TY - JOUR T1 - The Activated Carbon from Walnut Shell Using CO2 and Methylene Blue Removal TT - Ceviz kabuğundan karbon dioksit kullanılarak aktif karbon üretimi ve metilen mavisi adsorpsiyonu. AU - Önal, Yunus AU - Küçük, İlhan AU - Başar, Canan PY - 2021 DA - March DO - 10.24012/dumf.816317 JF - Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi JO - DUJE PB - Dicle Üniversitesi WT - DergiPark SN - 1309-8640 SP - 297 EP - 308 VL - 12 IS - 2 LA - en AB - In this study, activated carbon with strong adsorption property was synthesized from lignocellulosic structured walnut shell. Active carbon synthesis was realized in two stages: carbonization and physical activation. Carbonization was carried out at 8 different temperatures (300-1000°C), 500 ml/min N2 gas flow and 10°C/min heating rate for 1 hour. Activation was done at 2 different temperatures (800- 900 °C) at 100 ml/min CO2 gas flow for 1 hour. Characterization of activated carbons was carried out and their adsorption capacities were examined with methylene blue. The surface areas of the activated carbons were investigated by BET analysis and the surface areas ranged from 652,22 to 56,79 m2/g. Amounts of micro and mesopores in these surface areas were calculated. Besides, SEM analysis indicates the porous structure and XRD analysis confirms that the structure is amorphous. Methylene blue adsorption was performed in the aqueous phase and the capacities of the activated carbons were calculated. The methylene blue adsorption capacity of activated carbons varies between 174,81-15,96 mg/g. KW - Biomass KW - carbonization KW - physical activation KW - activated carbon N2 - In this study, activated carbon with strong adsorption property was synthesized from lignocellulosic structured walnut shell. Active carbon synthesis was realized in two stages: carbonization and physical activation. Carbonization was carried out at 8 different temperatures (300-1000°C), 500 ml/min N2 gas flow and 10°C/min heating rate for 1 hour. Activation was done at 2 different temperatures (800- 900 °C) at 100 ml/min CO2 gas flow for 1 hour. Characterization of activated carbons was carried out and their adsorption capacities were examined with methylene blue. The surface areas of the activated carbons were investigated by BET analysis and the surface areas ranged from 652,22 to 56,79 m2/g. Amounts of micro and mesopores in these surface areas were calculated. Besides, SEM analysis indicates the porous structure and XRD analysis confirms that the structure is amorphous. Methylene blue adsorption was performed in the aqueous phase and the capacities of the activated carbons were calculated. The methylene blue adsorption capacity of activated carbons varies between 174,81-15,96 mg/g. CR - Refersns1. 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