The Activated Carbon from Walnut Shell Using CO2 and Methylene Blue Removal

Year 2021, , 297 - 308, 30.03.2021

İlhan Küçük Yunus Önal , Canan Başar

https://doi.org/10.24012/dumf.816317

Cited By: 1

Abstract

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.

Keywords

Biomass, carbonization, physical activation, activated carbon

Project Number

FDI-2017-680

Thanks

This study was supported by the unit of Scientific Researches of Inonu University in Malatya, Turkey; Project No: FDI-2017-680

Ceviz kabuğundan karbon dioksit kullanılarak aktif karbon üretimi ve metilen mavisi adsorpsiyonu.

Abstract

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.

Keywords

biyokütle, karbonizasyon, fiziksel aktivasyon, aktif karbon

Project Number

FDI-2017-680

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