Abstract
The future widespread production of biomass-derived fuels, chemicals, and materials requires cost-effective processing of sustainable feedstock. The use of imidazole as a solvent for biomass creates a novel approach that helps to accomplish this idea in a green fashion. This work proposes imidazole as a novel solvent for wheat straw pretreatment, which allowed the production of cellulose- and hemicellulose-rich fractions and added-value products from depolymerization of lignin. Various temperatures (110, 140, and 170 °C) and processing times (1, 2, and 4 h) of pretreatment were investigated. Both cellulose and hemicellulose recovery were highly dependent on reaction temperature. The best result for the recovery of cellulose-rich material was obtained at 170 °C for 2 h, achieving 62.4% w·w-1, whereas native wheat straw is composed by only 38.8% w·w-1 cellulose. For the same conditions, optimal results were also obtained regarding the enzymatic hydrolysis yield (99.3% w·w-1 glucan to glucose yield) in cellulose-rich material. This result was possible to be obtained due to morphological and structural changes in cellulose-rich materials accompanied by extensive delignification (up to 92%). The presence of added-value phenolic compounds in recovered imidazole was analyzed by capillary electrophoresis and HPLC-MS. Vanillin and other lignin-based products were identified. Finally, the high purity of recovered imidazole was demonstrated by 1H and 13C NMR.
| Original language | English |
|---|---|
| Pages (from-to) | 1643-1652 |
| Number of pages | 10 |
| Journal | ACS SUSTAINABLE CHEMISTRY & ENGINEERING |
| Volume | 4 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 7 Mar 2016 |
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Keywords
- Biorefinery
- Crystallinity
- Delignification
- Enzymatic hydrolysis
- Green solvent
- Imidazole
- Lignocellulose
- Pretreatment
Cite this
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Imidazole : Prospect Solvent for Lignocellulosic Biomass Fractionation and Delignification. / Morais, A R C; Pinto, J V; Nunes, D; Roseiro, Luísa B.; Oliveira, M C; Fortunato, E; Bogel-Łukasik, Rafał.
In: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, Vol. 4, No. 3, 07.03.2016, p. 1643-1652.Research output: Contribution to journal › Article
TY - JOUR
T1 - Imidazole
T2 - Prospect Solvent for Lignocellulosic Biomass Fractionation and Delignification
AU - Morais, A R C
AU - Pinto, J V
AU - Nunes, D
AU - Roseiro, Luísa B.
AU - Oliveira, M C
AU - Fortunato, E
AU - Bogel-Łukasik, Rafał
N1 - Sem PDF. This work was supported by the Fundacao para a Ciencia e Tecnologia (FCT, Portugal) through the Bilateral Cooperation project FCT/CAPES 2014/2015 (FCT/1909/27/2/2014/S), strategic projects UID/CTM/50025/2013, UId/QUI/5006/2013, UId/QUI/00100/2013, and REM2013 and RECI/QEQ-MED/0330/2012, and grants SFRH/BD/94297/2013 (ARCM) and IF/00424/2013 (RBL). The NMR spectrometers are part of The National NMR Facility, supported by Fundacao para a Ciencia e a Tecnologia (RECI/BBB-BQB/0230/2012). The work was also supported by CAPES (Brazil) through the Pesquisador Visitante Especial 155/2012 project. The work presented in this paper was carried out in the frame of the EUBis COST Action TD1203 Food Waste Valorisation for Sustainable Chemicals, Materials and Fuels.
PY - 2016/3/7
Y1 - 2016/3/7
N2 - The future widespread production of biomass-derived fuels, chemicals, and materials requires cost-effective processing of sustainable feedstock. The use of imidazole as a solvent for biomass creates a novel approach that helps to accomplish this idea in a green fashion. This work proposes imidazole as a novel solvent for wheat straw pretreatment, which allowed the production of cellulose- and hemicellulose-rich fractions and added-value products from depolymerization of lignin. Various temperatures (110, 140, and 170 °C) and processing times (1, 2, and 4 h) of pretreatment were investigated. Both cellulose and hemicellulose recovery were highly dependent on reaction temperature. The best result for the recovery of cellulose-rich material was obtained at 170 °C for 2 h, achieving 62.4% w·w-1, whereas native wheat straw is composed by only 38.8% w·w-1 cellulose. For the same conditions, optimal results were also obtained regarding the enzymatic hydrolysis yield (99.3% w·w-1 glucan to glucose yield) in cellulose-rich material. This result was possible to be obtained due to morphological and structural changes in cellulose-rich materials accompanied by extensive delignification (up to 92%). The presence of added-value phenolic compounds in recovered imidazole was analyzed by capillary electrophoresis and HPLC-MS. Vanillin and other lignin-based products were identified. Finally, the high purity of recovered imidazole was demonstrated by 1H and 13C NMR.
AB - The future widespread production of biomass-derived fuels, chemicals, and materials requires cost-effective processing of sustainable feedstock. The use of imidazole as a solvent for biomass creates a novel approach that helps to accomplish this idea in a green fashion. This work proposes imidazole as a novel solvent for wheat straw pretreatment, which allowed the production of cellulose- and hemicellulose-rich fractions and added-value products from depolymerization of lignin. Various temperatures (110, 140, and 170 °C) and processing times (1, 2, and 4 h) of pretreatment were investigated. Both cellulose and hemicellulose recovery were highly dependent on reaction temperature. The best result for the recovery of cellulose-rich material was obtained at 170 °C for 2 h, achieving 62.4% w·w-1, whereas native wheat straw is composed by only 38.8% w·w-1 cellulose. For the same conditions, optimal results were also obtained regarding the enzymatic hydrolysis yield (99.3% w·w-1 glucan to glucose yield) in cellulose-rich material. This result was possible to be obtained due to morphological and structural changes in cellulose-rich materials accompanied by extensive delignification (up to 92%). The presence of added-value phenolic compounds in recovered imidazole was analyzed by capillary electrophoresis and HPLC-MS. Vanillin and other lignin-based products were identified. Finally, the high purity of recovered imidazole was demonstrated by 1H and 13C NMR.
KW - Biorefinery
KW - Crystallinity
KW - Delignification
KW - Enzymatic hydrolysis
KW - Green solvent
KW - Imidazole
KW - Lignocellulose
KW - Pretreatment
UR - http://www.scopus.com/inward/record.url?scp=84960155445&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.5b01600
DO - 10.1021/acssuschemeng.5b01600
M3 - Article
VL - 4
SP - 1643
EP - 1652
JO - ACS SUSTAINABLE CHEMISTRY & ENGINEERING
JF - ACS SUSTAINABLE CHEMISTRY & ENGINEERING
SN - 2168-0485
IS - 3
ER -