| 초록 |
The marine biomass including micro- and macroalgae is gaining great attention as a promising renewable source for production of valuable chemicals. Alginate, a main carbohydrate compound of macroalgae, is composed of mannuronic acid and guluronic acid via 1,4-glycosidic linkages. Based on the cellulose-like structure, the alginate can be utilized as a carbohydrate feedstock in hydrothermal treatment processes. In this work, the hydrothermal treatment of alginate was performed over various types of catalysts in order to investigate the effects of catalysts on alginate depolymerization and production of organic compounds. Heterogeneous and homogeneous acid and base catalysts were employed in the hydrothermal reaction in order to evaluate the catalytic performance and study the relevance between the catalyst properties and activities. Over acid catalysts, the acid-catalyzed hydrothermal decomposition of alginate enhanced the production of monomers, glycolic acid and furfural. In contrast, over base catalysts, the lactic acid and dicarboxylic acids were predominantly produced by the base-catalyzed reaction. |
