin, L. , O'Nils, M. , Engstrand, P. , Bäck, R. , Ferritsius, O. & Sandberg, C. (2009). Measurement and prediction of dewatering characteristics for mechanical pulps using optical fibre analyzers. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009.. pp. 309--316.

Gorski, D. , Engstrand, P. , Hill, J. & Johansson, L. (2009). Review: Reduction of energy consumption in refining through mechanical pretreatment of wood chips. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009.. pp. 17--21.

Nordin, L. , O'Nils, M. , Engstrand, P. & Sundvall, Ö. (2008). Characterization and classification of dewatering measurement techniques for mechanical pulps. In Proceedings of the PRS, Finland, May 2008..

Nordin, L. , O´Nils, M. , Engstrand, P. & Sundvall, Ö. (2008). Towards relevant dewatering measurement techniques : Caracterisation and classification of dewatering measurement techniques for mechanical pulps. In FMPRS May 2008.

Sikter, D. , Karlström, A. , Engstrand, P. & Czmaidalka, J. (2007). Using the refining zone temperature profile for quality control. In International Mechanical Pulping Conference 2007, TAPPI. Atlanta, GA : . pp. 894--902.

Möller, K. , Nikko, A. & Engstrand, P. (2002). The effect of multiple recycling on newsprint quality : a large-scale pilot study, performed 1992 -1996. In PTS-CTP Symposium on Deinking Technology, 22-24 April 2002 Munich Germany.

Manuscripts

Nordin, L. , O'Nils, M. , Engstrand, P. , Bäck, R. , Ferritsius, O. , Ferritsius, R. , Sandberg, C. & Sundvall, Ö. Analysis of the quality of optical fibre and fines measurement for prediction of dewatering characteristics for mechanical pulps.

Patents

Engstrand, P. , Sandberg, C. & Nilsson, C. F. (2007). Method for selective removal of ray cells from cellulose pulp US 20070023329 A1 .

Engstrand, P. , Sandberg, C. & Nilsson, C. F. (2006). A method for selective removal of ray cells from cellulose pulp EP 1625253 A1 .

Engstrand, P. , Sandberg, C. , Jonsson, J. , Starck, G. , Wahlgren, M. & Wancke-Ståhl, C. (2005). Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) EP 1407073 B1 .

Engstrand, P. , Lindgren, J. & Agnemo, R. (2004). A method for increasing the stability of fluorescent whitening agent WO 2004050994 A1 .

Sandberg, C. , Engstrand, P. & Nilsson, C. F. (2004). A method for selective removal of ray cells from cellulose pulp CA 2524177 A1 .

Engstrand, P. , Sandberg, C. & Nilsson, C. F. (2004). A method for selective removal of ray cells from cellulose pulp WO 2004097106 A1 .

Engstrand, P. , Sandberg, C. , Jonsson, J. , Wancke-Ståhl, C. , Starck, G. & Wahlgren, M. (2004). Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) .

Engstrand, P. , Sandberg, C. , Wancke-Ståhl, C. , Jonsson, J. , Starck, G. & Wahlgren, M. (2004). Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) US 20040231811 A1 .

Engstrand, P. , Sandberg, C. , Jonsson, J. , Wancke-Ståhl, C. , Starck, G. & Wahlgren, M. (2003). Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) CA 2451155 A1 .

Engstrand, P. , Sandberg, C. , Jonsson, J. , Starck, G. , Wahlgren, M. & Wancke-Ståhl, C. (2003). Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) WO 2003000982 A1 .

Engstrand, P. & Karlström, A. (1994). System for continuously measuring pressure and temperature in the beating zone of refiners WO 1996014156 A1 .

Engstrand, P. & Karlström, A. (1994). System zur kontinuierlichen messung von druck und temperatur im zerkleinerungsbereich eines refinders .

Engstrand, P. , Pettersson, R. , Htun, M. , Hammar, L. Å. & Svensson, B. (1993). Method of making mechanical and chemi-mechanical papermaking pulp CA 1320067 C .

Engstrand, P. , Pettersson, R. , Htun, M. , Hammar, L. Å. & Svensson, B. (1993). Method of making mechanical and chemi-mechanical papermaking pulp EP 0413736 B1 .

Engstrand, P. , Hammar, L. Å. , Sjögren, B. , Svensson, B. & Htun, M. (1992). A method of producing cellulosic pulp EP 0500674 A1 .

Engstrand, P. , Hammar, L. Å. , Sjögren, B. , Svensson, B. & Htun, M. (1991). A method of producing cellulosic pulp WO 1991006700 A1 .

Engstrand, P. , Pettersson, R. , Hammar, L. Å. , Htun, M. & Svensson, B. (1991). Method of making mechanical and chemi-mechanical papermaking pulp. EP 0413736 A1 .

Engstrand, P. , Hammar, L. Å. , Htun, M. & Pettersson, R. (1991). Method of reducing the energy consumption at the refining of cellulose containing material US 5007985 A .

Engstrand, P. , Hammar, L. Å. , Htun, M. & Pettersson, R. (1991). Method of reducing the energy consumption at the refining of cellulose containing material US 5007985 A .

Engstrand, P. , Htun, M. , Pettersson, R. & Hammar, L. Å. (1991). Method of reducing the energy consumption at the refining of cellulose-containing material CA 1281856 C .

Engstrand, P. , Hammar, L. Å. , Htun, M. , Pettersson, R. & Svensson, B. (1989). Method of making mechanical and chemi-mechanical papermaking pulp WO 1989010998 A1 .

Engstrand, P. , Hammar, L. Å. , Htun, M. & Pettersson, R. (1989). Method of reducing the energy consumption at the refining of cellulose-containing material EP 0302075 A1 .

Engstrand, P. , Htun, M. , Hammar, L. Å. & Pettersson, R. (1987). Method of reducing the energy consumption at the refining of cellulose-containing material WO 1987006280 A1 .

Reports

Engstrand, P. O. , Ferritsius, O. , Björkqvist, O. , Johansson, L. , Johansson, Ö. , Daniel, G. , Ferritsius, R. , Karlström, A. & et al. (2015). Mekmassainitiativet för energieffektivitet, e2mp-i. Sundsvall : Mittuniversitetet (Rapportserie FSCN 2015:58).

Engstrand, P. O. & Engberg, B. A. (2014). Filling the Gap - Final Report. Sundsvall : (Rapportserie FSCN 2014:57).

Björkqvist, O. , Engstrand, P. & Fridén, H. (2008). Energiåtervinning vid LC-raffinering – Förstudie. Stockholm : Värmeforsk (Värmeforsk skogsindustriella programmet S5-622).