Conference program

Plenary speakers

All sessions

Abstracts oral presentations

Poster abstracts

Poster

P1.19 – Integration of industrial dust, sawdust and bark waste in the biorefinery process: the comparative analysis

Qi Nie

Åbo Akademi University

Co-author(s):
kerttu  Suominen, Åbo Akademi University
Andrey Pranovich, Åbo Akademi University
Dmitry Tarasov, Åbo Akademi University
Chunlin Xu, Åbo Akademi University

Lignocellulosic material demonstrates a great potential as an alternative precursor for value-added products manufacture.[1] However, for the further industrial application, biomass should be effectively separated into lignin, hemicellulose, and cellulose. Pressurized hot water extraction (PHWE) is a green and effective method for lignocellulosic biomass fractionation.  The PHWE of materials with smaller particle size improves xylan extraction.[2] The main objective of this work was to investigate the possibility of ultrafine (0.02-0.1 mm) industrial dust integration in the biorefinery process. The established process consisted of PHWE of biomass with further lignin extraction from PHWE-solids and hemicelluloses recovery from hydrolysates using organic solvents.[3],[4] The composition and properties of obtained materials, i.e. PHWE-solids, lignin and hemicelluloses were studied in detail and possible applications suggested. At first, the PHWE of ultrafine industrial hardwood dust waste was characterized comprehensively. Interestingly, the hydrolysate obtained at the most severe PHWE conditions, i.e. 170°C, 45 min (H170/45), contained a significant amount of monosaccharides (15 wt.%), whereas the amounts of oligosaccharides in H160/45, H170/30 and H170/45 were comparable: 42, 41, and 47 wt.% of initial sugar content in dust, respectively. Acetone supplement in hydrolysates, obtained at moderate PHWE severity, allows to recover up to 65-70 wt.% of its carbohydrate content. The molar mass (Mw) of precipitates obtained at lowest and highest PHWE severity was 11.9 and 7.8 kDa, respectively. From the PHWE-solid, produced at the largest severity, 7.5 wt.% of initial lignin was recovered. The similar procedure was applied for lignin and hemicelluloses recovery from softwood ultrafine dust, hardwood and softwood sawdust (0.2-1.4 mm) and bark. Described method could be employed in advanced biorefinery for sustainable product development: high-Mw hemicelluloses could be used for film-forming applications[5] and low-Mw sugars are favorable for biofuel production.[6] Cellulose-rich solids, obtained at the highest PHWE severity, could be employed as a filler in adhesives.[7]

References:[1] S. Wang, G. Dai, H. Yang, and Z. Luo, “Lignocellulosic biomass pyrolysis mechanism: A state-of-the-art review,” Prog Energy Combust Sci, vol. 62, pp. 33–86, Sep. 2017, doi: 10.1016/j.pecs.2017.05.004. [2] P. Kilpeläinen, V. Kitunen, H. Ilvesniemi, J. Hemming, A. Pranovich, and S. Willför, “Pressurized hot water flow-through extraction of birch sawdust – Effects of sawdust density and sawdust size,” Nord Pulp Paper Res J, vol. 29, no. 4, pp. 547–556, Dec. 2014, doi: 10.3183/npprj-2014-29-04-p547-556. [3] T. V. Lourencon et al., “Lignin-first integrated hydrothermal treatment (htt) and synthesis of low-cost biorefinery particles,” ACS Sustain Chem Eng, vol. 8, no. 2, pp. 1230–1239, Jan. 2020, doi: 10.1021/acssuschemeng.9b06511. [4] M. G. Ma, N. Jia, J. F. Zhu, S. M. Li, F. Peng, and R. C. Sun, “Isolation and characterization of hemicelluloses extracted by hydrothermal pretreatment,” Bioresour Technol, vol. 114, pp. 677–683, Jun. 2012, doi: 10.1016/j.biortech.2012.03.048. [5] S. M. Shevchenko, K. Chang, J. Robinson, and J. N. Saddler, “Optimization of monosaccharide recovery by post-hydrolysis of the water-soluble hemicellulose component after steam explosion of softwood chips,” Bioresour Technol, vol. 72, no. 3, pp. 207–211, May 2000, doi: 10.1016/S0960-8524(99)00125-X. [6] S. Willför, K. Sundberg, M. Tenkanen, and B. Holmbom, “Spruce-derived mannans – A potential raw material for hydrocolloids and novel advanced natural materials,” Carbohydr Polym, vol. 72, no. 2, pp. 197–210, May 2008, doi: 10.1016/j.carbpol.2007.08.006. [7] D. Tarasov et al., “AqSO biorefinery: a green and parameter-controlled process for the production of lignin–carbohydrate hybrid materials,” Green Chemistry, vol. 24, no. 17, pp. 6639–6656, 2022, doi: 10.1039/D2GC02171D.  

Session: 

  • 1. Biorefinery

Time: 

  • 15:50-17:00

WWSC is a joint research center between KTH Royal Institute of Technology, Chalmers University of Technology and Linköping University. The base is a donation from the Knut and Alice Wallenberg Foundation. The Swedish industry is supporting WWSC via the platform Treesearch.

Contact

Email: conference2025@wwsc.se

Linkedin