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Additives for wood fuel pellet production - A win, win, win situation
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013). (Miljö- och energisystem)ORCID iD: 0000-0003-2528-4399
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013). (Miljö- och energisystem)ORCID iD: 0000-0002-9707-8896
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013). (Miljö- och energisystem)ORCID iD: 0000-0003-0446-4251
2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

The production and use of wood-fuel pellets, preferably made from sawdust or shavings, have increased significantly worldwide in recent years. If wood-fuel pellets should continue to be a successful biofuel at the energy market there are several factors to take into consideration. The pellet production industry already tries to reduce the production cost, since it is a low margin business. Further, it tries to produce pellets from a broader raw material base and at the same time satisfy the customer requirements while producing a sustainable product. The wood fuel pellet industry has the possibility to meet all these criteria; however, it also has the potential for improvements.

This work focuses on energy efficiency, technical aspects and environmental factors, i.e., the electricity consumption, the physical and mechanical properties of the pellets, and the CO

2 equivalent emitted during production, respectively. 20 various additives, with an admixture of up to 2 % (wt.), have been tested during wood fuel pellet production at Karlstad University. This work presents the benefits of using different additives in pellet production and the cost associated with different additives. The results shows that additive from the sea and from farmlands (algae, rape seed cake and grass) decrease the energy use in the pellet press but unfortunately also decrease the durability. Additives from wood (resins, lignin) and molasses increases the durability of the pellet but shows almost no or little change in electricity consumption. However, using starch grades, white sugar or spent sulphite liquor as an additive increases the mechanical properties while it decreases both the electricity consumption and the climate impact, hence a win-win-win situation. To justify the use of additives from a climate impact perspective in regions with an OECD European electricity mix or the Swedish electricity mix, the usage of additives from the rest products where the CO2 equivalent emissions are allocated to the main product are crucial.

In conclusion, it is necessary to do research that systematically investigates the consequences of using additives for wood fuel pellets to continuously be a successful biofuel at the energy market

Place, publisher, year, edition, pages
2016.
National Category
Energy Engineering Energy Systems Bioenergy
Identifiers
URN: urn:nbn:se:kau:diva-63906OAI: oai:DiVA.org:kau-63906DiVA, id: diva2:1143745
Conference
6th International Symposium "Energy challenges & mechanics - towards a big picture", Inverness, Scotland. 14-18 august 2016
Available from: 2017-09-22 Created: 2017-09-22 Last updated: 2018-07-09Bibliographically approved

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Ståhl, MagnusBerghel, JonasFrodeson, Stefan

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