Abstract
The complicated structures of bagasse hinder the bioconversion processes for the production of bioenergy and biomaterials. In this study, an integrated process of hot-water extraction followed by high-boiling-solvent cooking (HBS, i.e., 1,4-butanediol) was demonstrated to fractionate bagasse into hemicellulose, lignin, and cellulose. The hot-water extraction resulted in the removal of hemicellulose, which facilitated the HBS cooking for the open fiber structure. As a result, 57–70% of lignin was isolated from the cooking spent liquor. Gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), 31P and 1H nuclear magnetic resonance (NMR), and thermogravimetry (TG) were employed for characterization of the organosolv lignin. Results showed that the organosolv lignin exhibited a chemical structure similar to enzymatic hydrolysis/mild acidolysis lignin (EMAL) but formed new phenolic OH groups (3–6-fold of EMAL). The high molecular weight and thermal stability would contribute to the potential application of lignin into value-added products. The proposed processes provide an efficient approach for fractionating the three main components of bagasse, especially lignin.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
