Abstract
Recent advancements in activated carbon production involve molten salt activation using a eutectic mixture of ZnCl2-NaCl-KCl. This study explores the production of activated carbon from fruit waste, specifically walnut shells, using a 60:20:20mol % eutectic mixture. Optimal conditions were identified through response surface methodology, with 400°C and a salt-to-biomass ratio of 10g/g, yielding a surface area of 276m2/g. These conditions were applied to cherry, olive, and plum stones, with plum stones achieving the highest surface area of 351m2/g. Characterization was performed through elemental and proximate analysis, gas adsorption (N2, CO2), and chemical adsorption of iodine and dyes. Despite some substandard qualities, the study highlights a unique mesoporous pore size distribution, with all samples exhibiting a distinct peak around 22nm, a characteristic feature of the eutectic salt mixture used.
Published Version
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