Euro Polymer Science 2020 Characterization of components isolated from algerian apricot shells (prunus armeniaca l.) - Djennat Allouch, University Chadli Bendjedid El Tarf.

摘要

Shells resulting from food processing andagricultural activities, such as hard shells of apricot,are considered as wastes and are generally used asfuel. However, this residue shows promise aslignocellulosic feedstock for biorefineries, for itsconversion to liquid fuel or bio-products. Thisstudy is dedicated to the characterization andisolation of lignin, cellulose and hemicellulosesfrom apricot shells (AS). The chemicalcomposition and thermal stability of AS afterchemical treatment with solvents (ethanol-toluene),cellulose, hemicelluloses and lignin were analyzedby standard methods, i.e. Fourier-transform infraredspectroscopy (FTIR) and thermo gravimetric analysis(TGA). Further, almost 50.2 wt% of a water-insoluble extract was obtained after the bleachingprocess, which showed the removal of lignin, andthe final percentages for this extraction were50.2 ± 0.34%, 26.5 ± 0.83%, 23.7 ± 0.29% and35 ± 1% for holocellulose, cellulose,hemicelluloses and lignin, respectively. FTIRspectroscopy evidenced the structure of lignin,cellulose and hemicelluloses. Thermal analysisand the kinetic study suggested that cellulosehad higher thermal stability than the othercomponents, with the activation energy of 289.62kJ/mol. Thus, our results indicated the highpotential of AS to be used as an environmentallyfriendly material in a biorefinery, as well as in themodern polymer and chemical industries.