Cellulose Dissolution and Biomass Pretreatment Using Quaternary Ammonium Ionic Liquids Prepared from H-, G-, and S-Type Lignin-Derived Benzaldehydes and Dimethyl Carbonate
| Autor: | Aaron M. Socha, Victoria Diez, Andrew DeWeese, Roland S. Kalb, David N. Blauch |
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| Rok vydání: | 2019 |
| Předmět: |
Chemistry
General Chemical Engineering 02 engineering and technology General Chemistry Xylose 021001 nanoscience & nanotechnology Xylan Syringaldehyde Industrial and Manufacturing Engineering Microcrystalline cellulose chemistry.chemical_compound 020401 chemical engineering Ionic liquid Lignin 0204 chemical engineering Dimethyl carbonate Cellulose 0210 nano-technology Nuclear chemistry |
| Zdroj: | Industrial & Engineering Chemistry Research. 58:16009-16017 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | The synthesis of novel benzyl alkylammonium ionic liquids (IL) from starting materials derived from grass, softwood, and hardwood lignin was performed using batch reactor systems followed by facile methyl carbonate ion exchange chemistry. Approximately 90% yields of the ILs were achieved over three synthetic steps, and all novel materials were fully characterized by 1H and 13C nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry. The structure–activity relationships of the lignin-derived ILs were evaluated for their ability to dissolve microcrystalline cellulose and convert switchgrass to fermentable sugars (glucose and xylose). All ILs tested, including a 1:1:1 mixture of ILs prepared from vanillin, syringaldehyde, and p-anisaldehyde yielded 52–71% of the glucose and 50–71% of the xylose from the total amount of glucan and xylan available in the raw feedstock. These data compared well to the yields obtained from switchgrass pretreatment with the IL, 1-ethyl-3-methyl imidazolium a... |
| Databáze: | OpenAIRE |
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