Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution
We propose the treatment of barley straw with 1-ethyl-3-methylimidazolium acetate [EMIMAcO] ionic liquids (ILs) and subsequent precipitation with antisolvent mixtures, thus allowing the separation of the sugar-rich fractions (cellulose and hemicellulose) from the lignin fraction. For this purpose, d...
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MDPI AG
2019-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/9/1862 |
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| author | Marta Lara-Serrano Silvia Morales-delaRosa Jose M. Campos-Martín Jose L. G. Fierro |
| author_facet | Marta Lara-Serrano Silvia Morales-delaRosa Jose M. Campos-Martín Jose L. G. Fierro |
| author_sort | Marta Lara-Serrano |
| collection | DOAJ |
| description | We propose the treatment of barley straw with 1-ethyl-3-methylimidazolium acetate [EMIMAcO] ionic liquids (ILs) and subsequent precipitation with antisolvent mixtures, thus allowing the separation of the sugar-rich fractions (cellulose and hemicellulose) from the lignin fraction. For this purpose, different concentration ranges of acetone:water antisolvent mixtures were studied. In all cases, a high recovery percentage and a high and effective separation of fractions was achieved for 1:1 acetone:water. The fractionated lignocellulosic compounds were studied by using infrared spectroscopy, scanning electron microscopy and <sup>1</sup>H nuclear magnetic resonance characterization techniques. This method allows the possibility of reusing IL, confirming the versatility of the established method. The fraction rich in cellulose and hemicellulose was subjected to acid hydrolysis (0.2 mol/L H<sub>2</sub>SO<sub>4</sub>) for 5 h at 140 °C, obtaining a yield of total reducing sugars of approximately 80%, much higher than those obtained in non-pretreated samples. |
| first_indexed | 2024-04-12T12:18:02Z |
| format | Article |
| id | doaj.art-a3a2521504794a94bf7e425db280afc4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-12T12:18:02Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a3a2521504794a94bf7e425db280afc42022-12-22T03:33:22ZengMDPI AGApplied Sciences2076-34172019-05-0199186210.3390/app9091862app9091862Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid DissolutionMarta Lara-Serrano0Silvia Morales-delaRosa1Jose M. Campos-Martín2Jose L. G. Fierro3Energy and Sustainable Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2 Cantoblanco, 28049 Madrid, SpainEnergy and Sustainable Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2 Cantoblanco, 28049 Madrid, SpainEnergy and Sustainable Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2 Cantoblanco, 28049 Madrid, SpainEnergy and Sustainable Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2 Cantoblanco, 28049 Madrid, SpainWe propose the treatment of barley straw with 1-ethyl-3-methylimidazolium acetate [EMIMAcO] ionic liquids (ILs) and subsequent precipitation with antisolvent mixtures, thus allowing the separation of the sugar-rich fractions (cellulose and hemicellulose) from the lignin fraction. For this purpose, different concentration ranges of acetone:water antisolvent mixtures were studied. In all cases, a high recovery percentage and a high and effective separation of fractions was achieved for 1:1 acetone:water. The fractionated lignocellulosic compounds were studied by using infrared spectroscopy, scanning electron microscopy and <sup>1</sup>H nuclear magnetic resonance characterization techniques. This method allows the possibility of reusing IL, confirming the versatility of the established method. The fraction rich in cellulose and hemicellulose was subjected to acid hydrolysis (0.2 mol/L H<sub>2</sub>SO<sub>4</sub>) for 5 h at 140 °C, obtaining a yield of total reducing sugars of approximately 80%, much higher than those obtained in non-pretreated samples.https://www.mdpi.com/2076-3417/9/9/1862lignocellulosic biomassionic liquidethyl methyl imidazoliumfractionationpretreatmentbarley straw |
| spellingShingle | Marta Lara-Serrano Silvia Morales-delaRosa Jose M. Campos-Martín Jose L. G. Fierro Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution Applied Sciences lignocellulosic biomass ionic liquid ethyl methyl imidazolium fractionation pretreatment barley straw |
| title | Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution |
| title_full | Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution |
| title_fullStr | Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution |
| title_full_unstemmed | Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution |
| title_short | Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution |
| title_sort | fractionation of lignocellulosic biomass by selective precipitation from ionic liquid dissolution |
| topic | lignocellulosic biomass ionic liquid ethyl methyl imidazolium fractionation pretreatment barley straw |
| url | https://www.mdpi.com/2076-3417/9/9/1862 |
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