TY - JOUR
T1 - Purification and concentration of lignin from the spent liquor of the alkaline oxidation of woody biomass through membrane separation technology
AU - Servaes, K.
AU - Varhimo, Antero
AU - Dubreuil, M.
AU - Bulut, M.
AU - Vandezande, P.
AU - Siika-aho, Matti
AU - Sirviö, Jari
AU - Kruus, Kristiina
AU - Porto-Carrero, W.
AU - Bongers, M.
N1 - Funding Information:
This research was partially supported by a grant from the General Secretariat of Research and Technology, Greek Ministry of Development, through the PENED99 program.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Lignocellulosic plant biomass is a renewable and abundant
source for the production of bio-based fuels, chemicals
and chemical building blocks. Efficient fractionation and
conversion of these feedstocks are an essential step in
the valorization of the cellulose, hemicellulose and
lignin fractions. The use of a new two-stage alkaline
oxidation (AlkOx) process has been investigated for the
pretreatment of softwood in presence of sodium
carbonate.Within this study, the use of commercial
polymeric and ceramic ultrafiltration membranes for the
purification and concentration of lignin from the spent
liquor of the AlkOx process has been evaluated enabling
further valorization thereof. Higher permeation fluxes
were observed, ranging from 30 to 139L/m2 h, depending on
the hydrophilicity, pore size and structure/chemistry of
the membrane. High lignin retentions have been obtained
for all membranes. Diafiltration of the spent liquor
using the ESP04 membrane enables the purification of the
lignin fraction with an efficient removal of the
impurities originating from both the lignocellulosic
material and the pretreatment.The integration of both
processes allows the co-valorization of the lignin
fraction, besides the primary C5/C6 sugar fraction
produced in the two-stage alkaline oxidation of softwood.
Also some preliminary techno-economic calculations have
been realized on the membrane separation process to asses
the economic potential of this technology.
AB - Lignocellulosic plant biomass is a renewable and abundant
source for the production of bio-based fuels, chemicals
and chemical building blocks. Efficient fractionation and
conversion of these feedstocks are an essential step in
the valorization of the cellulose, hemicellulose and
lignin fractions. The use of a new two-stage alkaline
oxidation (AlkOx) process has been investigated for the
pretreatment of softwood in presence of sodium
carbonate.Within this study, the use of commercial
polymeric and ceramic ultrafiltration membranes for the
purification and concentration of lignin from the spent
liquor of the AlkOx process has been evaluated enabling
further valorization thereof. Higher permeation fluxes
were observed, ranging from 30 to 139L/m2 h, depending on
the hydrophilicity, pore size and structure/chemistry of
the membrane. High lignin retentions have been obtained
for all membranes. Diafiltration of the spent liquor
using the ESP04 membrane enables the purification of the
lignin fraction with an efficient removal of the
impurities originating from both the lignocellulosic
material and the pretreatment.The integration of both
processes allows the co-valorization of the lignin
fraction, besides the primary C5/C6 sugar fraction
produced in the two-stage alkaline oxidation of softwood.
Also some preliminary techno-economic calculations have
been realized on the membrane separation process to asses
the economic potential of this technology.
KW - Lignin
KW - Lignocellulose
KW - Membrane technology
KW - Separation
KW - Techno-economic evaluation
KW - Two-stage alkaline oxidation
UR - http://www.scopus.com/inward/record.url?scp=84992416882&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2016.10.005
DO - 10.1016/j.indcrop.2016.10.005
M3 - Article
SN - 0926-6690
VL - 106
SP - 86
EP - 96
JO - Industrial Crops and Products
JF - Industrial Crops and Products
ER -
