Quantitative analysis of feedstock structural properties can help to produce willow biochar with homogenous pore system

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dc.contributor.author Rasa, Kimmo
dc.contributor.author Vihera-Aarnio, Anneli
dc.contributor.author Rytkonen, Peetu
dc.contributor.author Hyvaluoma, Jari
dc.contributor.author Kaseva, Janne
dc.contributor.author Suhonen, Heikki
dc.contributor.author Jyske, Tuula
dc.date.accessioned 2021-06-10T04:04:02Z
dc.date.available 2021-06-10T04:04:02Z
dc.date.issued 2021-08
dc.identifier.citation Rasa , K , Vihera-Aarnio , A , Rytkonen , P , Hyvaluoma , J , Kaseva , J , Suhonen , H & Jyske , T 2021 , ' Quantitative analysis of feedstock structural properties can help to produce willow biochar with homogenous pore system ' , Industrial Crops and Products , vol. 166 , 113475 . https://doi.org/10.1016/j.indcrop.2021.113475
dc.identifier.other PURE: 164860684
dc.identifier.other PURE UUID: 9aeb77e5-f9c7-4886-84a6-2ccabcb452cf
dc.identifier.other WOS: 000649653500006
dc.identifier.other ORCID: /0000-0002-0337-6308/work/95262773
dc.identifier.uri http://hdl.handle.net/10138/330792
dc.description.abstract Novel bioeconomic approaches call for increasingly faster production of lignocellulosic biomass and its bettertailored use for higher added value. The high-yield capacity and structural properties of willows (Salix spp.) suggest their excellent potential for the production of designed biochar for use in agronomic, electronic and technical applications. All these applications rely on the internal pore structure of biochar. However, we lack an in-depth quantitative understanding of the interlinkages between the feedstock properties and the physical quality of the biochar produced. We studied quantitatively how the clonal and within-plant properties of five different willow clones (hybrids of Salix schwerinii E.L. Wolf) affected the micrometre-scale pore properties of the produced biochars (pyrolyzed at + 462 ?C). The porosity and pore size distribution were analysed before and after slow pyrolysis by X-ray microtomography and image analysis. We also studied the potential of conventional low-cost fibre analysis techniques to be used to predict biochar pore properties directly from fresh feedstock. The total porosity (0.55?0.62) and the pore size distribution of willow wood and derived biochars varied between clones. Approximately two-thirds of the biochar total porosity was associated with pores formed by wood fibres. Pyrolysis levelled off the structural variation detected between and within the clones. Pyrolysis-induced shrinkage reduced the pore sizes and narrowed the pore size distribution. The results suggest that conventional fibre analysis techniques could be utilized to predict biochar homogeneity. Short rotation coppice willows are suitable feedstock to produce homogenous biochar precursor for production of bio-based carbon materials to be used in high value-added technical applications. The structural homogeneity of the feedstock and produced biochar can be enhanced by selecting proper harvesting strategy and clones used in plantations. From the industrial perspective, comprehensive understanding of feedstock properties helps to control quality of the produced biochar. en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof Industrial Crops and Products
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Salix
dc.subject Biochar
dc.subject 3D imaging
dc.subject X-ray tomography
dc.subject Pore structure
dc.subject Wood structure
dc.subject Vessels
dc.subject Fibres
dc.subject PYROLYSIS TEMPERATURE
dc.subject MOISTURE-CONTENT
dc.subject WOOD
dc.subject POROSITY
dc.subject GRAVITY
dc.subject PULPS
dc.subject 116 Chemical sciences
dc.title Quantitative analysis of feedstock structural properties can help to produce willow biochar with homogenous pore system en
dc.type Article
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.indcrop.2021.113475
dc.relation.issn 0926-6690
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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