TY - JOUR
T1 - Microwave-Assisted Lignin Extraction—Utilizing Deep Eutectic Solvents to Their Full Potential
AU - Meindl, A.
AU - Petutschnigg, A.
AU - Schnabel, T.
N1 - Export Date: 14 December 2023
Correspondence Address: Meindl, A.; Forest Products Technology and Timber Constructions Department, Markt 136a, Austria; email: [email protected]
Correspondence Address: Schnabel, T.; Forest Products Technology and Timber Constructions Department, Markt 136a, Austria; email: [email protected]
Funding text 1: This research was supported by the federal state of Salzburg under the grant “Holz.Aktiv” and “BiomassCircle”.
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PY - 2022/10/14
Y1 - 2022/10/14
N2 - The current research intended to investigate the suitability of different choline-chloride-based deep eutectic solvents for their role in microwave lignin extraction. Lignin, a widely spread biopolymer in plants and woody structures, is a valuable replacement for fossil-fuel-based materials. While some promising applications have been trialled already, the extraction of this material from its matrix still causes problems. Here, we highlight an efficient and fast method to extract lignin from untreated larch bark with deep eutectic solvents in a standard domestic microwave. We developed a straightforward, green methodology, which can be used on various reaction scales, with materials available to many researchers. Lignin was extracted within only 30 min of microwave irradiation in yields of up to 96%. Compared to traditional deep eutectic extraction by conventional heating, the reaction time was cut by 87% and the energy costs were reduced by 93.5%. The hydrogen bond donors were exchanged and different types, namely acid-based, hydroxyl-based and amide-based donor systems, were evaluated for their suitability concerning microwave lignin extraction. This study presents a novel approach towards energy-efficient and green lignin valorisation, without the inherent need for costly equipment.
AB - The current research intended to investigate the suitability of different choline-chloride-based deep eutectic solvents for their role in microwave lignin extraction. Lignin, a widely spread biopolymer in plants and woody structures, is a valuable replacement for fossil-fuel-based materials. While some promising applications have been trialled already, the extraction of this material from its matrix still causes problems. Here, we highlight an efficient and fast method to extract lignin from untreated larch bark with deep eutectic solvents in a standard domestic microwave. We developed a straightforward, green methodology, which can be used on various reaction scales, with materials available to many researchers. Lignin was extracted within only 30 min of microwave irradiation in yields of up to 96%. Compared to traditional deep eutectic extraction by conventional heating, the reaction time was cut by 87% and the energy costs were reduced by 93.5%. The hydrogen bond donors were exchanged and different types, namely acid-based, hydroxyl-based and amide-based donor systems, were evaluated for their suitability concerning microwave lignin extraction. This study presents a novel approach towards energy-efficient and green lignin valorisation, without the inherent need for costly equipment.
KW - circular economy
KW - deep eutectic solvents
KW - green extraction process
KW - lignin valorisation
KW - microwave
KW - Amides
KW - Biopolymers
KW - Chlorine compounds
KW - Energy efficiency
KW - Eutectics
KW - Fossil fuels
KW - Hydrogen bonds
KW - Microwave irradiation
KW - Solvent extraction
KW - Solvents
KW - Circular economy
KW - Deep eutectic solvents
KW - Extraction process
KW - Green extraction process
KW - Green extractions
KW - Lignin extractions
KW - Lignin valorization
KW - Valorisation
KW - Lignin
KW - Chlorine Compounds
KW - Fossil Fuels
KW - Hydrogen Bonds
UR - https://www.mendeley.com/catalogue/471b8b74-816d-3f75-ad8d-dc78a6c7d492/
U2 - 10.3390/polym14204319
DO - 10.3390/polym14204319
M3 - Article
C2 - 36297896
SN - 2073-4360
VL - 14
JO - Polym.
JF - Polym.
IS - 20
ER -
SDG 7 Affordable and Clean Energy
SDG 8 Decent Work and Economic Growth
SDG 12 Responsible Consumption and Production