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  4. From wood to resin - identifying sustainability levers through hotspotting lignin valorisation pathways
 
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2018
Journal Article
Title

From wood to resin - identifying sustainability levers through hotspotting lignin valorisation pathways

Abstract
The concept of bioeconomy supports the diversification strategies of forest-based industries to create new value chains and contribute to economic growth and sustainability. The use of side streams or by-products of the pulp and paper industry (PPI) is seen as a promising approach. In line with this, the idea of substituting fossil-based materials and products is frequently discussed. One such example is the use of lignin as a bio-based alternative for fossil-based phenols. Lignin-based products not only have to fulfil identical technical requirements as their fossil-based counterparts, they are also expected to be more sustainable. This study conducts an integrated hotspot analysis of two lignin valorisation pathways during R&D. The analysis considers the provision of technical kraft lignin as a by-product of a state-of-the-art kraft pulp mill, followed by valorisation, either via solvent fractionation or via base-catalysed depolymerisation (BCD), and the final application of the valorised lignins in phenol formaldehyde resins. As a two-step approach, first of all, the environmental hotspots (e.g., energy-intensive process steps) along the valorisation pathways are identified. Secondly, a variation analysis is carried out, which involves the identification of sustainability levers (e.g., selection of solvents). Identifying those levers at an
Author(s)
Lettner, Miriam
Solt, Pia
Rößiger, Björn
Pufky-Heinrich, Daniela  
Jääskeläinen, Anna-Stiina
Schwarzbauer, Peter
Hesser, Franziska
Journal
Sustainability  
Open Access
DOI
10.3390/su10082745
Additional full text version
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Language
English
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB  
Keyword(s)
  • hotspot analysis

  • early-stage assessment

  • lignin valorisation

  • prospective LCA

  • bioeconomy

  • pulp and paper industry

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