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Preparation and characterization of activated carbon from cotton stalks in a two-stage process |
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| Authors: | Mustafa Ö zdemirTamer Bolgaz,Cafer Saka,Ö mer ?ahin |
| Affiliation: | a Faculty of Science and Letters, Department of Chemistry, Harran University, Sanl?urfa, Turkey b School of Health, Siirt University, Hospital Street, 56100 Siirt, Turkey c Faculty of Engineering and Architecture, Siirt University, 56100 Siirt, Turkey |
| Abstract: | Activated carbons are prepared from cotton stalks by chemical activation with ZnCl2, H2SO4 and physical activation using CO2 and steam-CO2 mixture for temperatures of 750, 850 and 900 °C. The effects of activation temperature and duration time, impregnation concentration of agent, impregnation times, and physical activating agent are examined. These materials are characterized by adsorption/desorption of N2 to determine the BET areas, thermogravimetric analysis (TG, DTA), FTIR and scanning electron microscopy (SEM). ZnCl2 under CO2 atmosphere was found more effective than H2SO4 as a chemical reagent under identical conditions in terms of porosity development. The maximum BET surface area is found to be 2053 m2/g for active carbons produced with ZnCl2 activation under CO2 atmosphere. |
| Keywords: | Activated carbon Cotton stalks Chemical activation Physical activation |
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