EXTRACTION OF LIGNIN FROM SUGARCANE BAGASSE BY USING ALKALINE PROCESS AND ALCOHOLIC ALKALINE PROCESS
Abstract
- The present work was focused on the extraction of lignin from sugarcane bagasse by two extraction processes: alkaline process and alcoholic alkaline process. A Box-Behnken Design of Response Surface Methodology (RSM) was chosen to investigate the optimum conditions of extraction process. Three independent variables in two processes consisting of concentration of solvent, volume of solvent and extraction time were determined based on the yield of lignin. The optimum conditions in alkaline process were found at NaOH concentration of 15%, NaOH volume of 304 mL and extraction time of 2 hr with predicted final lignin yield of 35.62 (%w/w). In alcoholic alkaline process, the optimum conditions were observed at NaOH concentration of 15%, alcoholic NaOH volume of 303 mL and extraction time of 3 hr with predicted lignin yield of 57.19 (%w/w). Predicted values were observed to be in good agreement with experimental values. Then the functional groups present in prepared lignins were identified by using UV-visible spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR). The prepared samples were confirmed as lignin due to the presence of phenolic hydroxyl groups, carbonyl groups and methoxy groups.
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Year
- 2021
Author
-
Phyo Ei Ei Swe
Subject
- Chemistry
Publisher
- Myanmar Academy of Arts and Science (MAAS)