Design and construction of an equipment for the determination of solubility of gases in liquids

Abstract

This paper presents the design and construction of a new isochoric saturation apparatus for the determination of gas solubility in liquids based on the gas drop pressure method. The major improvement of this design is the separation between the solubility and the gas cells. With this separation, the change of pressure and temperature inside the system is minimum when the gas gets in contact with the liquid and it allows degassing the liquid in an easy way. The performance of the equipment was evaluated measuring the solubility of argon and nitrogen in pure water at (283.15, 288.15, 293.15 y 298.15) K. The gas solubility was calculated according to the Henry’s law. The results obtained and the comparison with literature values show that the equipment provides an accurate and precise method for determination of gas solubility in water.