Abstract
Different types of lignin have been depolymerized via oxidative cleavage in sub- and supercritical water. As expected, a wide range of products of different structure and molecular weight have been obtained. Instead of analysing them one by one, we believe that it is equally useful and much more feasible to determine certain global parameters such as type of aromatic substituents, OH functionality or molecular weight distribution, particularly if the objective is to obtain a mixture of compounds with a particular application. To this end, each sample (products of lignin depolymerisation) was fractionated according to its solubility in water and ethyl acetate and the yield of the different fractions was determined. Then each fraction was analysed using CHNS elemental analysis; 31P- and 13C NMR and aqueous Gel Permeation Chromatography (GPC). Important conclusions about the effect of the reaction on the lignin structure can be deduced. These conclusions agree with previous observations found in literature. Based on these conclusions, some further insights have been proposed.
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.
