Abstract

Samples ofEucalyptus globulus wood were delignified in HC1-catalyzed acetic acid medium under selected conditions and extracted with alkaline solutions to improve their susceptibility to enzymatic hydrolysis. The effects of three independent variables defining the operational conditions of the alkaline extraction stage on five dependent variables measuring both the chemical composition and the susceptibility of the solid residues to enzymatic hydrolysis were assessed using empirical models deduced from experimental data. The enzymatic conversion depended mainly on the NaOH concentration used in the alkaline extraction. Hydrolysis yields up to 76% were predicted for operational conditions within the range studied for the independent variables.

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