Preparation and characterization of activated carbon from coal by chemical activation with KOH

In this study, activated carbons (ACs) were produced from coal using potassium hydroxide as a chemical-activating agent. The preparation procedure composed of KOH impregnation followed by activation at 700°C-900°C under the nitrogen atmosphere for the time duration of 1 h. The effects of various act...

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Bibliographic Details
Published in:International journal of coal preparation and utilization 2022-05, Vol.42 (5), p.1477-1488
Main Authors: Wazir, Arshad Hussain, Haq, Izhar ul, Manan, Abdul, Khan, Attaullah
Format: Article
Language:English
Subjects:
Activated carbon
activation
Coal
Fourier transforms
Heat treatment
Heat treatments
Infrared analysis
Infrared spectroscopy
Potassium
Potassium hydroxide
Potassium hydroxides
Scanning electron microscopy
specific surface area
Surface area
surface morphology
thermal conversion
Thermogravimetric analysis
X-ray diffraction
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Summary:In this study, activated carbons (ACs) were produced from coal using potassium hydroxide as a chemical-activating agent. The preparation procedure composed of KOH impregnation followed by activation at 700°C-900°C under the nitrogen atmosphere for the time duration of 1 h. The effects of various activation temperatures and various KOH to coal ratios on the porous structure of the products were examined. The resulted ACs were also characterized by various techniques such as Brunauer-Emmett-Teller (BET) analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffraction (XRD) to confirm their characteristic properties. The surface area and pore volume of the resulted ACs increased with increasing temperature. The activated sample obtained from KOH to coal ratio of 2:1 and at heat treatment of 900°C under N 2 environment for 1 h found in the maximum BET specific surface area of about 1598.4 m 2 /g.
ISSN:1939-2699
1939-2702
DOI:10.1080/19392699.2020.1727896