Quebra da celulose de bagaço da laranja utilizando líquido iônico

Abstract

The acid hydrolysis is a method used to break down cellulose into smaller sugars. To carry out this method, common acids are usually used, such as hydrochloric acid, sulfuric acid, among others. In the present work, ionic liquid (IL) was synthetized and used to replace the common acids. Ionic liquids are green solvents, most of which are low cost and have been used in industries. The IL used in this work was triethylammonium hydrogen sulfate, that has a pH = 4, an ionic liquid synthesized from sulfuric acid and triethylamine. The orange pomace was the raw material used to apply acid hydrolysis with the ionic liquid triethylammonium hydrogen sulfate. Orange is a national fruit, easily accessible and with high production, from which large amounts of waste are generated. The hydrolysis method was applied to the in natura sample and to the dry sample - flour. In the in natura sample, it was more efficient to use for the break down of hydrochloric acid than LI. However, for the flour sample, the best result was obtained when performing hydrolysis with LI, being 4.5 times greater than with acid.