Publication Date:
2011-08-09
Description:
The contact angles of the aqueous solution of ethanol and that of n -propanol on copper, aluminum, and stainless steel surfaces are reported. The contact angles were measured under atmospheric conditions, and then under vapor-liquid equilibrium conditions at 1 atm and different temperatures. The results showed the variations of the contact angles with the concentrations of aqueous solutions on different metal material surfaces with different roughness. Some unstable behavior of the wetting ability around the azeotropic point of a binary solution is reported. Influences of concentration, kind of materials, and the surface roughness on the wetting ability are discussed. The model for predicting the contact angle of alcohol aqueous solutions on metal surfaces under atmospheric and vapor-liquid two-phase equilibrium conditions at 1 atm is derived from the Young equation. Wetting ability of a liquid on a packing surface is of great importance for gas-liquid contactors, such as distillation and absorption columns, especially for the cases where alcohol aqueous solution is involved. Consequently, the contact angles of the aqueous solution of ethanol and that of n -propanol on copper, aluminum, and stainless steel surfaces are reported in this paper. Contact angles were measured under atmospheric conditions, and then under vapor-liquid equilibrium conditions at 1 atm and different temperatures.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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