Activated carbons were produced from low cost and locally available Damson plum (Prunus domestica L. subsp insititia) stones using ZnCl2 with chemical activation at different temperatures (400-700 °C) for N2, CO2 and CH4 adsorption. BET, BJH and t-plot methods were used for the characterization of Damson plum stones based activated carbon samples based on N2 adsorption-desorption data obtained at 77.4 K. The activated carbon samples obtained have high microporosity (19.9-25.3 Å), in the form of irregular structures. The highest value for the BET surface area was found as 1181.19 m2/g for the sample treated at 600 °C. The total pore volume of the AC400, AC500, AC600 and AC700 were determined as 0.309, 0.391, 0.742 and 0.482 cm3/g, respectively. CO2 and CH4 adsorption-desorption isotherms of the produced activated carbon samples were measured by using a static volumetric apparatus. The equilibrium experiments were conducted at 25 °C and at pressure values up to 900 mmHg. Adsorption capacities of CO2 and CH4 on activated carbon samples were related with the development of surface area. The activated carbons produced showed better CO2 adsorption than the CH4 adsorption. The results revealed that the Damson plum stones based activated carbons have the potential to be used as a low cost adsorbent for the CO2 and CH4 adsorptions.
Keywords: Damson plum stones, activated carbon, CO2 adsorption, CH4 adsorption, ZnCl2 activation.
Anahtar Kelimeler: Damson plum stones, Activated carbon, CO2 adsorption, CH4 adsorption, ZnCl2 activation.
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