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Effects of moisture content during densification of biomass pellets, focusing on polysaccharide substances
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013). (Pro2BE)ORCID iD: 0000-0003-0446-4251
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013). (Pro2BE)ORCID iD: 0000-0001-8817-2031
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013). (Pro2BE)ORCID iD: 0000-0002-9707-8896
2019 (English)In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 122, p. 322-330Article in journal (Refereed) Published
Abstract [en]

In this study, we pelletized four different pure polysaccharides represented cellulose - Avicel, hemicelluloses - locus bean gum mannan and beech xylan and other polysaccharides - apple pectin, and three woods - pine, spruce and beech. All were pelletized at 100° in a single pellet press unit with different level of moisture content from 0 to 15%. The maximal friction force and work required for compression and friction was analyzed together with the pellet density and hardness. The results showed that xylan pellets completely changed in color at 10% moisture content, and this also occurred to some extent with pectin pellets. The color of both Avicel and locus bean gum pellets were not affected at all. During compression, the results showed that water does not affect compression up to 5 kN, while above 5 kN water decreases the energy need for densification of Avicel, locus bean gum and woods. Above 5 kN the energy needs for compressing xylan and pectin increases with increased moisture content. The hardest pellets were produced from Avicel, while locus bean gum produced the weakest pellets. The study concludes that there is a significant difference in how water affects the two hemicelluloses, glucomannan and xylan, during densification.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 122, p. 322-330
Keywords [en]
Wood pellets, densification, cellulose, hemicellulose, xylan, glucomannan
National Category
Paper, Pulp and Fiber Technology Bioenergy Energy Systems
Research subject
Environmental and Energy Systems; Chemical Engineering
Identifiers
URN: urn:nbn:se:kau:diva-71411DOI: 10.1016/j.biombioe.2019.01.048ISI: 000459461800034OAI: oai:DiVA.org:kau-71411DiVA, id: diva2:1293053
Note

APC betald 2019.

Available from: 2019-03-02 Created: 2019-03-02 Last updated: 2019-07-10Bibliographically approved

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Frodeson, StefanHenriksson, GunnarBerghel, Jonas

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