Preparation and characterization of activated carbon from cotton stalks in a two-stage process

✍ Scribed by Mustafa Özdemir; Tamer Bolgaz; Cafer Saka; Ömer Şahin

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 444 KB
• Volume: 92
• Category: Article
• ISSN: 0165-2370
• DOI: 10.1016/j.jaap.2011.05.010

✦ Synopsis

Activated carbons are prepared from cotton stalks by chemical activation with ZnCl 2 , H 2 SO 4 and physical activation using CO 2 and steam-CO 2 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 N 2 to determine the BET areas, thermogravimetric analysis (TG, DTA), FTIR and scanning electron microscopy (SEM). ZnCl 2 under CO 2 atmosphere was found more effective than H 2 SO 4 as a chemical reagent under identical conditions in terms of porosity development. The maximum BET surface area is found to be 2053 m 2 /g for active carbons produced with ZnCl 2 activation under CO 2 atmosphere.