The energetic crisis, defined by the increase of world population, the increase of per capita energy demand, and the gradual depletion of fossil fuels, requires the development of fuels from renewable raw materials. The interests of the group are focused in developing processes for manufacturing second-generation bioethanol (derived from lignocellulosic materials) based on pretreatment followed by hydrolysis and fermentation. With this approach, bioethanol can be obtained both from the hemicellulosic and cellulosic fractions of lignocellulosic materials, as well as spent solids enriched in lignin, which can be employed as a fuel or as a source of chemicals.