Volume changes in saran charcoal caused by the adsorption of water, methanol and benzene vapours

✍ Scribed by J.R. Dacey; M.J.B. Evans

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 566 KB
• Volume: 9
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(71)90079-0

✦ Synopsis

Using a novel dilatometric technique the authors have measured volume changes produced in Saran charcoal by the adsorption of water, methanol and benzene vapours. With all three adsorbates, contraction in volume amounting to approximately

O-1 % was observed during adsorption, followed by a larger expansion as saturation was approached. Maximum contraction occurred when the water uptake was about 75% of the saturation value, while for methanol and benzene it occurred at less than half the saturation value. These observations are explained on the basis of the "bridging" of pores by adsorbed molecules suggested by Lakhanpal and Flood, assuming that the adsorbent has slot-like pores between 6 and 7 A in width.