Determination of Henry’s law constant of light hydrocarbon gases at low temperatures

The solubility of i-butane in water at the low temperatures was measured (274 K to 293 K). Additionally, Henry’s law constants of light hydrocarbons (methane, ethane, propane, i-butane, and n-butane) in water at the low temperatures are reported. A modified equation based on Krichevsky–Kasarnovsky equation is proposed to consider the effect of pressure and temperature on the equation parameters. Results show that Henry’s law constant of the selected components depends on temperature. It is deduced that pressure has a considerable effect on Henry’s law constant for methane, ethane, and propane, whereas this dependency for butanes is negligible.

► Henry’s constants of light hydrocarbon gases are reported at low temperatures.
► Solubility of iso-butane in water at low temperatures (275 K to 293 K) was measured.
► An expression of Krichevsky–Kasarnovsky equation is reported.