TY - JOUR
T1 - Scaling Up Production of Colloidal Lignin Particles
AU - Leskinen, Timo
AU - Smyth, Matthew
AU - Xiao, Yao
AU - Lintinen, Kalle
AU - Mattinen, Maija Liisa
AU - Kostiainen, Mauri A.
AU - Oinas, Pekka
AU - Österberg, Monika
N1 - Publisher Copyright:
© 2017 De Gruyter Open Ltd. All rights reserved.
PY - 2017/12/20
Y1 - 2017/12/20
N2 - Fundamentals of nanoprecipitation process to form colloidal lignin particles (CLPs) from tetrahydrofuran (THF)-water solvent system were studied, and applied in establishment of a robust reactor design for scaled-up CLP production. Spherical lignin particles with an average diameter of 220 nm could be produced by the new reactor design. Evaporation was applied for removal of THF, concentration of the CLP dispersions, and finally for drying of the CLPs into flake like dry form. The dried CLPs could be re-dispersed in water to restore their colloidal form by applying short physical agitation. Salt triggered sedimentation of the particles was also investigated as a way for reducing the energy consumption related to water evaporation from the CLP dispersions. Aqueous thermal post-treatments were demonstrated to yield structural reinforcement of the CLP structure against solvation in various lignin solvents. In summary, the presented work pushes forward the conceptual design of large-scale CLP production, and addresses some of the foreseen technical challenges.
AB - Fundamentals of nanoprecipitation process to form colloidal lignin particles (CLPs) from tetrahydrofuran (THF)-water solvent system were studied, and applied in establishment of a robust reactor design for scaled-up CLP production. Spherical lignin particles with an average diameter of 220 nm could be produced by the new reactor design. Evaporation was applied for removal of THF, concentration of the CLP dispersions, and finally for drying of the CLPs into flake like dry form. The dried CLPs could be re-dispersed in water to restore their colloidal form by applying short physical agitation. Salt triggered sedimentation of the particles was also investigated as a way for reducing the energy consumption related to water evaporation from the CLP dispersions. Aqueous thermal post-treatments were demonstrated to yield structural reinforcement of the CLP structure against solvation in various lignin solvents. In summary, the presented work pushes forward the conceptual design of large-scale CLP production, and addresses some of the foreseen technical challenges.
KW - Colloidal lignin particles (CLP)
KW - Emulsion
KW - Fractionation
KW - Lignin nanoparticles (LNP)
KW - Nanoprecipitation
KW - Tetrahydrofuran (THF)
KW - Thermal post-treatment
KW - Upscaling
UR - http://www.scopus.com/inward/record.url?scp=85042598547&partnerID=8YFLogxK
U2 - 10.3183/npprj-2017-32-04_p586-596_leskinen
DO - 10.3183/npprj-2017-32-04_p586-596_leskinen
M3 - Article
AN - SCOPUS:85042598547
SN - 0283-2631
VL - 32
SP - 586
EP - 596
JO - Nordic Pulp and Paper Research Journal
JF - Nordic Pulp and Paper Research Journal
IS - 4
ER -