Abstract
The aim of this study was to optimize the energetic use and extraction of hemicelluloses by hydrolysis with dilute acid of three different lignocellulosics materials from rapid growth biomass using a factorial experimental design and multiple regression models. For that, calorific power value and chemical composition of solid phases after acid hydrolysis of three different lignocellulosic materials were determined (Chamaecytisus proliferus or tagasaste-, Leucaena leucocephala, and a dihybrid of Paulownia (fortunei and elongata). These solid phases were assessed for obtainment of energy, sugars and other by product. Superior calorific value at constant volume over dry basis and lower calorific value at constant pressure was determinated for energy purposes. The proposed acid hydrolysis process allows increased yield and xylan under more selective extraction conditions. Also higher values of superior calorifc power values that raw materials are reported. The operational ranges are especially suitable for the extraction of xylose, which was virtually quantitative at 170 ºC The selective extraction of hemicelulloses alows to have a solid part with a high content in glucan a lignin and the value of superior calorimetric is suitable for obtain energy.
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