Depolymerization of Alkaline Lignin in the Medium of Supercritical 2-Propanolстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 июня 2022 г.
Аннотация:The optimized conditions of alkaline lignin depolymerization in a medium of supercritical 2-propanol to obtain low molecular weight aromatic compounds, which are potential renewable raw materials for organic synthesis, production of various products and materials, were considered. The designed experiment was applied, based on a central composite rotatable uniform plan design of the second-order for three variables (temperature, process time, liquid module) varied at five levels. The target parameters for optimization were the degree of conversion of lignin to soluble products and their molecular weight. Based on the obtained dependences, the optimal depolymerization conditions (450°C, 8 min, liquid module 20) were determined, ensuring 73% degree of lignin conversion. Using high-resolution mass spectrometry, the resulting depolymerization products have an extremely complex component composition, which includes mainly monomeric and dimeric phenols.