High demands for energy and concerns about global climate changes have led to the resurgence of bio-fuels. Bio-fuels are liquid or gaseous fuels made from plants and residues such as agricultural crops, municipal wastes and agricultural or forestry by-products. The second generation of bioethanol uses cellulosic wastes as feedstock because of its relative abundance and low cost. The materials investigated for the conversion of second generation bioethanol at present are extensive and most of them come from ...