| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1383368 | Carbohydrate Polymers | 2016 | 9 Pages |
•Synthesis of new low cost ionic liquid and application in coir fiber treatment for bioethanol production.•Determination of the best conditions for acid hydrolysis of coir fiber.•Efficiency of the acid hydrolysis of coir fiber after treatment with ionic liquid.
Fourteen ionic liquids (ILs) were obtained and characterized by nuclear magnetic resonance and infra-red spectroscopy. One of these liquids, n-butylammonium acetate, was used in the treatment of coir fiber prior to acid hydrolysis. For this purpose, the fiber was pulped with 8% (w/w) sodium hydroxide for 6 h under 2.5 atm pressure at 137 °C and then treated with IL for 2 h at 90 °C. The samples were hydrolyzed in acetic acid at different concentrations and temperatures. The reducing sugar concentrations were determined in all samples, and the optimal hydrolysis conditions were established (32.2% acetic acid at 122.4 °C). The reaction time was also studied, and the conversion was maximized at 3 h. Under the best hydrolysis conditions, crude fiber, pulping fiber, and IL-treated fiber were hydrolyzed to yield 8.53%, 47.58%, and 89.75% of reducing sugars, respectively.
