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Eucalyptus Kraft Lignin as an Additive Strongly Enhances the Mechanical Resistance of Tree-Leaf Pellets

  • Pelleted biomass has a low, uniform moisture content and can be handled and stored cheaply and safely. Pellets can be made of industrial waste, food waste, agricultural residues, energy crops, and virgin lumber. Despite their many desirable attributes, they cannot compete with fossil fuel sources because the process of densifying the biomass and the price of the raw materials make pellet production costly. Leaves collected from street sweeping are generally discarded in landfills, but they can potentially be valorized as a biofuel if they are pelleted. However, the lignin content in leaves is not high enough to ensure the physical stability of the pellets, so they break easily during storage and transportation. In this study, the use of eucalyptus kraft lignin as an additive in tree-leaf pellet production was studied. Results showed that when 2% lignin is added the abrasion resistance can be increased to an acceptable value. Pellets with added lignin fulfilled all requirements of European standards for certification except for ash content. However, as the raw material has no cost, this method can add value or contribute to financing continued sweeping and is an example of a circular economy scenario.

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Metadaten
Author:Leonardo Clavijo, Slobodan Zlatanovic, Gerd Braun, Michael Bongards, Andrés Dieste, Stéphan Barbe
URN:urn:nbn:de:hbz:832-epub4-15216
DOI:https://doi.org/10.3390/pr8030376
ISSN:2227-9717
Parent Title (English):Processes
Publisher:MDPI
Document Type:Article
Language:English
Date of first Publication:2020/03/24
Date of Publication (online):2020/07/08
GND-Keyword:Blatt; Kreislaufwirtschaft; Pellet
Tag:Additive; Biofuel; Circular economy; Eucalyptus kraft lignin; Pellet; Tree leaf
Volume:8
Issue:3
Page Number:9
Institutes:Anlagen, Energie- und Maschinensysteme (F09) / Fakultät 09 / Institut Anlagen und Verfahrenstechnik
Informatik und Ingenieurwissenschaften (F10) / Fakultät 10 / Institut für Automation & Industrial IT
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften
Open Access:Open Access
DeepGreen:DeepGreen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International