Moisture sorption by modified-activated carbons

✍ Scribed by A.M. Youssef; T.M. Ghazy; Th. El-Nabarawy

• Book ID: 103000069
• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 362 KB
• Volume: 20
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(82)90415-8

✦ Synopsis

&&act-Modified activated carbons were prepared by the partial oxidation of activated maghara coal with concentrated nitric acid and potassium permanganate. This treatment fixes more oxygen on the carbon surface leading thus to the formation of carbon-oxygen complexes which act as primary centers for water adsorption. Not only the number of oxygen complexes that can determine the water adsorption properties but the pore size may be considered as another factor. The oxygen complexes outgassed as carbon dioxide can be oualitativelv determined bv neutralization with sodium hydroxide. These oxygen complexes are responsible for the iireversibly adsorbed water.