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Frodeson, Stefan
Alternative names
Publications (10 of 15) Show all publications
Ståhl, M., Berghel, J., Frodeson, S. & Renström, R. (2013). Energy reduction in wood-fuel pellet production. Forest bioenergy review, 4(19), 6.
Open this publication in new window or tab >>Energy reduction in wood-fuel pellet production
2013 (English)In: Forest bioenergy review, ISSN 2045-8514, Vol. 4, no 19, p. 6-Article in journal (Other academic) Published
National Category
Energy Engineering
Research subject
Environmental and Energy Systems
Identifiers
urn:nbn:se:kau:diva-34916 (URN)
Note

Nej

Available from: 2015-01-15 Created: 2015-01-15 Last updated: 2016-05-26Bibliographically approved
Frodeson, S., Berghel, J. & Renström, R. (2013). PNEUMATIC DRYER AS A SECOND STEP IN A TWO STEP DRYING TECHNIQUE. In: Sixth Nordic Drying Conference NDC 2013: . Paper presented at Sixth Nordic Drying Conference NDC 5-7 juni Taastrup Danmark. Copenhagen, Denmark.
Open this publication in new window or tab >>PNEUMATIC DRYER AS A SECOND STEP IN A TWO STEP DRYING TECHNIQUE
2013 (English)In: Sixth Nordic Drying Conference NDC 2013, Copenhagen, Denmark, 2013Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Copenhagen, Denmark: , 2013
National Category
Energy Engineering
Research subject
Environmental and Energy Systems
Identifiers
urn:nbn:se:kau:diva-29711 (URN)
Conference
Sixth Nordic Drying Conference NDC 5-7 juni Taastrup Danmark
Available from: 2013-10-18 Created: 2013-10-18 Last updated: 2017-12-06Bibliographically approved
Renström, R., Berghel, J., Frodeson, S., Granström, K., Nilsson, L., Lestelius, M., . . . Stawreberg, L. (2013). The drying process from a product perspective. In: : . Paper presented at Nordic Drying Conference - NDC, Taastrup, Danmark 5-7 juni. Copenhagen, Denmark.
Open this publication in new window or tab >>The drying process from a product perspective
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2013 (English)Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Copenhagen, Denmark: , 2013
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
urn:nbn:se:kau:diva-29707 (URN)
Conference
Nordic Drying Conference - NDC, Taastrup, Danmark 5-7 juni
Available from: 2013-10-21 Created: 2013-10-18 Last updated: 2017-12-06Bibliographically approved
Berghel, J., Frodeson, S., Granström, K., Renström, R., Ståhl, M., Nordgren, D. & Tomani, P. (2013). The effects of kraft lignin additives on wood fuel pellet quality, energy use and shelf life. Fuel processing technology, 112(0), 64-69.
Open this publication in new window or tab >>The effects of kraft lignin additives on wood fuel pellet quality, energy use and shelf life
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2013 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 112, no 0, p. 64-69Article in journal (Refereed) Published
Abstract [en]

In 2011, the total consumption of pellets in Sweden amounted to 1.9 million tons, which represents an energy value of 9 TWh. The pellets are used in large-scale as well as in small-scale applications, and increased demands on pellet quality are likely to force pellet producers to improve on the pellet properties. One way of increasing pellet quality is by using additives. The purpose of this article, therefore, is to examine kraft lignin as an additive. Pelletswere produced in a small industrial pellet press located at KarlstadUniversity, Karlstad, Sweden, and 1–4% of kraft lignin was added to the pellets. The results indicate that the addition of an increased amount of kraft lignin to the pellets increases their mechanical durability and their lengths. The results also indicate that dry kraft lignin yields pellets with higher durability as compared to wet kraft lignin. The energy demand was unaffected by the increased use of kraft lignin. The general results presented in this paper are useful for producers of lignin, pellet producers and end-users of pellets, who are interested in developing their products and/or improving the production processes.

Keyword
Pellets Quality Energy efficiency Additive Lignin Storage
National Category
Energy Systems
Research subject
Environmental and Energy Systems
Identifiers
urn:nbn:se:kau:diva-27007 (URN)10.1016/j.fuproc.2013.02.011 (DOI)000319244200009 ()
Available from: 2013-04-22 Created: 2013-04-22 Last updated: 2017-12-07Bibliographically approved
Frodeson, S., Berghel, J. & Renström, R. (2013). The Potential of Using Two-Step Drying Techniques for Improving Energy Efficiency and Increasing Drying Capacity in Fuel Pellet Industries. Drying Technology, 31(15), 1863-1870.
Open this publication in new window or tab >>The Potential of Using Two-Step Drying Techniques for Improving Energy Efficiency and Increasing Drying Capacity in Fuel Pellet Industries
2013 (English)In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 31, no 15, p. 1863-1870Article in journal (Refereed) Published
Abstract [en]

The use of wood fuel pellets has increased worldwide in recent years, and pellet producers conclude that the lack of drying capacity is a barrier to increased production. In this study, we develop a concept of two different dryers called the two-step drying technique. The aim is to show the potential for increasing the drying capacity and improving energy efficiency when introducing a second dryer into the pellet plant. The study is theoretical and based on an industrial packed moving bed dryer. It shows that the drying capacity increased by 22% when a pneumatic second dryer was used.

