The effect of chlorination on the adsorptive properties of water on carbon cloth

✍ Scribed by S.S. Barton; M.J.B. Evans; J.E. Koresh; H. Tobias

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 459 KB
• Volume: 25
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(87)90220-x

✦ Synopsis

The chlorination of carbon cloth, both as-received and air activated, at 400°C produces carbons exhibiting increased water adsorption. At least two types of fixed chlorine are formed. Chemisorbed chlorine (ca. 7% by weight) is formed at 400°C and is not removed by sweeping with argon at 400°C. In addition, strongly bound physisorbed chlorine (ca. 3% by weight) is found to be present if the chlorinated sample is cooled from 400°C in chlorine gas. This physisorbed chlorine has a large influence on the interaction of the carbon with water. The chemisorbed chlorine shows only a small effect. The removal of the fixed chlorine, either thermally at 350°C for the physisorbed portion or reduction by hydrogen at 600°C for the chemisorbed species produces a more open pore structure.