Preparation and characterization of chemically activated carbons from different varieties of date stones

摘要

Three activated carbon, Ghers Biskra (ACGB), Mech Biskra (ACMB) and Ghers El-Oued (ACGE) were prepared and characterized from date stone of the south of Algeria. The activation was achieved chemically by using phosphoric acid as an agent. The resulting materials were characterized by different techniques such scanning electron microscopy and Fourier transform infrared (FTIR) spectroscopy. The textural characterization was based on the evaluating of two major parameters: surface area and micropore volumes. The Brunauer-Emmett-Teller (BET) surface area and micropore volumes of optimized activated carbon ACGB, ACMB and ACGE were found to be 1,118, 950 and 749 m(2)/g and 0.52, 0.46 and 0.37 cm(3)/g, respectively. The analysis and the comparison of the experimental data show that the best parameters have been obtained with the ACGB date stones coming from Biskra region; a micro porosity of 93.64% and a pore radius of 8.95 angstrom were measured. Size microspores and energy of activation were determined by Dubinin-Radushkevich isotherm model. The functional groups of the different activated carbon surfaces were characterized by Boehm method and FTIR spectroscopy.