Keyword
Drying capacity, Energy efficiency, Packed moving bed, Pneumatic dryer, Wood fuel pellet
National Category
Energy Engineering
Research subject
Environmental and Energy Systems; Energy Technology
Identifiers
urn:nbn:se:kau:diva-29958 (URN)10.1080/07373937.2013.833520 (DOI)000335776300015 ()
Available from: 2013-11-01 Created: 2013-11-01 Last updated: 2017-12-07Bibliographically approved
Ståhl, M., Berghel, J., Frodeson, S., Granström, K. & Renström, R. (2012). Effects on Pellet Properties and Energy Use When Starch Is Added in the Wood-Fuel Pelletizing Process. Energy & Fuels, 26(3), 1937-1945.
Open this publication in new window or tab >>Effects on Pellet Properties and Energy Use When Starch Is Added in the Wood-Fuel Pelletizing Process
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2012 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 26, no 3, p. 1937-1945Article in journal (Refereed) Published
Abstract [en]

The production and use of wood-fuel pellets have increased significantly worldwide in recent years. The increased use of biomaterials has resulted in higher raw material prices, and there are no signs that indicate a decrease in raw material competition. Additives can be used for different purposes. Partly, they are used to facilitate the use of new raw materials to increase the raw material base, and partly, they are used to decrease the energy use in the pelletizing process. They are also used to increase durability or shelf life. Consequently, it is necessary to do research that systematically investigates the consequences of using additives. In this work, it is investigated how various percentages of different kinds of starch influence pellet properties, including shelf life and energy use in the pelletizing process. Four different starch grades were used: native wheat starch, oxidized corn starch, native potato starch, and oxidized potato starch. The pellets were produced in a small industrial pellet press located at Karlstad University, Karlstad, Sweden. The result shows that starch increases the durability of the pellets. Oxidized starches increase the durability more than native starches, and the best results were obtained by adding oxidized corn starch. The durability did not decrease with storage time when the pellets were stored indoors during 7 months. The oxidation process was not consistently altered by the addition of starch. The energy consumption of the pellet press decreases when starch is added. Again, the oxidized corn starch showed the best result; when 2.8% of corn starch was added, the average energy consumption was reduced by 14%

Place, publisher, year, edition, pages
Washington DC, Oxford UK: American Chemical Society (ACS), 2012
National Category
Energy Engineering Energy Systems
Research subject
Environmental and Energy Systems
Identifiers
urn:nbn:se:kau:diva-12282 (URN)10.1021/ef201968r (DOI)000301509300046 ()
Available from: 2012-03-15 Created: 2012-03-15 Last updated: 2017-12-07Bibliographically approved
Granström, K., Williams, H., Berghel, J., Frodeson, S., Renström, R., Sandberg, M. & Ståhl, M. (2012). The importance of a holistic perspective when investigating agricultural products as additives in sustainable pellets development. In: : . Paper presented at World Bioenergy 2012/World Pellets 2012. 29-31 May Jönköping Sweden. .
Open this publication in new window or tab >>The importance of a holistic perspective when investigating agricultural products as additives in sustainable pellets development
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2012 (English)Conference paper, Poster (with or without abstract) (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kau:diva-29753 (URN)
Conference
World Bioenergy 2012/World Pellets 2012. 29-31 May Jönköping Sweden
Available from: 2013-10-18 Created: 2013-10-18 Last updated: 2017-12-06Bibliographically approved
Frodeson, S., Berghel, J. & Renström, R. (2012). The Potential in Using Two Step Drying Techniques for Improving Energy Efficiency and Increasing the Drying Capacity in Fuel Pellet Industries. In: : . Paper presented at IDS 2012 - The 18th Symposium in the biennial series of International Drying Symposia Series, November 11-15, 2012, Xiamen, Fujian, China. .
Open this publication in new window or tab >>The Potential in Using Two Step Drying Techniques for Improving Energy Efficiency and Increasing the Drying Capacity in Fuel Pellet Industries
2012 (English)Conference paper, Oral presentation only (Other academic)
National Category
Engineering and Technology
Research subject
Environmental and Energy Systems
Identifiers
urn:nbn:se:kau:diva-15842 (URN)
Conference
IDS 2012 - The 18th Symposium in the biennial series of International Drying Symposia Series, November 11-15, 2012, Xiamen, Fujian, China
Available from: 2012-11-30 Created: 2012-11-29 Last updated: 2017-12-06Bibliographically approved
Frodeson, S. & Renström, R. (2011). Drying of Grain. In: Alves-Filho, Odilio, Eikevik, Trygve, & Alves, Svetlana (Ed.), Proceedings of the 5th Nordic Drying Conference: . Paper presented at NDC 2011 - Fifth Nordic Drying Conference, Helsinki, Aalto university, June 19-21. Trondheim: SINTEF.
Open this publication in new window or tab >>Drying of Grain
2011 (English)In: Proceedings of the 5th Nordic Drying Conference / [ed] Alves-Filho, Odilio, Eikevik, Trygve, & Alves, Svetlana, Trondheim: SINTEF , 2011Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Trondheim: SINTEF, 2011
National Category
Engineering and Technology
Research subject
Environmental and Energy Systems
Identifiers
urn:nbn:se:kau:diva-12281 (URN)978-82-92739-84-6 (ISBN)
Conference
NDC 2011 - Fifth Nordic Drying Conference, Helsinki, Aalto university, June 19-21
Available from: 2012-03-15 Created: 2012-03-15 Last updated: 2016-05-25Bibliographically approved
Berghel, J., Frodeson, S., Granström, K., Renström, R. & Ståhl, M. (2011). Kartläggning och nulägesbeskrivning av pelletskedjan. .
Open this publication in new window or tab >>Kartläggning och nulägesbeskrivning av pelletskedjan
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2011 (Swedish)Report (Other academic)
Series
Projekt SWX-energi ; 23
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kau:diva-29747 (URN)
Available from: 2013-10-18 Created: 2013-10-18 Last updated: 2017-12-06Bibliographically approved
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