Abstract
Lignin is extracted by an improved organosolv method in the presence of different stabilization reagents including formaldehyde, formic acid, and methanol. The structure and thermochemical properties of the extracted lignin were characterized by gel permeation chromatography, Fourier transform infrared spectroscopy, heteronuclear single quantum correlation nuclear magnetic resonance, and thermogravimetric analysis techniques. During the extraction pretreatment, the fragmentation of lignin was suppressed via the addition of formaldehyde. The characteristic structure of natural lignin was retained by inhibiting the β-O-4 bond from cleavage. The fast pyrolysis of the extracted lignin was analyzed by the pyrolysis-gas chromatography/mass spectrometry technique. Compared with the formaldehyde-stabilized lignin, unstabilized lignin appeared to be more thermally resistant to volatilization. Because of the stabilization effect of formaldehyde, the pyrolysis yield of condensable volatiles was tripled; meanwhile, l...
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.
